//go:build darwin

package main

/*
#cgo CFLAGS: -x objective-c -fobjc-arc -fblocks
#cgo LDFLAGS: -framework AppKit -framework CoreGraphics -framework QuartzCore
#include <math.h>
#include <dispatch/dispatch.h>
#import <objc/runtime.h>
#import <AppKit/AppKit.h>
#import <QuartzCore/QuartzCore.h>

extern void nativeOverlayConfirm(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlayCopy(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlaySave(int x, int y, int w, int h, const char *annotationsJSON, const char *dir);
extern void nativeOverlaySaveRemote(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlayUploadFTP(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlaySummarize(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlayOCR(int x, int y, int w, int h, const char *annotationsJSON);
extern void nativeOverlayCancel(void);

static NSWindow *nativeOverlayWindow = nil;
static id nativeOverlayKeyMonitor = nil;

@interface SnipNativeOverlayPanel : NSPanel
@end

@implementation SnipNativeOverlayPanel
- (BOOL)canBecomeKeyWindow { return YES; }
- (BOOL)canBecomeMainWindow { return YES; }
@end

// SnipHoverButton — NSButton subclass that animates its tint color on hover.
//
// Design rationale:
// - NSButton has no built-in hover state; we install an NSTrackingArea that
//   tracks mouseEntered/mouseExited regardless of focus state.
// - When the cursor enters, the content tint color animates from `baseColor`
//   to `hoverColor` over 0.2s using NSAnimationContext, matching the spec.
//   When the cursor leaves, the color reverts immediately (no animation).
// - `baseColor`/`hoverColor` are configurable per-instance so each action
//   button can keep a shared white default but expose its own hover hue
//   (cancel = red, others = blue).
@interface SnipHoverButton : NSButton
@property(strong) NSColor *baseColor;
@property(strong) NSColor *hoverColor;
@property(strong) NSTrackingArea *hoverTrackingArea;
@end

@implementation SnipHoverButton
- (void)updateTrackingAreas {
    [super updateTrackingAreas];
    if (_hoverTrackingArea) {
        [self removeTrackingArea:_hoverTrackingArea];
    }
    NSTrackingAreaOptions opts = NSTrackingMouseEnteredAndExited |
                                 NSTrackingActiveAlways |
                                 NSTrackingInVisibleRect;
    _hoverTrackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
                                                      options:opts
                                                        owner:self
                                                     userInfo:nil];
    [self addTrackingArea:_hoverTrackingArea];
}
- (void)mouseEntered:(NSEvent *)event {
    if (@available(macOS 10.14, *)) {
        NSColor *target = _hoverColor ?: [NSColor whiteColor];
        // Animate the tint color transition over 0.2s for a soft fade-in.
        [NSAnimationContext runAnimationGroup:^(NSAnimationContext *ctx) {
            [ctx setDuration:0.2];
            [ctx setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
            [[self animator] setContentTintColor:target];
        } completionHandler:nil];
    }
}
- (void)mouseExited:(NSEvent *)event {
    if (@available(macOS 10.14, *)) {
        NSColor *base = _baseColor ?: [NSColor whiteColor];
        // Snap back to the base color instantly (no animation) per spec.
        [self setContentTintColor:base];
    }
}
@end

@interface SnipToolSettingsView : NSView
@property CGFloat arrowX;
@end

@implementation SnipToolSettingsView
- (BOOL)isFlipped { return YES; }
- (void)drawRect:(NSRect)dirtyRect {
    [[NSColor clearColor] setFill];
    NSRectFill(dirtyRect);

    CGFloat arrowHalf = 8;
    CGFloat arrowH = 9;
    CGFloat radius = 8;
    NSRect body = NSMakeRect(0, arrowH, self.bounds.size.width, self.bounds.size.height - arrowH);
    CGFloat arrowX = MAX(18, MIN(_arrowX, self.bounds.size.width - 18));

    NSBezierPath *path = [NSBezierPath bezierPath];
    [path moveToPoint:NSMakePoint(NSMinX(body) + radius, NSMinY(body))];
    [path lineToPoint:NSMakePoint(arrowX - arrowHalf, NSMinY(body))];
    [path lineToPoint:NSMakePoint(arrowX, 0)];
    [path lineToPoint:NSMakePoint(arrowX + arrowHalf, NSMinY(body))];
    [path lineToPoint:NSMakePoint(NSMaxX(body) - radius, NSMinY(body))];
    [path curveToPoint:NSMakePoint(NSMaxX(body), NSMinY(body) + radius)
         controlPoint1:NSMakePoint(NSMaxX(body) - radius / 2, NSMinY(body))
         controlPoint2:NSMakePoint(NSMaxX(body), NSMinY(body) + radius / 2)];
    [path lineToPoint:NSMakePoint(NSMaxX(body), NSMaxY(body) - radius)];
    [path curveToPoint:NSMakePoint(NSMaxX(body) - radius, NSMaxY(body))
         controlPoint1:NSMakePoint(NSMaxX(body), NSMaxY(body) - radius / 2)
         controlPoint2:NSMakePoint(NSMaxX(body) - radius / 2, NSMaxY(body))];
    [path lineToPoint:NSMakePoint(NSMinX(body) + radius, NSMaxY(body))];
    [path curveToPoint:NSMakePoint(NSMinX(body), NSMaxY(body) - radius)
         controlPoint1:NSMakePoint(NSMinX(body) + radius / 2, NSMaxY(body))
         controlPoint2:NSMakePoint(NSMinX(body), NSMaxY(body) - radius / 2)];
    [path lineToPoint:NSMakePoint(NSMinX(body), NSMinY(body) + radius)];
    [path curveToPoint:NSMakePoint(NSMinX(body) + radius, NSMinY(body))
         controlPoint1:NSMakePoint(NSMinX(body), NSMinY(body) + radius / 2)
         controlPoint2:NSMakePoint(NSMinX(body) + radius / 2, NSMinY(body))];
    [path closePath];

    [[NSColor colorWithCalibratedWhite:1 alpha:0.96] setFill];
    [path fill];
}
@end

@interface SnipNativeOverlayView : NSView
@property BOOL hasSelection;
@property BOOL creating;
@property BOOL moving;
@property BOOL resizing;
@property BOOL annotating;
@property NSRect selection;
@property NSPoint anchor;
@property NSPoint moveOffset;
@property NSRect resizeStart;
@property NSString *resizeHandle;
@property NSString *activeTool;
@property(strong) NSColor *activeColor;
@property CGFloat activeStrokeWidth;
@property CGFloat activeFontSize;
@property CGFloat mosaicBrushWidth;
@property NSString *mosaicMode;
@property(strong) NSMutableArray<NSDictionary *> *annotations;
@property(strong) NSMutableDictionary *draftAnnotation;
// A downsampled snapshot of the screen beneath the overlay. Drawing this
// image back at full size with interpolation disabled produces a genuine
// pixel-block preview instead of a translucent placeholder stroke.
@property(strong) NSImage *mosaicPreviewImage;
@property(strong) NSButton *cancelButton;
// Use `clipboardButton` (not `copyButton`) to avoid ARC's "copy" method
// family ownership rule which would otherwise treat the synthesized getter
// as returning a +1 retained object.
@property(strong) NSButton *clipboardButton;
@property(strong) NSButton *saveButton;
@property(strong) NSButton *saveRemoteButton;
@property(strong) NSButton *ftpButton;
@property(strong) NSButton *ocrButton;
@property(strong) NSButton *summaryButton;
@property(strong) NSButton *uploadButton;
@property(strong) NSButton *penButton;
@property(strong) NSButton *lineButton;
@property(strong) NSButton *arrowButton;
@property(strong) NSButton *rectButton;
@property(strong) NSButton *ellipseButton;
@property(strong) NSButton *textButton;
@property(strong) NSButton *mosaicButton;
@property(strong) NSButton *undoButton;
@property(strong) SnipToolSettingsView *toolSettingsView;
@property(strong) NSView *settingsDivider;
@property(strong) NSMutableArray<NSButton *> *strokeSettingButtons;
@property(strong) NSMutableArray<NSButton *> *fontSettingButtons;
@property(strong) NSMutableArray<NSButton *> *colorSettingButtons;
@property(strong) NSMutableArray<NSButton *> *mosaicModeButtons;
@property(strong) NSMutableArray<NSButton *> *mosaicWidthButtons;
@property(strong) NSView *actionToolbarBg;
@property(strong) NSTextField *textEditor;
@property NSPoint textEditorLocalPoint;
@property NSInteger textEditorAnnotationIndex;
@property(strong) NSColor *textEditorColor;
@property NSInteger selectedTextAnnotationIndex;
@property BOOL draggingTextAnnotation;
@property NSPoint textDragStartLocalPoint;
@property NSPoint textDragOriginalLocalPoint;
@property(strong) NSTextField *sizeLabel;
@property(strong) NSTextField *hintLabel;
- (void)syncControls;
- (void)styleControls;
- (void)selectText;
- (void)confirmSelection;
- (void)copySelection;
- (void)saveSelection;
- (void)saveRemoteSelection;
- (void)uploadFTPSelection;
- (void)ocrSelection;
- (void)summarizeSelection;
- (void)cancelSelection;
- (void)beginTextAnnotationAtPoint:(NSPoint)localPoint;
- (void)beginEditingTextAnnotationAtIndex:(NSInteger)index;
- (NSInteger)textAnnotationIndexAtPoint:(NSPoint)p;
- (NSRect)textAnnotationRectForItem:(NSDictionary *)item;
- (NSPoint)clampedTextLocalPoint:(NSPoint)localPoint text:(NSString *)text fontSize:(CGFloat)fontSize;
- (void)selectStrokeWidth:(NSButton *)sender;
- (void)selectFontSize:(NSButton *)sender;
- (void)selectToolColor:(NSButton *)sender;
- (void)selectMosaicMode:(NSButton *)sender;
- (void)selectMosaicWidth:(NSButton *)sender;
- (BOOL)isEditingText;
- (void)commitTextEditor;
- (void)cancelTextEditor;
@end

@implementation SnipNativeOverlayView
- (BOOL)isFlipped { return YES; }
- (BOOL)acceptsFirstResponder { return YES; }

- (instancetype)initWithFrame:(NSRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setWantsLayer:YES];
        [[self layer] setBackgroundColor:[[NSColor clearColor] CGColor]];

        _activeTool = nil;
        _activeColor = [NSColor colorWithCalibratedRed:239.0/255.0 green:68.0/255.0 blue:68.0/255.0 alpha:1.0];
        _activeStrokeWidth = 3.0;
        _activeFontSize = 20.0;
        _mosaicBrushWidth = 24.0;
        _mosaicMode = @"brush";
        _annotations = [NSMutableArray array];
        _textEditorAnnotationIndex = -1;
        _selectedTextAnnotationIndex = -1;

        // Use SnipHoverButton for the action buttons so we get hover-color
        // animation. Annotation buttons stay as plain NSButton because they
        // already have explicit on/off "active" styling.
        _cancelButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(cancelSelection)];
        _clipboardButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(copySelection)];
        _saveButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(saveSelection)];
        _saveRemoteButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(saveRemoteSelection)];
        _ftpButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(uploadFTPSelection)];
        _ocrButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(ocrSelection)];
        _summaryButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(summarizeSelection)];
        _uploadButton = [SnipHoverButton buttonWithTitle:@"" target:self action:@selector(confirmSelection)];
        // Tooltip strings shown on hover for each action button.
        // Localized in Chinese to match the rest of the action UI surface.
        [_cancelButton setToolTip:@"取消截图"];
        [_clipboardButton setToolTip:@"复制图片"];
        [_saveButton setToolTip:@"保存本地"];
        [_saveRemoteButton setToolTip:@"上传 SSH/SCP"];
        [_ftpButton setToolTip:@"上传 FTP/SFTP"];
        [_ocrButton setToolTip:@"提取文字"];
        [_summaryButton setToolTip:@"复制总结"];
        [_uploadButton setToolTip:@"上传 S3"];
        _penButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectPen)];
        _lineButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectLine)];
        _arrowButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectArrow)];
        _rectButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectRect)];
        _ellipseButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectEllipse)];
        _textButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectText)];
        _mosaicButton = [NSButton buttonWithTitle:@"" target:self action:@selector(selectMosaic)];
        _undoButton = [NSButton buttonWithTitle:@"" target:self action:@selector(undoAnnotation)];
        _toolSettingsView = [[SnipToolSettingsView alloc] initWithFrame:NSZeroRect];
        _settingsDivider = [[NSView alloc] initWithFrame:NSZeroRect];
        _strokeSettingButtons = [NSMutableArray array];
        _fontSettingButtons = [NSMutableArray array];
        _colorSettingButtons = [NSMutableArray array];
        _mosaicModeButtons = [NSMutableArray array];
        _mosaicWidthButtons = [NSMutableArray array];
        // Dark rounded background container behind the action icon buttons,
        // mirroring the look of `.action-toolbar` in the Vue overlay.
        _actionToolbarBg = [[NSView alloc] initWithFrame:NSZeroRect];
        [_actionToolbarBg setWantsLayer:YES];
        [[_actionToolbarBg layer] setCornerRadius:8];
        [[_actionToolbarBg layer] setBackgroundColor:[[NSColor colorWithCalibratedWhite:0.11 alpha:0.94] CGColor]];
        _sizeLabel = [NSTextField labelWithString:@""];
        _hintLabel = [NSTextField labelWithString:@"Drag to select an area  ·  Esc to cancel"];
        [self styleControls];

        // Add the action toolbar background BEFORE the buttons so it sits
        // behind them in the view hierarchy (AppKit z-order = subview order).
        [self addSubview:_actionToolbarBg];
        for (NSView *view in @[_cancelButton, _clipboardButton, _saveButton, _saveRemoteButton, _ftpButton, _ocrButton, _summaryButton, _uploadButton, _penButton, _lineButton, _arrowButton, _rectButton, _ellipseButton, _textButton, _mosaicButton, _undoButton, _toolSettingsView, _sizeLabel, _hintLabel]) {
            [self addSubview:view];
        }
        for (NSView *view in @[_cancelButton, _clipboardButton, _saveButton, _saveRemoteButton, _ftpButton, _ocrButton, _summaryButton, _uploadButton, _penButton, _lineButton, _arrowButton, _rectButton, _ellipseButton, _textButton, _mosaicButton, _undoButton, _toolSettingsView, _actionToolbarBg]) {
            [view setHidden:YES];
        }
        [_sizeLabel setHidden:YES];

        [_sizeLabel setTextColor:[NSColor whiteColor]];
        [_sizeLabel setBackgroundColor:[NSColor colorWithCalibratedWhite:0.08 alpha:0.78]];
        [_sizeLabel setDrawsBackground:YES];
        [_sizeLabel setBezeled:NO];
        [_sizeLabel setAlignment:NSTextAlignmentCenter];

        [_hintLabel setTextColor:[NSColor whiteColor]];
        [_hintLabel setBackgroundColor:[NSColor colorWithCalibratedWhite:0.0 alpha:0.5]];
        [_hintLabel setDrawsBackground:YES];
        [_hintLabel setBezeled:NO];
        [_hintLabel setAlignment:NSTextAlignmentCenter];
        [_hintLabel setFrame:NSMakeRect((frame.size.width - 320) / 2, 24, 320, 24)];
    }
    return self;
}

- (NSString *)hexForColor:(NSColor *)color {
    NSColor *rgb = [color colorUsingColorSpace:[NSColorSpace sRGBColorSpace]];
    NSInteger r = (NSInteger)llround([rgb redComponent] * 255.0);
    NSInteger g = (NSInteger)llround([rgb greenComponent] * 255.0);
    NSInteger b = (NSInteger)llround([rgb blueComponent] * 255.0);
    return [NSString stringWithFormat:@"#%02lx%02lx%02lx", (long)r, (long)g, (long)b];
}

- (NSImage *)iconFromSVG:(NSString *)svg {
    NSData *data = [svg dataUsingEncoding:NSUTF8StringEncoding];
    NSImage *image = [[NSImage alloc] initWithData:data];
    [image setTemplate:YES];
    return image;
}

- (void)styleButton:(NSButton *)button background:(NSColor *)background foreground:(NSColor *)foreground {
    [button setBordered:NO];
    [button setBezelStyle:NSBezelStyleRegularSquare];
    [button setWantsLayer:YES];
    [[button layer] setCornerRadius:5];
    [[button layer] setBackgroundColor:[background CGColor]];
    NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:[button title]];
    [title addAttribute:NSForegroundColorAttributeName value:foreground range:NSMakeRange(0, [title length])];
    [title addAttribute:NSFontAttributeName value:[NSFont systemFontOfSize:12 weight:NSFontWeightMedium] range:NSMakeRange(0, [title length])];
    [button setAttributedTitle:title];
}

- (void)styleIconButton:(NSButton *)button image:(NSImage *)image {
    [button setBordered:NO];
    [button setBezelStyle:NSBezelStyleRegularSquare];
    [button setImagePosition:NSImageOnly];
    [button setImageScaling:NSImageScaleProportionallyDown];
    if (@available(macOS 10.14, *)) {
        [button setContentTintColor:[NSColor whiteColor]];
    }
    [button setImage:image];
    [button setWantsLayer:YES];
    [[button layer] setCornerRadius:5];
    [[button layer] setBackgroundColor:[[NSColor clearColor] CGColor]];
}

- (void)styleControls {
    // Cancel / Copy / Save / SSH / FTP / OCR / Summary / S3 — square icon buttons
    // rendered from the user-supplied SVG assets. All actions default to white
    // and animate to a per-action accent color on hover (cancel = red,
    // others = blue). The base "white default" replaces the previous blue
    // upload tint so the toolbar reads as a uniform icon row.
    NSImage *cancelIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M512 85.333333c235.648 0 426.666667 191.018667 426.666667 426.666667s-191.018667 426.666667-426.666667 426.666667S85.333333 747.648 85.333333 512 276.352 85.333333 512 85.333333zM170.666667 512a341.333333 341.333333 0 0 0 550.613333 269.653333L242.304 302.762667A339.84 339.84 0 0 0 170.666667 512z m341.333333-341.333333c-78.848 0-151.466667 26.752-209.28 71.68l478.976 478.933333A341.333333 341.333333 0 0 0 512 170.666667z' fill='white'/></svg>"];
    NSImage *copyIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M768 256a85.333333 85.333333 0 0 1 85.333333 85.333333v512a85.333333 85.333333 0 0 1-85.333333 85.333334h-341.333333a85.333333 85.333333 0 0 1-85.333334-85.333334V341.333333a85.333333 85.333333 0 0 1 85.333334-85.333333h341.333333z m0 85.333333h-341.333333v512h341.333333V341.333333z m-128-256a42.666667 42.666667 0 0 1 42.666667 42.666667l-0.042667 42.666667H256l-0.042667 597.333333H213.333333a42.666667 42.666667 0 0 1-42.666666-42.666667V170.666667a85.333333 85.333333 0 0 1 85.333333-85.333334h384z' fill='white'/></svg>"];
    NSImage *saveIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M896 810.666667a85.333333 85.333333 0 0 1-85.333333 85.333333H213.333333a85.333333 85.333333 0 0 1-85.333333-85.333333V213.333333a85.333333 85.333333 0 0 1 85.333333-85.333333h250.368a85.333333 85.333333 0 0 1 73.173334 41.429333L563.2 213.333333H810.666667a85.333333 85.333333 0 0 1 85.333333 85.333334v512z m-85.333333-341.333334H213.333333v341.333334h597.333334v-341.333334z m-346.965334-256H213.333333v170.666667h597.333334V298.666667h-271.616a42.666667 42.666667 0 0 1-36.608-20.736L463.701333 213.333333z' fill='white'/></svg>"];
    // save-remote.svg — provided by the user; its content is the same arrow
    // icon as the previous upload, so we reuse it verbatim here.
    NSImage *saveRemoteIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M481.749333 353.792c16.682667-16.64 43.690667-16.64 60.373334 0l120.917333 120.832 3.541333 4.010667a42.666667 42.666667 0 0 1-63.872 56.32L554.666667 486.954667V896a42.666667 42.666667 0 0 1-85.333334 0v-409.173333l-48.170666 48.128a42.666667 42.666667 0 0 1-60.330667 0l-3.541333-4.010667a42.666667 42.666667 0 0 1 3.541333-56.32zM512 85.333333c122.538667 0 227.84 73.813333 273.92 179.370667A213.333333 213.333333 0 0 1 725.333333 682.666667a42.666667 42.666667 0 0 1-4.992-85.034667L725.333333 597.333333a128 128 0 0 0 36.394667-250.794666l-38.144-11.264-15.914667-36.437334a213.376 213.376 0 0 0-407.296 58.026667l-7.381333 58.368-57.173333 13.824A85.418667 85.418667 0 0 0 256 597.333333h42.666667a42.666667 42.666667 0 0 1 0 85.333334H256a170.666667 170.666667 0 0 1-40.277333-336.554667A298.709333 298.709333 0 0 1 512 85.333333z' fill='white'/></svg>"];
    NSImage *ftpIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M128 128h768v256H128V128zm64 64v128h640V192H192zm64 48h64v32h-64v-32zM128 448h416v64H192v192h352v64H128V448zm560-32 160 160-45.248 45.248L720 538.496V832h-64V538.496l-82.752 82.752L528 576l160-160z' fill='white'/></svg>"];
    NSImage *ocrIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M192 160h192v64H256v128h-64V160zM640 160h192v192h-64V224H640v-64zM256 672v128h128v64H192V672h64zM832 672v192H640v-64h128V672h64zM469.333333 288h85.333334l170.666666 448h-78.933333l-39.253333-106.666667H416.853333L377.6 736H298.666667l170.666666-448zM439.466667 565.333333h144.896L512 368.981333 439.466667 565.333333z' fill='white'/></svg>"];
    NSImage *summaryIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M256 128h448l192 192v576H256V128z m64 64v640h512V352H672V192H320z m416 45.248V288h50.752L736 237.248zM384 448h384v64H384v-64z m0 128h384v64H384v-64z m0 128h256v64H384v-64zM192 256v704h512v64H128V256h64z' fill='white'/></svg>"];
    // upload.svg — newly replaced "send/cloud" icon supplied by the user.
    NSImage *uploadIcon = [self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M550.528 544.128L640 539.776V678.4l178.005333-178.005333L640 322.389333v129.024l-72.618667 10.922667c-155.52 23.424-251.733333 73.557333-312.874666 164.437333 84.906667-50.602667 178.261333-76.928 296.021333-82.645333zM554.666667 629.376c-27.392 1.322667-53.034667 3.968-77.141334 7.808l-8.192 1.365333c-136.704 23.637333-224.810667 87.168-310.954666 176.128-26.154667 27.008-51.882667 59.648-51.882667 59.648-14.848 18.176-24.021333 14.037333-20.352-9.173333 0 0 4.394667-31.402667 11.690667-65.792C144.938667 577.066667 250.581333 423.68 554.666667 377.941333V209.066667a38.4 38.4 0 0 1 65.536-27.136l291.328 291.285333a38.4 38.4 0 0 1 0 54.314667l-291.328 291.285333A38.4 38.4 0 0 1 554.666667 791.637333v-162.261333z' fill='white'/></svg>"];

    [self styleIconButton:_cancelButton image:cancelIcon];
    [self styleIconButton:_clipboardButton image:copyIcon];
    [self styleIconButton:_saveButton image:saveIcon];
    [self styleIconButton:_saveRemoteButton image:saveRemoteIcon];
    [self styleIconButton:_ftpButton image:ftpIcon];
    [self styleIconButton:_ocrButton image:ocrIcon];
    [self styleIconButton:_summaryButton image:summaryIcon];
    [self styleIconButton:_uploadButton image:uploadIcon];

    // Configure hover colors for the action buttons. White is the shared
    // base; cancel turns red on hover and the rest turn blue, providing a
    // glance-able cue for destructive vs. constructive actions.
    NSColor *baseWhite = [NSColor whiteColor];
    NSColor *hoverRed  = [NSColor colorWithCalibratedRed:248.0/255.0 green:113.0/255.0 blue:113.0/255.0 alpha:1.0];
    NSColor *hoverBlue = [NSColor colorWithCalibratedRed:96.0/255.0  green:165.0/255.0 blue:250.0/255.0 alpha:1.0];
    SnipHoverButton *cancelHB     = (SnipHoverButton *)_cancelButton;
    SnipHoverButton *clipboardHB  = (SnipHoverButton *)_clipboardButton;
    SnipHoverButton *saveHB       = (SnipHoverButton *)_saveButton;
    SnipHoverButton *saveRemoteHB = (SnipHoverButton *)_saveRemoteButton;
    SnipHoverButton *ftpHB        = (SnipHoverButton *)_ftpButton;
    SnipHoverButton *ocrHB        = (SnipHoverButton *)_ocrButton;
    SnipHoverButton *summaryHB    = (SnipHoverButton *)_summaryButton;
    SnipHoverButton *uploadHB     = (SnipHoverButton *)_uploadButton;
    cancelHB.baseColor = baseWhite;     cancelHB.hoverColor = hoverRed;
    clipboardHB.baseColor = baseWhite;  clipboardHB.hoverColor = hoverBlue;
    saveHB.baseColor = baseWhite;       saveHB.hoverColor = hoverBlue;
    saveRemoteHB.baseColor = baseWhite; saveRemoteHB.hoverColor = hoverBlue;
    ftpHB.baseColor = baseWhite;        ftpHB.hoverColor = hoverBlue;
    ocrHB.baseColor = baseWhite;        ocrHB.hoverColor = hoverBlue;
    summaryHB.baseColor = baseWhite;    summaryHB.hoverColor = hoverBlue;
    uploadHB.baseColor = baseWhite;     uploadHB.hoverColor = hoverBlue;

    [self styleIconButton:_penButton image:[self iconFromSVG:@"<svg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><g fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'><path d='m14.5 5.5 4-4 4 4-4 4'/><path d='m17.5 8.5-7.8 7.8'/><path d='M11 14.8c.8 2.8-.7 5.5-3.7 6.3-1.8.5-3.7.1-5.3-.9 2.1-.4 2.8-1.5 3.1-3.3.4-2.5 3.3-3.8 5.9-2.1Z'/></g></svg>"]];
    [self styleIconButton:_lineButton image:[self iconFromSVG:@"<svg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><path d='M5 19 19 5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round'/></svg>"]];
    [self styleIconButton:_arrowButton image:[self iconFromSVG:@"<svg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><g fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M5 19 19 5'/><path d='M11 5h8v8'/></g></svg>"]];
    [_penButton setToolTip:@"画笔标记"];
    [_lineButton setToolTip:@"直线标记"];
    [_arrowButton setToolTip:@"箭头标记"];
    [self styleIconButton:_rectButton image:[self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M96 96h832v832H96V96z m32 32v768h768V128H128z' fill='white'/></svg>"]];
    [self styleIconButton:_ellipseButton image:[self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M512 928c229.76 0 416-186.24 416-416S741.76 96 512 96 96 282.24 96 512s186.24 416 416 416z m0-32C299.936 896 128 724.064 128 512S299.936 128 512 128s384 171.936 384 384-171.936 384-384 384z' fill='white'/></svg>"]];
    [self styleIconButton:_textButton image:[self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M224 160h576v96H560v608h-96V256H224V160zM384 864h256v64H384v-64z' fill='white'/></svg>"]];
    [self styleIconButton:_mosaicButton image:[self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><path d='M128 128h320v320H128V128zm448 0h320v320H576V128zM128 576h320v320H128V576zm448 0h320v320H576V576z' fill='white'/></svg>"]];
    [_mosaicButton setToolTip:@"马赛克标记"];
    [self styleIconButton:_undoButton image:[self iconFromSVG:@"<svg viewBox='0 0 1024 1024' xmlns='http://www.w3.org/2000/svg'><g transform='translate(1024 0) scale(-1 1)'><path d='M838.976 288l-169.344-162.56a16 16 0 1 1 22.144-23.04l213.632 204.992-213.312 215.84a16 16 0 0 1-22.784-22.464L847.936 320H454.56c-164.192 0-297.28 128.96-297.28 288s133.088 288 297.28 288H704v32h-242.784C266.88 928 128 784.736 128 608S266.88 288 461.248 288h377.728z' fill='white'/></g></svg>"]];

    [_toolSettingsView setWantsLayer:NO];
    [_settingsDivider setWantsLayer:YES];
    [[_settingsDivider layer] setBackgroundColor:[[NSColor colorWithCalibratedWhite:0.82 alpha:1] CGColor]];
    [_toolSettingsView addSubview:_settingsDivider];

    for (NSNumber *width in @[@2, @4, @6]) {
        NSButton *button = [NSButton buttonWithTitle:@"●" target:self action:@selector(selectStrokeWidth:)];
        [button setTag:[width integerValue]];
        [button setBordered:NO];
        [button setWantsLayer:YES];
        [[button layer] setCornerRadius:6];
        NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:@"●"];
        [title addAttribute:NSFontAttributeName value:[NSFont systemFontOfSize:8 + [width doubleValue] * 2 weight:NSFontWeightBold] range:NSMakeRange(0, title.length)];
        [button setAttributedTitle:title];
        [_strokeSettingButtons addObject:button];
        [_toolSettingsView addSubview:button];
    }

    for (NSNumber *size in @[@16, @20, @28, @36]) {
        NSButton *button = [NSButton buttonWithTitle:[NSString stringWithFormat:@"%ld", (long)[size integerValue]] target:self action:@selector(selectFontSize:)];
        [button setTag:[size integerValue]];
        [button setBordered:NO];
        [button setWantsLayer:YES];
        [[button layer] setCornerRadius:6];
        NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:[button title]];
        [title addAttribute:NSForegroundColorAttributeName value:[NSColor colorWithCalibratedWhite:0.12 alpha:1] range:NSMakeRange(0, title.length)];
        [title addAttribute:NSFontAttributeName value:[NSFont systemFontOfSize:13 weight:NSFontWeightBold] range:NSMakeRange(0, title.length)];
        [button setAttributedTitle:title];
        [_fontSettingButtons addObject:button];
        [_toolSettingsView addSubview:button];
    }

    for (NSUInteger i = 0; i < 2; i++) {
        NSButton *button = [NSButton buttonWithTitle:@"" target:self action:@selector(selectMosaicMode:)];
        [button setTag:(NSInteger)i];
        [button setBordered:NO];
        [button setWantsLayer:YES];
        [[button layer] setCornerRadius:5];
        NSString *svg = i == 0
            ? @"<svg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><g fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'><path d='M9 11V5.5a2 2 0 0 1 4 0V10'/><path d='M13 10V8a2 2 0 0 1 4 0v3'/><path d='M17 10a2 2 0 0 1 4 0v4.5c0 4-2.5 6.5-6.5 6.5h-1.2a6 6 0 0 1-4.7-2.3L4 13.2a1.9 1.9 0 0 1 2.8-2.5L9 12.5'/></g></svg>"
            : @"<svg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><g fill='none' stroke='black' stroke-width='1.8' stroke-linejoin='round'><rect x='2.5' y='2.5' width='19' height='19' rx='2'/></g><g fill='black'><rect x='6' y='6' width='4' height='4' rx='.5'/><rect x='14' y='6' width='4' height='4' rx='.5'/><rect x='6' y='14' width='4' height='4' rx='.5'/><rect x='14' y='14' width='4' height='4' rx='.5'/></g></svg>";
        [button setImage:[self iconFromSVG:svg]];
        [button setImagePosition:NSImageOnly];
        [button setImageScaling:NSImageScaleProportionallyDown];
        NSString *accessibilityLabel = i == 0 ? @"涂抹马赛克" : @"框选马赛克";
        [button setToolTip:accessibilityLabel];
        [button setAccessibilityLabel:accessibilityLabel];
        [_mosaicModeButtons addObject:button];
        [_toolSettingsView addSubview:button];
    }
    for (NSNumber *width in @[@16, @24, @36, @52]) {
        NSButton *button = [NSButton buttonWithTitle:@"●" target:self action:@selector(selectMosaicWidth:)];
        [button setTag:[width integerValue]];
        [button setBordered:NO];
        [button setWantsLayer:YES];
        [[button layer] setCornerRadius:6];
        NSMutableAttributedString *title = [[NSMutableAttributedString alloc] initWithString:@"●"];
        [title addAttribute:NSFontAttributeName value:[NSFont systemFontOfSize:MIN(22, 6 + [width doubleValue] / 3) weight:NSFontWeightBold] range:NSMakeRange(0, title.length)];
        [button setAttributedTitle:title];
        [_mosaicWidthButtons addObject:button];
        [_toolSettingsView addSubview:button];
    }

    NSArray *colors = @[
        [NSColor colorWithCalibratedRed:239.0/255.0 green:68.0/255.0 blue:68.0/255.0 alpha:1.0],
        [NSColor colorWithCalibratedRed:250.0/255.0 green:204.0/255.0 blue:21.0/255.0 alpha:1.0],
        [NSColor colorWithCalibratedRed:34.0/255.0 green:197.0/255.0 blue:94.0/255.0 alpha:1.0],
        [NSColor colorWithCalibratedRed:59.0/255.0 green:130.0/255.0 blue:246.0/255.0 alpha:1.0],
        [NSColor colorWithCalibratedWhite:0.0 alpha:1.0],
        [NSColor colorWithCalibratedRed:156.0/255.0 green:163.0/255.0 blue:175.0/255.0 alpha:1.0],
        [NSColor whiteColor]
    ];
    for (NSUInteger i = 0; i < colors.count; i++) {
        NSButton *button = [NSButton buttonWithTitle:@"" target:self action:@selector(selectToolColor:)];
        [button setTag:(NSInteger)i];
        [button setBordered:NO];
        [button setWantsLayer:YES];
        [[button layer] setCornerRadius:4];
        [[button layer] setBorderWidth:1];
        [[button layer] setBorderColor:[[NSColor colorWithCalibratedWhite:0.12 alpha:0.22] CGColor]];
        [[button layer] setBackgroundColor:[colors[i] CGColor]];
        [_colorSettingButtons addObject:button];
        [_toolSettingsView addSubview:button];
    }
    objc_setAssociatedObject(_toolSettingsView, "snapgoColors", colors, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void)drawRect:(NSRect)dirtyRect {
    [[NSColor colorWithCalibratedWhite:0.0 alpha:0.48] setFill];
    if (_hasSelection) {
        NSRect top = NSMakeRect(0, 0, self.bounds.size.width, _selection.origin.y);
        NSRect left = NSMakeRect(0, _selection.origin.y, _selection.origin.x, _selection.size.height);
        NSRect right = NSMakeRect(NSMaxX(_selection), _selection.origin.y, self.bounds.size.width - NSMaxX(_selection), _selection.size.height);
        NSRect bottom = NSMakeRect(0, NSMaxY(_selection), self.bounds.size.width, self.bounds.size.height - NSMaxY(_selection));
        NSRectFill(top);
        NSRectFill(left);
        NSRectFill(right);
        NSRectFill(bottom);

        NSBezierPath *border = [NSBezierPath bezierPathWithRect:NSInsetRect(_selection, 0.75, 0.75)];
        [border setLineWidth:1.5];
        [[NSColor colorWithCalibratedRed:59.0/255.0 green:130.0/255.0 blue:246.0/255.0 alpha:1.0] setStroke];
        [border stroke];

        CGFloat corner = 8;
        NSBezierPath *corners = [NSBezierPath bezierPath];
        [corners moveToPoint:NSMakePoint(NSMinX(_selection), NSMinY(_selection) + corner)];
        [corners lineToPoint:NSMakePoint(NSMinX(_selection), NSMinY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMinX(_selection) + corner, NSMinY(_selection))];
        [corners moveToPoint:NSMakePoint(NSMaxX(_selection) - corner, NSMinY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMaxX(_selection), NSMinY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMaxX(_selection), NSMinY(_selection) + corner)];
        [corners moveToPoint:NSMakePoint(NSMaxX(_selection), NSMaxY(_selection) - corner)];
        [corners lineToPoint:NSMakePoint(NSMaxX(_selection), NSMaxY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMaxX(_selection) - corner, NSMaxY(_selection))];
        [corners moveToPoint:NSMakePoint(NSMinX(_selection) + corner, NSMaxY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMinX(_selection), NSMaxY(_selection))];
        [corners lineToPoint:NSMakePoint(NSMinX(_selection), NSMaxY(_selection) - corner)];
        [corners setLineWidth:3];
        [corners stroke];

        [self drawAnnotations];
        [self drawResizeHandles];
    } else {
        NSRectFill(self.bounds);
    }
}

- (void)drawResizeHandles {
    NSArray *points = @[
        [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMinY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMidX(_selection), NSMinY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMinY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMidY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMaxY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMidX(_selection), NSMaxY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMaxY(_selection))],
        [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMidY(_selection))]
    ];
    [[NSColor whiteColor] setStroke];
    [[NSColor colorWithCalibratedRed:59.0/255.0 green:130.0/255.0 blue:246.0/255.0 alpha:1.0] setFill];
    for (NSValue *value in points) {
        NSPoint p = [value pointValue];
        NSRect handleRect = NSMakeRect(p.x - 5, p.y - 5, 10, 10);
        NSBezierPath *path = [NSBezierPath bezierPathWithRect:handleRect];
        [path fill];
        [path stroke];
    }
}

- (CGFloat)fontSizeForTextItem:(NSDictionary *)item {
    NSNumber *fontSize = item[@"fontSize"];
    if (fontSize != nil && [fontSize doubleValue] > 0) {
        return [fontSize doubleValue];
    }
    return 20.0;
}

- (CGFloat)strokeWidthForItem:(NSDictionary *)item {
    NSNumber *strokeWidth = item[@"strokeWidth"];
    if (strokeWidth != nil && [strokeWidth doubleValue] > 0) {
        return [strokeWidth doubleValue];
    }
    return 3.0;
}

- (NSDictionary *)textAttributesWithFontSize:(CGFloat)fontSize color:(NSColor *)color {
    return @{
        NSFontAttributeName: [NSFont systemFontOfSize:fontSize weight:NSFontWeightSemibold],
        NSForegroundColorAttributeName: color ?: [NSColor whiteColor]
    };
}

- (NSSize)textSizeForString:(NSString *)text fontSize:(CGFloat)fontSize {
    NSString *measured = text.length > 0 ? text : @" ";
    NSDictionary *attrs = [self textAttributesWithFontSize:fontSize color:[NSColor whiteColor]];
    NSRect bounds = [measured boundingRectWithSize:NSMakeSize(CGFLOAT_MAX, CGFLOAT_MAX)
                                           options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
                                        attributes:attrs];
    return NSMakeSize(ceil(MAX(1.0, bounds.size.width)), ceil(MAX(fontSize * 1.2, bounds.size.height)));
}

- (NSSize)textEditorSizeForString:(NSString *)text fontSize:(CGFloat)fontSize {
    NSSize textSize = [self textSizeForString:text fontSize:fontSize];
    return NSMakeSize(MAX(180, MIN(420, textSize.width + 28)), MAX(30, ceil(fontSize * 1.6)));
}

- (NSRect)textEditorFrameForLocalPoint:(NSPoint)localPoint text:(NSString *)text fontSize:(CGFloat)fontSize {
    NSSize editorSize = [self textEditorSizeForString:text fontSize:fontSize];
    NSPoint clampedLocal = [self clampedTextLocalPoint:localPoint text:text fontSize:fontSize];
    NSRect frame = NSMakeRect(_selection.origin.x + clampedLocal.x, _selection.origin.y + clampedLocal.y, editorSize.width, editorSize.height);
    CGFloat maxX = self.bounds.size.width - frame.size.width - 8;
    CGFloat maxY = self.bounds.size.height - frame.size.height - 8;
    frame.origin.x = MAX(8, MIN(frame.origin.x, maxX));
    frame.origin.y = MAX(8, MIN(frame.origin.y, maxY));
    return frame;
}

- (void)resizeTextEditorForCurrentFont {
    if (_textEditor == nil) {
        return;
    }
    NSString *text = [_textEditor stringValue] ?: @"";
    NSRect frame = [self textEditorFrameForLocalPoint:_textEditorLocalPoint text:text fontSize:_activeFontSize];
    [_textEditor setFrame:frame];
    _textEditorLocalPoint = [self localPoint:frame.origin];
}

- (NSRect)textAnnotationRectForItem:(NSDictionary *)item {
    if (![item[@"tool"] isEqualToString:@"text"]) {
        return NSZeroRect;
    }
    NSArray *points = item[@"points"];
    NSString *text = item[@"text"];
    if (points.count == 0 || text.length == 0) {
        return NSZeroRect;
    }
    NSPoint p = [points[0] pointValue];
    CGFloat fontSize = [self fontSizeForTextItem:item];
    NSSize size = [self textSizeForString:text fontSize:fontSize];
    return NSMakeRect(_selection.origin.x + p.x, _selection.origin.y + p.y, size.width, size.height);
}

- (NSPoint)clampedTextLocalPoint:(NSPoint)localPoint text:(NSString *)text fontSize:(CGFloat)fontSize {
    NSSize size = [self textSizeForString:text fontSize:fontSize];
    CGFloat maxX = MAX(0, _selection.size.width - size.width);
    CGFloat maxY = MAX(0, _selection.size.height - size.height);
    return NSMakePoint(MAX(0, MIN(localPoint.x, maxX)), MAX(0, MIN(localPoint.y, maxY)));
}

- (NSInteger)textAnnotationIndexAtPoint:(NSPoint)p {
    for (NSInteger i = (NSInteger)_annotations.count - 1; i >= 0; i--) {
        NSDictionary *item = _annotations[(NSUInteger)i];
        if (![item[@"tool"] isEqualToString:@"text"]) {
            continue;
        }
        NSRect hitRect = NSInsetRect([self textAnnotationRectForItem:item], -6, -6);
        if (!NSIsEmptyRect(hitRect) && NSPointInRect(p, hitRect)) {
            return i;
        }
    }
    return -1;
}

- (void)drawAnnotations {
    NSMutableArray *items = [NSMutableArray arrayWithArray:_annotations];
    if (_draftAnnotation != nil) {
        [items addObject:_draftAnnotation];
    }
    for (NSUInteger index = 0; index < items.count; index++) {
        NSDictionary *item = items[index];
        NSString *tool = item[@"tool"];
        NSColor *color = item[@"nsColor"];
        NSArray *points = item[@"points"];
        if (points.count == 0) {
            continue;
        }
        if ([tool isEqualToString:@"text"]) {
            NSString *text = item[@"text"];
            if (text.length == 0) {
                continue;
            }
            NSPoint p = [points[0] pointValue];
            CGFloat fontSize = [self fontSizeForTextItem:item];
            NSDictionary *attrs = [self textAttributesWithFontSize:fontSize color:color];
            [text drawAtPoint:NSMakePoint(_selection.origin.x + p.x, _selection.origin.y + p.y) withAttributes:attrs];
            if ((NSInteger)index == _selectedTextAnnotationIndex && index < _annotations.count) {
                NSRect rect = NSInsetRect([self textAnnotationRectForItem:item], -4, -3);
                NSBezierPath *selectionPath = [NSBezierPath bezierPathWithRoundedRect:rect xRadius:4 yRadius:4];
                [selectionPath setLineWidth:1.5];
                CGFloat dash[] = {4.0, 3.0};
                [selectionPath setLineDash:dash count:2 phase:0];
                [[NSColor colorWithCalibratedRed:59.0/255.0 green:130.0/255.0 blue:246.0/255.0 alpha:0.95] setStroke];
                [selectionPath stroke];
            }
            continue;
        }
        if ([tool hasPrefix:@"mosaic-"]) {
            [NSGraphicsContext saveGraphicsState];
            NSBezierPath *clipPath = nil;
            if ([tool isEqualToString:@"mosaic-brush"]) {
                clipPath = [NSBezierPath bezierPath];
                CGFloat radius = [self strokeWidthForItem:item] / 2.0;
                for (NSUInteger i = 0; i < points.count; i++) {
                    NSPoint local = [points[i] pointValue];
                    NSPoint p = NSMakePoint(_selection.origin.x + local.x, _selection.origin.y + local.y);
                    [clipPath appendBezierPathWithOvalInRect:NSMakeRect(p.x - radius, p.y - radius, radius * 2, radius * 2)];
                    if (i == 0) continue;
                    NSPoint previousLocal = [points[i - 1] pointValue];
                    NSPoint previous = NSMakePoint(_selection.origin.x + previousLocal.x, _selection.origin.y + previousLocal.y);
                    CGFloat dx = p.x - previous.x, dy = p.y - previous.y;
                    CGFloat length = hypot(dx, dy);
                    if (length <= 0.001) continue;
                    CGFloat nx = -dy / length * radius, ny = dx / length * radius;
                    NSBezierPath *segment = [NSBezierPath bezierPath];
                    [segment moveToPoint:NSMakePoint(previous.x + nx, previous.y + ny)];
                    [segment lineToPoint:NSMakePoint(p.x + nx, p.y + ny)];
                    [segment lineToPoint:NSMakePoint(p.x - nx, p.y - ny)];
                    [segment lineToPoint:NSMakePoint(previous.x - nx, previous.y - ny)];
                    [segment closePath];
                    [clipPath appendBezierPath:segment];
                }
            } else if (points.count >= 2) {
                NSPoint a = [points[0] pointValue], b = [[points lastObject] pointValue];
                NSRect r = NSMakeRect(_selection.origin.x + MIN(a.x, b.x), _selection.origin.y + MIN(a.y, b.y), fabs(b.x-a.x), fabs(b.y-a.y));
                clipPath = [NSBezierPath bezierPathWithRect:r];
            }
            if (clipPath != nil) {
                [clipPath addClip];
                if (_mosaicPreviewImage != nil) {
                    NSDictionary *hints = @{NSImageHintInterpolation: @(NSImageInterpolationNone)};
                    [_mosaicPreviewImage drawInRect:self.bounds
                                          fromRect:NSMakeRect(0, 0, _mosaicPreviewImage.size.width, _mosaicPreviewImage.size.height)
                                         operation:NSCompositingOperationCopy
                                          fraction:1.0
                                    respectFlipped:YES
                                             hints:hints];
                } else {
                    // Screen capture can be unavailable before Screen Recording
                    // permission is granted. A checkerboard fallback still reads
                    // as pixelation and never resembles a marker stroke.
                    CGFloat tile = 8.0;
                    for (CGFloat y = 0; y < self.bounds.size.height; y += tile) {
                        for (CGFloat x = 0; x < self.bounds.size.width; x += tile) {
                            BOOL alternate = (((NSInteger)(x / tile) + (NSInteger)(y / tile)) % 2) == 0;
                            [[NSColor colorWithCalibratedWhite:(alternate ? 0.42 : 0.68) alpha:1.0] setFill];
                            NSRectFill(NSMakeRect(x, y, tile, tile));
                        }
                    }
                }
            }
            [NSGraphicsContext restoreGraphicsState];
            continue;
        }
        [color setStroke];
        CGFloat strokeWidth = [self strokeWidthForItem:item];
        NSBezierPath *path = [NSBezierPath bezierPath];
        [path setLineWidth:strokeWidth];
        [path setLineCapStyle:NSLineCapStyleRound];
        [path setLineJoinStyle:NSLineJoinStyleRound];
        if ([tool isEqualToString:@"pen"]) {
            NSPoint first = [points[0] pointValue];
            [path moveToPoint:NSMakePoint(_selection.origin.x + first.x, _selection.origin.y + first.y)];
            for (NSUInteger i = 1; i < points.count; i++) {
                NSPoint point = [points[i] pointValue];
                [path lineToPoint:NSMakePoint(_selection.origin.x + point.x, _selection.origin.y + point.y)];
            }
            [path stroke];
        } else if (points.count >= 2) {
            NSPoint a = [points[0] pointValue];
            NSPoint b = [[points lastObject] pointValue];
            NSPoint start = NSMakePoint(_selection.origin.x + a.x, _selection.origin.y + a.y);
            NSPoint end = NSMakePoint(_selection.origin.x + b.x, _selection.origin.y + b.y);
            NSRect r = NSMakeRect(
                _selection.origin.x + MIN(a.x, b.x),
                _selection.origin.y + MIN(a.y, b.y),
                fabs(b.x - a.x),
                fabs(b.y - a.y));
            if ([tool isEqualToString:@"line"] || [tool isEqualToString:@"arrow"]) {
                NSBezierPath *linePath = [NSBezierPath bezierPath];
                [linePath moveToPoint:start];
                [linePath lineToPoint:end];
                [linePath setLineWidth:strokeWidth];
                [linePath setLineCapStyle:NSLineCapStyleRound];
                [linePath setLineJoinStyle:NSLineJoinStyleRound];
                if ([tool isEqualToString:@"arrow"]) {
                    CGFloat dx = end.x - start.x, dy = end.y - start.y;
                    CGFloat length = hypot(dx, dy);
                    if (length >= 1.0) {
                        CGFloat headLength = MIN(length * 0.45, MAX(10.0, strokeWidth * 4.0));
                        CGFloat angle = atan2(dy, dx), spread = M_PI / 6.0;
                        NSPoint left = NSMakePoint(end.x - headLength * cos(angle - spread), end.y - headLength * sin(angle - spread));
                        NSPoint right = NSMakePoint(end.x - headLength * cos(angle + spread), end.y - headLength * sin(angle + spread));
                        [linePath moveToPoint:left];
                        [linePath lineToPoint:end];
                        [linePath lineToPoint:right];
                    }
                }
                [linePath stroke];
            } else if ([tool isEqualToString:@"rect"]) {
                NSBezierPath *rectPath = [NSBezierPath bezierPathWithRect:r];
                [rectPath setLineWidth:strokeWidth];
                [rectPath stroke];
            } else if ([tool isEqualToString:@"ellipse"]) {
                NSBezierPath *ellipsePath = [NSBezierPath bezierPathWithOvalInRect:r];
                [ellipsePath setLineWidth:strokeWidth];
                [ellipsePath stroke];
            }
        }
    }
}

- (NSString *)resizeHandleAtPoint:(NSPoint)p {
    if (!_hasSelection) {
        return nil;
    }
    CGFloat t = 9;
    NSDictionary *handles = @{
        @"nw": [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMinY(_selection))],
        @"n": [NSValue valueWithPoint:NSMakePoint(NSMidX(_selection), NSMinY(_selection))],
        @"ne": [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMinY(_selection))],
        @"e": [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMidY(_selection))],
        @"se": [NSValue valueWithPoint:NSMakePoint(NSMaxX(_selection), NSMaxY(_selection))],
        @"s": [NSValue valueWithPoint:NSMakePoint(NSMidX(_selection), NSMaxY(_selection))],
        @"sw": [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMaxY(_selection))],
        @"w": [NSValue valueWithPoint:NSMakePoint(NSMinX(_selection), NSMidY(_selection))]
    };
    for (NSString *key in handles) {
        NSPoint hp = [handles[key] pointValue];
        if (fabs(p.x - hp.x) <= t && fabs(p.y - hp.y) <= t) {
            return key;
        }
    }
    BOOL nearX = p.x >= NSMinX(_selection) - t && p.x <= NSMaxX(_selection) + t;
    BOOL nearY = p.y >= NSMinY(_selection) - t && p.y <= NSMaxY(_selection) + t;
    if (nearX && fabs(p.y - NSMinY(_selection)) <= t) return @"n";
    if (nearX && fabs(p.y - NSMaxY(_selection)) <= t) return @"s";
    if (nearY && fabs(p.x - NSMinX(_selection)) <= t) return @"w";
    if (nearY && fabs(p.x - NSMaxX(_selection)) <= t) return @"e";
    return nil;
}

- (NSPoint)localPoint:(NSPoint)p {
    return NSMakePoint(
        MAX(0, MIN(p.x - _selection.origin.x, _selection.size.width)),
        MAX(0, MIN(p.y - _selection.origin.y, _selection.size.height)));
}

// Translate a selection rectangle expressed in view-local coordinates into
// the global top-left screen coordinate system used by
// `/usr/sbin/screencapture -R`.
//
// Why this is needed:
//   - The overlay window is created with the host screen's AppKit frame and
//     its flipped content view yields top-left local coordinates relative
//     to that screen only.
//   - macOS combines all attached displays into a single virtual coordinate
//     space whose origin is the top-left corner of the primary display
//     (Y grows downward). `screencapture -R` interprets its arguments in
//     that space.
//   - Without this translation, a selection on a secondary display is sent
//     as if it were on the primary, so screencapture crops the wrong area.
//
// Translation steps:
//   1. globalX = screenFrame.origin.x + sel.origin.x
//      (NSScreen frame origin.x is already in primary-anchored global X.)
//   2. globalY = (primaryHeight - (screenFrame.origin.y + screenFrame.size.height)) + sel.origin.y
//      Converts the screen's AppKit bottom-left origin to a top-left global
//      origin, then adds the already-top-left local Y inside the view.
- (NSRect)globalRectForSelection:(NSRect)sel {
    NSScreen *screen = [nativeOverlayWindow screen];
    if (screen == nil) {
        screen = [NSScreen mainScreen];
    }
    if (screen == nil) {
        return sel;
    }
    NSRect screenFrame = [screen frame];
    NSScreen *primary = [[NSScreen screens] firstObject];
    CGFloat primaryHeight = primary != nil ? [primary frame].size.height : screenFrame.size.height;
    CGFloat globalX = screenFrame.origin.x + sel.origin.x;
    CGFloat globalY = (primaryHeight - (screenFrame.origin.y + screenFrame.size.height)) + sel.origin.y;
    return NSMakeRect(globalX, globalY, sel.size.width, sel.size.height);
}

- (void)mouseDown:(NSEvent *)event {
    NSPoint p = [self convertPoint:[event locationInWindow] fromView:nil];
    if (_textEditor != nil) {
        [self commitTextEditor];
    }
    _draggingTextAnnotation = NO;
    NSString *handle = [self resizeHandleAtPoint:p];
    if (handle != nil) {
        _resizing = YES;
        _creating = NO;
        _moving = NO;
        _annotating = NO;
        _resizeHandle = handle;
        _resizeStart = _selection;
        [self syncControls];
        return;
    }
    NSInteger textIndex = _hasSelection ? [self textAnnotationIndexAtPoint:p] : -1;
    if (textIndex >= 0) {
        _selectedTextAnnotationIndex = textIndex;
        NSDictionary *item = _annotations[(NSUInteger)textIndex];
        _activeTool = @"text";
        _activeColor = item[@"nsColor"] ?: _activeColor;
        _activeFontSize = [self fontSizeForTextItem:item];
        _creating = NO;
        _moving = NO;
        _resizing = NO;
        _annotating = NO;
        if ([event clickCount] >= 2) {
            [self beginEditingTextAnnotationAtIndex:textIndex];
            [self syncControls];
            [self setNeedsDisplay:YES];
            return;
        }
        NSArray *points = item[@"points"];
        if (points.count > 0) {
            _draggingTextAnnotation = YES;
            _textDragStartLocalPoint = [self localPoint:p];
            _textDragOriginalLocalPoint = [points[0] pointValue];
        }
        [self syncControls];
        [self setNeedsDisplay:YES];
        return;
    }
    _selectedTextAnnotationIndex = -1;
    if (_hasSelection && NSPointInRect(p, _selection) && [_activeTool isEqualToString:@"text"]) {
        _creating = NO;
        _moving = NO;
        _resizing = NO;
        _annotating = NO;
        [self beginTextAnnotationAtPoint:[self localPoint:p]];
        [self syncControls];
        return;
    }
    if ([event clickCount] == 2 && _hasSelection && NSPointInRect(p, _selection)) {
        [self copySelection];
        return;
    }
    if (_hasSelection && NSPointInRect(p, _selection) && _activeTool != nil) {
        _annotating = YES;
        _creating = NO;
        _moving = NO;
        _resizing = NO;
        NSPoint local = [self localPoint:p];
        _draftAnnotation = [@{
            @"tool": _activeTool,
            @"color": [self hexForColor:_activeColor],
            @"nsColor": _activeColor,
            @"strokeWidth": @([_activeTool isEqualToString:@"mosaic-brush"] ? _mosaicBrushWidth : _activeStrokeWidth),
            @"points": [NSMutableArray arrayWithObject:[NSValue valueWithPoint:local]]
        } mutableCopy];
    } else if (_hasSelection && NSPointInRect(p, _selection)) {
        _moving = YES;
        _creating = NO;
        _resizing = NO;
        _annotating = NO;
        _moveOffset = NSMakePoint(p.x - _selection.origin.x, p.y - _selection.origin.y);
    } else {
        _creating = YES;
        _moving = NO;
        _resizing = NO;
        _annotating = NO;
        _hasSelection = YES;
        _anchor = p;
        _selection = NSMakeRect(p.x, p.y, 0, 0);
        [_annotations removeAllObjects];
        _draftAnnotation = nil;
        _selectedTextAnnotationIndex = -1;
    }
    [self syncControls];
}

- (void)mouseDragged:(NSEvent *)event {
    NSPoint p = [self convertPoint:[event locationInWindow] fromView:nil];
    if (_creating) {
        CGFloat x = MIN(_anchor.x, p.x);
        CGFloat y = MIN(_anchor.y, p.y);
        _selection = NSMakeRect(x, y, fabs(p.x - _anchor.x), fabs(p.y - _anchor.y));
    } else if (_moving) {
        CGFloat x = p.x - _moveOffset.x;
        CGFloat y = p.y - _moveOffset.y;
        x = MAX(0, MIN(x, self.bounds.size.width - _selection.size.width));
        y = MAX(0, MIN(y, self.bounds.size.height - _selection.size.height));
        _selection.origin = NSMakePoint(x, y);
    } else if (_resizing) {
        CGFloat left = NSMinX(_resizeStart);
        CGFloat top = NSMinY(_resizeStart);
        CGFloat right = NSMaxX(_resizeStart);
        CGFloat bottom = NSMaxY(_resizeStart);
        if ([_resizeHandle containsString:@"w"]) left = p.x;
        if ([_resizeHandle containsString:@"e"]) right = p.x;
        if ([_resizeHandle containsString:@"n"]) top = p.y;
        if ([_resizeHandle containsString:@"s"]) bottom = p.y;
        left = MAX(0, MIN(left, self.bounds.size.width));
        right = MAX(0, MIN(right, self.bounds.size.width));
        top = MAX(0, MIN(top, self.bounds.size.height));
        bottom = MAX(0, MIN(bottom, self.bounds.size.height));
        _selection = NSMakeRect(MIN(left, right), MIN(top, bottom), fabs(right - left), fabs(bottom - top));
    } else if (_draggingTextAnnotation && _selectedTextAnnotationIndex >= 0 && _selectedTextAnnotationIndex < (NSInteger)_annotations.count) {
        NSMutableDictionary *item = (NSMutableDictionary *)_annotations[(NSUInteger)_selectedTextAnnotationIndex];
        NSMutableArray *points = (NSMutableArray *)item[@"points"];
        if (points.count > 0) {
            NSPoint local = [self localPoint:p];
            NSPoint delta = NSMakePoint(local.x - _textDragStartLocalPoint.x, local.y - _textDragStartLocalPoint.y);
            NSPoint next = NSMakePoint(_textDragOriginalLocalPoint.x + delta.x, _textDragOriginalLocalPoint.y + delta.y);
            NSString *text = item[@"text"] ?: @"";
            CGFloat fontSize = [self fontSizeForTextItem:item];
            points[0] = [NSValue valueWithPoint:[self clampedTextLocalPoint:next text:text fontSize:fontSize]];
        }
    } else if (_annotating && _draftAnnotation != nil) {
        NSMutableArray *points = _draftAnnotation[@"points"];
        NSPoint local = [self localPoint:p];
        if ([_activeTool isEqualToString:@"pen"] || [_activeTool isEqualToString:@"mosaic-brush"]) {
            [points addObject:[NSValue valueWithPoint:local]];
        } else {
            if (points.count == 1) {
                [points addObject:[NSValue valueWithPoint:local]];
            } else {
                points[1] = [NSValue valueWithPoint:local];
            }
        }
    }
    [self syncControls];
    [self setNeedsDisplay:YES];
}

- (void)mouseUp:(NSEvent *)event {
    _creating = NO;
    _moving = NO;
    _resizing = NO;
    _draggingTextAnnotation = NO;
    if (_annotating && _draftAnnotation != nil) {
        [_annotations addObject:_draftAnnotation];
        _draftAnnotation = nil;
    }
    _annotating = NO;
    if (_hasSelection && (_selection.size.width < 4 || _selection.size.height < 4)) {
        _hasSelection = NO;
    }
    [self syncControls];
    [self setNeedsDisplay:YES];
}

- (void)keyDown:(NSEvent *)event {
    if ([self isEditingText]) {
        if ([event keyCode] == 53 || [[event charactersIgnoringModifiers] isEqualToString:@"\033"]) {
            [self cancelTextEditor];
            return;
        }
        if ([event keyCode] == 36 || [[event charactersIgnoringModifiers] isEqualToString:@"\r"]) {
            [self commitTextEditor];
            return;
        }
    }
    if ([event keyCode] == 53 || [[event charactersIgnoringModifiers] isEqualToString:@"\033"]) {
        [self cancelSelection];
    } else if (([event keyCode] == 36 || [[event charactersIgnoringModifiers] isEqualToString:@"\r"]) && _hasSelection) {
        [self confirmSelection];
    } else {
        [super keyDown:event];
    }
}

- (void)rightMouseDown:(NSEvent *)event {
    [self cancelSelection];
}

- (void)syncControls {
    BOOL visible = _hasSelection && _selection.size.width >= 4 && _selection.size.height >= 4;
    [_cancelButton setHidden:!visible];
    [_clipboardButton setHidden:!visible];
    [_saveButton setHidden:!visible];
    [_saveRemoteButton setHidden:!visible];
    [_ftpButton setHidden:!visible];
    [_ocrButton setHidden:!visible];
    [_summaryButton setHidden:!visible];
    [_uploadButton setHidden:!visible];
    [_actionToolbarBg setHidden:!visible];
    [_penButton setHidden:!visible];
    [_lineButton setHidden:!visible];
    [_arrowButton setHidden:!visible];
    [_rectButton setHidden:!visible];
    [_ellipseButton setHidden:!visible];
    [_textButton setHidden:!visible];
    [_mosaicButton setHidden:!visible];
    [_undoButton setHidden:!visible];
    [_toolSettingsView setHidden:!visible || _activeTool == nil];
    [_sizeLabel setHidden:!visible];
    [_hintLabel setHidden:_hasSelection];

    if (!visible) {
        return;
    }

    [_sizeLabel setStringValue:[NSString stringWithFormat:@"%.0f × %.0f", _selection.size.width, _selection.size.height]];
    [_sizeLabel setFrame:NSMakeRect(_selection.origin.x, MAX(0, _selection.origin.y - 26), 110, 22)];

    // Action toolbar layout — 8 icon buttons, each 28x28, separated by 8px,
    // with 4px outer padding. Total = 8*28 + 7*8 + 2*4 = 288px wide.
    CGFloat actionBtnSize = 28;
    CGFloat actionGap = 8;
    CGFloat actionPad = 4;
    NSInteger actionCount = 8;
    CGFloat toolbarW = actionPad * 2 + actionBtnSize * actionCount + actionGap * (actionCount - 1);
    CGFloat toolbarH = 40;
    CGFloat x = _selection.origin.x + _selection.size.width - toolbarW;
    CGFloat y = _selection.origin.y + _selection.size.height + 8;
    if (y + toolbarH > self.bounds.size.height) {
        y = _selection.origin.y + _selection.size.height - toolbarH - 8;
    }
    x = MAX(0, MIN(x, self.bounds.size.width - toolbarW));

    [_actionToolbarBg setFrame:NSMakeRect(x, y, toolbarW, toolbarH)];

    CGFloat btnY = y + (toolbarH - actionBtnSize) / 2;
    CGFloat baseX = x + actionPad;
    [_cancelButton     setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 0, btnY, actionBtnSize, actionBtnSize)];
    [_clipboardButton  setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 1, btnY, actionBtnSize, actionBtnSize)];
    [_saveButton       setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 2, btnY, actionBtnSize, actionBtnSize)];
    [_saveRemoteButton setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 3, btnY, actionBtnSize, actionBtnSize)];
    [_ftpButton        setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 4, btnY, actionBtnSize, actionBtnSize)];
    [_ocrButton        setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 5, btnY, actionBtnSize, actionBtnSize)];
    [_summaryButton    setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 6, btnY, actionBtnSize, actionBtnSize)];
    [_uploadButton     setFrame:NSMakeRect(baseX + (actionBtnSize + actionGap) * 7, btnY, actionBtnSize, actionBtnSize)];

    // Mark toolbar sits to the LEFT of the action toolbar (same row) with an
    // 8px gap between the two groups, so they never overlap on tiny selections.
    CGFloat markW = 280;
    CGFloat markGap = 8;
    CGFloat markX = MAX(0, x - markGap - markW);
    [_penButton setFrame:NSMakeRect(markX + 4, y + 4, 28, 28)];
    [_lineButton setFrame:NSMakeRect(markX + 38, y + 4, 28, 28)];
    [_arrowButton setFrame:NSMakeRect(markX + 72, y + 4, 28, 28)];
    [_rectButton setFrame:NSMakeRect(markX + 106, y + 4, 28, 28)];
    [_ellipseButton setFrame:NSMakeRect(markX + 140, y + 4, 28, 28)];
    [_textButton setFrame:NSMakeRect(markX + 174, y + 4, 28, 28)];
    [_mosaicButton setFrame:NSMakeRect(markX + 208, y + 4, 28, 28)];
    [_undoButton setFrame:NSMakeRect(markX + 246, y + 4, 28, 28)];
    [_undoButton setEnabled:YES];
    [[_undoButton layer] setOpacity:_annotations.count > 0 ? 1.0 : 0.35];

    if (_activeTool != nil) {
        BOOL isText = [_activeTool isEqualToString:@"text"];
        BOOL isMosaic = [_activeTool hasPrefix:@"mosaic-"];
        BOOL mosaicBrush = [_mosaicMode isEqualToString:@"brush"];
        CGFloat settingsW = isMosaic ? (mosaicBrush ? 304 : 112) : (isText ? 462 : 398);
        CGFloat settingsH = 58;
        CGFloat settingsX = MAX(8, MIN(markX, self.bounds.size.width - settingsW - 8));
        CGFloat settingsY = y + toolbarH + 4;
        if (settingsY + settingsH > self.bounds.size.height) {
            settingsY = y - settingsH - 8;
        }
        CGFloat activeCenter = markX + 18;
        if ([_activeTool isEqualToString:@"line"]) activeCenter = markX + 52;
        if ([_activeTool isEqualToString:@"arrow"]) activeCenter = markX + 86;
        if ([_activeTool isEqualToString:@"rect"]) activeCenter = markX + 120;
        if ([_activeTool isEqualToString:@"ellipse"]) activeCenter = markX + 154;
        if ([_activeTool isEqualToString:@"text"]) activeCenter = markX + 188;
        if (isMosaic) activeCenter = markX + 222;
        [_toolSettingsView setFrame:NSMakeRect(settingsX, settingsY, settingsW, settingsH)];
        [_toolSettingsView setArrowX:MAX(18, MIN(activeCenter - settingsX, settingsW - 18))];
        [_toolSettingsView setNeedsDisplay:YES];

        CGFloat contentY = 18;
        CGFloat xCursor = 14;
        for (NSButton *button in _strokeSettingButtons) {
            [button setHidden:isText || isMosaic];
            [button setFrame:NSMakeRect(xCursor, contentY, 32, 32)];
            xCursor += 42;
        }
        xCursor = 14;
        for (NSButton *button in _fontSettingButtons) {
            [button setHidden:!isText || isMosaic];
            [button setFrame:NSMakeRect(xCursor, contentY, 40, 32)];
            xCursor += 48;
        }
        for (NSUInteger i = 0; i < _mosaicModeButtons.count; i++) {
            NSButton *button = _mosaicModeButtons[i];
            [button setHidden:!isMosaic];
            [button setFrame:NSMakeRect(14 + i * 38, contentY + 1, 36, 30)];
        }
        for (NSUInteger i = 0; i < _mosaicWidthButtons.count; i++) {
            NSButton *button = _mosaicWidthButtons[i];
            [button setHidden:!isMosaic || !mosaicBrush];
            [button setFrame:NSMakeRect(122 + i * 42, contentY, 32, 32)];
        }
        CGFloat groupW = isText ? (4 * 40 + 3 * 8) : (3 * 32 + 2 * 10);
        CGFloat dividerX = 14 + groupW + 12;
        [_settingsDivider setHidden:isMosaic && !mosaicBrush];
        if (isMosaic) dividerX = 102;
        [_settingsDivider setFrame:NSMakeRect(dividerX, contentY + 3, 1, 26)];
        CGFloat colorX = dividerX + 18;
        for (NSButton *button in _colorSettingButtons) {
            [button setHidden:isMosaic];
            [button setFrame:NSMakeRect(colorX, contentY + 5, 22, 22)];
            colorX += 34;
        }
    }
    [self updateToolButtonStates];
}

- (void)updateToolButtonStates {
    NSDictionary *buttons = @{@"pen": _penButton, @"line": _lineButton, @"arrow": _arrowButton, @"rect": _rectButton, @"ellipse": _ellipseButton, @"text": _textButton};
    for (NSString *tool in buttons) {
        NSButton *button = buttons[tool];
        NSColor *bg = [tool isEqualToString:_activeTool]
            ? [NSColor colorWithCalibratedWhite:1.0 alpha:0.14]
            : [NSColor clearColor];
        [[button layer] setBackgroundColor:[bg CGColor]];
    }
    BOOL mosaicActive = [_activeTool hasPrefix:@"mosaic-"];
    [[_mosaicButton layer] setBackgroundColor:[(mosaicActive ? [NSColor colorWithCalibratedWhite:1.0 alpha:0.14] : [NSColor clearColor]) CGColor]];
    [self updateToolSettingsStates];
}

- (void)updateToolSettingsStates {
    NSColor *activeBg = [NSColor colorWithCalibratedRed:234.0/255.0 green:241.0/255.0 blue:1.0 alpha:1.0];
    NSColor *clear = [NSColor clearColor];
    NSColor *activeFg = [NSColor colorWithCalibratedRed:37.0/255.0 green:99.0/255.0 blue:235.0/255.0 alpha:1.0];
    NSColor *normalFg = [NSColor colorWithCalibratedWhite:0.12 alpha:1.0];

    for (NSButton *button in _strokeSettingButtons) {
        BOOL active = fabs((CGFloat)button.tag - _activeStrokeWidth) < 0.1;
        [[button layer] setBackgroundColor:[(active ? activeBg : clear) CGColor]];
        NSMutableAttributedString *title = [[button attributedTitle] mutableCopy];
        if (title.length > 0) {
            [title addAttribute:NSForegroundColorAttributeName value:(active ? activeFg : normalFg) range:NSMakeRange(0, title.length)];
            [button setAttributedTitle:title];
        }
    }
    for (NSButton *button in _fontSettingButtons) {
        BOOL active = fabs((CGFloat)button.tag - _activeFontSize) < 0.1;
        [[button layer] setBackgroundColor:[(active ? activeBg : clear) CGColor]];
        NSMutableAttributedString *title = [[button attributedTitle] mutableCopy];
        if (title.length > 0) {
            [title addAttribute:NSForegroundColorAttributeName value:(active ? activeFg : normalFg) range:NSMakeRange(0, title.length)];
            [button setAttributedTitle:title];
        }
    }
    for (NSButton *button in _mosaicModeButtons) {
        BOOL active = (button.tag == 0 && [_mosaicMode isEqualToString:@"brush"]) || (button.tag == 1 && [_mosaicMode isEqualToString:@"rect"]);
        [self styleButton:button background:(active ? [NSColor whiteColor] : clear) foreground:(active ? activeFg : normalFg)];
        if (@available(macOS 10.14, *)) {
            [button setContentTintColor:(active ? activeFg : normalFg)];
        }
        [button setAccessibilityValue:(active ? @"已选择" : @"未选择")];
    }
    for (NSButton *button in _mosaicWidthButtons) {
        BOOL active = fabs((CGFloat)button.tag - _mosaicBrushWidth) < 0.1;
        [[button layer] setBackgroundColor:[(active ? activeBg : clear) CGColor]];
        NSMutableAttributedString *title = [[button attributedTitle] mutableCopy];
        if (title.length > 0) {
            [title addAttribute:NSForegroundColorAttributeName value:(active ? activeFg : normalFg) range:NSMakeRange(0, title.length)];
            [button setAttributedTitle:title];
        }
    }

    NSString *activeHex = [self hexForColor:_activeColor];
    NSArray *colors = objc_getAssociatedObject(_toolSettingsView, "snapgoColors");
    for (NSUInteger i = 0; i < _colorSettingButtons.count; i++) {
        NSButton *button = _colorSettingButtons[i];
        NSString *hex = i < colors.count ? [self hexForColor:colors[i]] : @"";
        BOOL active = [hex isEqualToString:activeHex];
        [[button layer] setBorderWidth:active ? 2 : 1];
        [[button layer] setBorderColor:[(active ? activeFg : [NSColor colorWithCalibratedWhite:0.12 alpha:0.22]) CGColor]];
    }
}

- (void)selectTool:(NSString *)tool {
    _activeTool = tool;
    [self syncControls];
}
- (void)selectPen { [self selectTool:@"pen"]; }
- (void)selectLine { [self selectTool:@"line"]; }
- (void)selectArrow { [self selectTool:@"arrow"]; }
- (void)selectRect { [self selectTool:@"rect"]; }
- (void)selectEllipse { [self selectTool:@"ellipse"]; }
- (void)selectText { [self selectTool:@"text"]; }
- (void)selectMosaic { [self selectTool:[_mosaicMode isEqualToString:@"brush"] ? @"mosaic-brush" : @"mosaic-rect"]; }
- (void)undoAnnotation {
    if (_annotations.count == 0 && _textEditor == nil) {
        return;
    }
    [self cancelTextEditor];
    if (_annotations.count == 0) {
        [self syncControls];
        [self setNeedsDisplay:YES];
        return;
    }
    [_annotations removeLastObject];
    if (_selectedTextAnnotationIndex >= (NSInteger)_annotations.count) {
        _selectedTextAnnotationIndex = -1;
    }
    [self syncControls];
    [self setNeedsDisplay:YES];
}

- (void)beginTextAnnotationAtPoint:(NSPoint)localPoint {
    [self beginTextEditorAtLocalPoint:localPoint text:@"" color:_activeColor annotationIndex:-1];
}

- (void)beginEditingTextAnnotationAtIndex:(NSInteger)index {
    if (index < 0 || index >= (NSInteger)_annotations.count) {
        return;
    }
    NSDictionary *item = _annotations[(NSUInteger)index];
    if (![item[@"tool"] isEqualToString:@"text"]) {
        return;
    }
    NSArray *points = item[@"points"];
    if (points.count == 0) {
        return;
    }
    NSColor *color = item[@"nsColor"] ?: _activeColor;
    _activeColor = color;
    _activeFontSize = [self fontSizeForTextItem:item];
    [self beginTextEditorAtLocalPoint:[points[0] pointValue]
                                 text:item[@"text"] ?: @""
                                color:color
                      annotationIndex:index];
}

- (void)beginTextEditorAtLocalPoint:(NSPoint)localPoint text:(NSString *)text color:(NSColor *)color annotationIndex:(NSInteger)index {
    [self cancelTextEditor];
    CGFloat fontSize = _activeFontSize;
    if (index >= 0 && index < (NSInteger)_annotations.count) {
        fontSize = [self fontSizeForTextItem:_annotations[(NSUInteger)index]];
        _activeFontSize = fontSize;
    }
    NSPoint clampedLocal = [self clampedTextLocalPoint:localPoint text:text fontSize:fontSize];
    _textEditorLocalPoint = clampedLocal;
    _textEditorAnnotationIndex = index;
    _textEditorColor = color ?: _activeColor;

    NSRect frame = [self textEditorFrameForLocalPoint:clampedLocal text:text fontSize:fontSize];
    _textEditorLocalPoint = [self localPoint:frame.origin];

    _textEditor = [[NSTextField alloc] initWithFrame:frame];
    [_textEditor setBezeled:YES];
    [_textEditor setBordered:YES];
    [_textEditor setDrawsBackground:YES];
    [_textEditor setBackgroundColor:[NSColor colorWithCalibratedWhite:0.08 alpha:0.78]];
    [_textEditor setTextColor:_textEditorColor];
    [_textEditor setFont:[NSFont systemFontOfSize:fontSize weight:NSFontWeightSemibold]];
    [_textEditor setStringValue:text ?: @""];
    [_textEditor setFocusRingType:NSFocusRingTypeNone];
    [_textEditor setTarget:self];
    [_textEditor setAction:@selector(commitTextEditorFromSender:)];
    [self addSubview:_textEditor];
    [[self window] makeFirstResponder:_textEditor];
    [_textEditor selectText:nil];
}

- (BOOL)isEditingText {
    return _textEditor != nil;
}

- (void)commitTextEditorFromSender:(id)sender {
    [self commitTextEditor];
}

- (void)commitTextEditor {
    if (_textEditor == nil) {
        return;
    }
    NSString *text = [[_textEditor stringValue] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    NSColor *textColor = _textEditorColor ?: _activeColor;
    if (_textEditorAnnotationIndex >= 0 && _textEditorAnnotationIndex < (NSInteger)_annotations.count) {
        if (text.length > 0) {
            NSMutableDictionary *item = (NSMutableDictionary *)_annotations[(NSUInteger)_textEditorAnnotationIndex];
            item[@"color"] = [self hexForColor:textColor];
            item[@"nsColor"] = textColor;
            item[@"points"] = [NSMutableArray arrayWithObject:[NSValue valueWithPoint:_textEditorLocalPoint]];
            item[@"text"] = text;
            item[@"fontSize"] = @(_activeFontSize);
            _selectedTextAnnotationIndex = _textEditorAnnotationIndex;
        } else {
            [_annotations removeObjectAtIndex:(NSUInteger)_textEditorAnnotationIndex];
            _selectedTextAnnotationIndex = -1;
        }
    } else if (text.length > 0) {
        [_annotations addObject:[@{
            @"tool": @"text",
            @"color": [self hexForColor:textColor],
            @"nsColor": textColor,
            @"points": [NSMutableArray arrayWithObject:[NSValue valueWithPoint:_textEditorLocalPoint]],
            @"text": text,
            @"fontSize": @(_activeFontSize)
        } mutableCopy]];
        _selectedTextAnnotationIndex = (NSInteger)_annotations.count - 1;
    }
    [_textEditor removeFromSuperview];
    _textEditor = nil;
    _textEditorAnnotationIndex = -1;
    _textEditorColor = nil;
    [[self window] makeFirstResponder:self];
    [self syncControls];
    [self setNeedsDisplay:YES];
}

- (void)cancelTextEditor {
    if (_textEditor == nil) {
        return;
    }
    [_textEditor removeFromSuperview];
    _textEditor = nil;
    _textEditorAnnotationIndex = -1;
    _textEditorColor = nil;
    [[self window] makeFirstResponder:self];
    [self setNeedsDisplay:YES];
}

- (void)selectStrokeWidth:(NSButton *)sender {
    _activeStrokeWidth = MAX(1.0, (CGFloat)sender.tag);
    [self updateToolSettingsStates];
}

- (void)selectMosaicMode:(NSButton *)sender {
    _mosaicMode = sender.tag == 0 ? @"brush" : @"rect";
    [self selectMosaic];
}

- (void)selectMosaicWidth:(NSButton *)sender {
    _mosaicBrushWidth = MAX(8.0, (CGFloat)sender.tag);
    [self updateToolSettingsStates];
}

- (void)selectFontSize:(NSButton *)sender {
    _activeFontSize = MAX(8.0, (CGFloat)sender.tag);
    if (_textEditor != nil) {
        [_textEditor setFont:[NSFont systemFontOfSize:_activeFontSize weight:NSFontWeightSemibold]];
        [self resizeTextEditorForCurrentFont];
    } else if ([_activeTool isEqualToString:@"text"] && _selectedTextAnnotationIndex >= 0 && _selectedTextAnnotationIndex < (NSInteger)_annotations.count) {
        NSMutableDictionary *item = (NSMutableDictionary *)_annotations[(NSUInteger)_selectedTextAnnotationIndex];
        item[@"fontSize"] = @(_activeFontSize);
        NSMutableArray *points = (NSMutableArray *)item[@"points"];
        if (points.count > 0) {
            NSString *text = item[@"text"] ?: @"";
            NSPoint p = [points[0] pointValue];
            points[0] = [NSValue valueWithPoint:[self clampedTextLocalPoint:p text:text fontSize:_activeFontSize]];
        }
        [self setNeedsDisplay:YES];
    }
    [self syncControls];
}

- (void)selectToolColor:(NSButton *)sender {
    NSArray *colors = objc_getAssociatedObject(_toolSettingsView, "snapgoColors");
    if (sender.tag >= 0 && sender.tag < (NSInteger)colors.count) {
        _activeColor = colors[(NSUInteger)sender.tag];
        if (_textEditor != nil) {
            _textEditorColor = _activeColor;
            [_textEditor setTextColor:_activeColor];
        } else if ([_activeTool isEqualToString:@"text"] && _selectedTextAnnotationIndex >= 0 && _selectedTextAnnotationIndex < (NSInteger)_annotations.count) {
            NSMutableDictionary *item = (NSMutableDictionary *)_annotations[(NSUInteger)_selectedTextAnnotationIndex];
            item[@"color"] = [self hexForColor:_activeColor];
            item[@"nsColor"] = _activeColor;
            [self setNeedsDisplay:YES];
        }
        [self updateToolSettingsStates];
    }
}

- (NSString *)annotationsJSON {
    [self commitTextEditor];
    NSMutableArray *payload = [NSMutableArray array];
    for (NSDictionary *item in _annotations) {
        NSMutableArray *points = [NSMutableArray array];
        for (NSValue *value in item[@"points"]) {
            NSPoint p = [value pointValue];
            [points addObject:@{@"x": @(p.x), @"y": @(p.y)}];
        }
        NSMutableDictionary *entry = [@{@"tool": item[@"tool"], @"color": item[@"color"], @"points": points} mutableCopy];
        NSString *text = item[@"text"];
        if (text.length > 0) {
            entry[@"text"] = text;
            entry[@"fontSize"] = item[@"fontSize"] ?: @20.0;
        } else {
            entry[@"strokeWidth"] = item[@"strokeWidth"] ?: @3.0;
        }
        [payload addObject:entry];
    }
    NSData *data = [NSJSONSerialization dataWithJSONObject:payload options:0 error:nil];
    if (data == nil) {
        return @"[]";
    }
    return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}

- (void)closeOverlayWindow {
    [nativeOverlayWindow orderOut:nil];
    if (nativeOverlayKeyMonitor != nil) {
        [NSEvent removeMonitor:nativeOverlayKeyMonitor];
        nativeOverlayKeyMonitor = nil;
    }
    nativeOverlayWindow = nil;
}

- (void)confirmSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlayConfirm((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}

- (void)copySelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlayCopy((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}

- (void)saveSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];

    NSOpenPanel *panel = [NSOpenPanel openPanel];
    [panel setTitle:@"Save screenshot to folder"];
    [panel setCanChooseFiles:NO];
    [panel setCanChooseDirectories:YES];
    [panel setAllowsMultipleSelection:NO];
    [panel setCanCreateDirectories:YES];
    [panel beginWithCompletionHandler:^(NSModalResponse result) {
        if (result != NSModalResponseOK || [panel URL] == nil) {
            nativeOverlayCancel();
            return;
        }
        NSString *dir = [[panel URL] path];
        nativeOverlaySave((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String], [dir UTF8String]);
    }];
}

- (void)cancelSelection {
    [self cancelTextEditor];
    [self closeOverlayWindow];
    nativeOverlayCancel();
}

// `saveRemoteSelection` triggers the SCP upload flow. The overlay closes
// immediately so the user can keep working while the transfer runs in the
// background; success / failure surfaces through the regular Toast events.
- (void)saveRemoteSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlaySaveRemote((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}

// `uploadFTPSelection` dispatches the dedicated FTP/SFTP upload action.
- (void)uploadFTPSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlayUploadFTP((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}

// `ocrSelection` sends the screenshot to the configured OCR provider and
// copies the extracted text.
- (void)ocrSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlayOCR((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}

// `summarizeSelection` uploads the screenshot to S3, sends it to the
// configured multimodal model, and copies the generated summary.
- (void)summarizeSelection {
    if (!_hasSelection) {
        return;
    }
    NSRect r = [self globalRectForSelection:_selection];
    NSString *json = [self annotationsJSON];
    [self closeOverlayWindow];
    nativeOverlaySummarize((int)llround(r.origin.x), (int)llround(r.origin.y), (int)llround(r.size.width), (int)llround(r.size.height), [json UTF8String]);
}
@end

// screenContainingCursor returns the NSScreen the cursor is currently on,
// falling back to the main screen and then the first attached screen.
//
// Rationale: when an external display is attached, users expect the capture
// overlay to appear on whichever display they were just working on.
// `[NSEvent mouseLocation]` reports the cursor in the same global Cocoa
// (bottom-left-origin) screen space used by `NSScreen.frame`, so a simple
// `NSPointInRect` test against each screen's frame yields the right one.
// Iteration over `[NSScreen screens]` is cheap (typically <=4 displays).
static NSScreen *snipScreenContainingCursor(void) {
    NSPoint cursor = [NSEvent mouseLocation];
    for (NSScreen *candidate in [NSScreen screens]) {
        if (NSPointInRect(cursor, [candidate frame])) {
            return candidate;
        }
    }
    NSScreen *fallback = [NSScreen mainScreen];
    if (fallback != nil) {
        return fallback;
    }
    return [[NSScreen screens] firstObject];
}

// snipMosaicPreviewImage captures the target display before the transparent
// overlay becomes visible, then downsamples it to one sample per 10 logical
// points. The view scales this tiny image back with nearest-neighbour
// interpolation inside each mosaic mask, yielding stable, screen-derived
// pixel blocks while the pointer is moving.
static NSImage *snipMosaicPreviewImage(NSScreen *screen) {
    NSSize fullSize = [screen frame].size;
    NSUInteger screenIndex = [[NSScreen screens] indexOfObjectIdenticalTo:screen];
    if (screenIndex == NSNotFound) screenIndex = 0;
    NSString *temporaryPath = [NSTemporaryDirectory() stringByAppendingPathComponent:
        [NSString stringWithFormat:@"snapgo-mosaic-%@.png", [[NSUUID UUID] UUIDString]]];
    NSTask *captureTask = [[NSTask alloc] init];
    [captureTask setExecutableURL:[NSURL fileURLWithPath:@"/usr/sbin/screencapture"]];
    [captureTask setArguments:@[@"-x", @"-D", [NSString stringWithFormat:@"%lu", (unsigned long)screenIndex + 1], temporaryPath]];
    NSError *launchError = nil;
    if (![captureTask launchAndReturnError:&launchError]) return nil;
    [captureTask waitUntilExit];
    NSImage *fullImage = [[NSImage alloc] initWithContentsOfFile:temporaryPath];
    [[NSFileManager defaultManager] removeItemAtPath:temporaryPath error:nil];
    if ([captureTask terminationStatus] != 0 || fullImage == nil) return nil;

    NSInteger pixelW = MAX(1, (NSInteger)ceil(fullSize.width / 10.0));
    NSInteger pixelH = MAX(1, (NSInteger)ceil(fullSize.height / 10.0));
    NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc]
        initWithBitmapDataPlanes:NULL
                      pixelsWide:pixelW
                      pixelsHigh:pixelH
                   bitsPerSample:8
                 samplesPerPixel:4
                        hasAlpha:YES
                        isPlanar:NO
                  colorSpaceName:NSCalibratedRGBColorSpace
                     bytesPerRow:0
                    bitsPerPixel:0];
    if (bitmap == nil) return nil;

    NSGraphicsContext *context = [NSGraphicsContext graphicsContextWithBitmapImageRep:bitmap];
    [NSGraphicsContext saveGraphicsState];
    [NSGraphicsContext setCurrentContext:context];
    [context setImageInterpolation:NSImageInterpolationHigh];
    [fullImage drawInRect:NSMakeRect(0, 0, pixelW, pixelH)
                 fromRect:NSMakeRect(0, 0, fullSize.width, fullSize.height)
                operation:NSCompositingOperationCopy
                 fraction:1.0
           respectFlipped:NO
                    hints:nil];
    [context flushGraphics];
    [NSGraphicsContext restoreGraphicsState];

    NSImage *result = [[NSImage alloc] initWithSize:NSMakeSize(pixelW, pixelH)];
    [result addRepresentation:bitmap];
    return result;
}

static void snipShowNativeOverlay(int width, int height) {
    dispatch_async(dispatch_get_main_queue(), ^{
        NSScreen *screen = snipScreenContainingCursor();
        if (screen == nil) {
            nativeOverlayCancel();
            return;
        }

        NSRect frame = [screen frame];
        NSImage *mosaicPreview = snipMosaicPreviewImage(screen);
        [NSApp activateIgnoringOtherApps:YES];

        nativeOverlayWindow = [[SnipNativeOverlayPanel alloc]
            initWithContentRect:frame
                      styleMask:NSWindowStyleMaskBorderless
                        backing:NSBackingStoreBuffered
                          defer:NO];
        [nativeOverlayWindow setOpaque:NO];
        [nativeOverlayWindow setBackgroundColor:[NSColor clearColor]];
        [nativeOverlayWindow setLevel:NSScreenSaverWindowLevel];
        [nativeOverlayWindow setHidesOnDeactivate:NO];
        [(NSPanel *)nativeOverlayWindow setFloatingPanel:YES];
        [nativeOverlayWindow setCollectionBehavior:
            NSWindowCollectionBehaviorCanJoinAllSpaces |
            NSWindowCollectionBehaviorFullScreenAuxiliary |
            NSWindowCollectionBehaviorStationary];
        [nativeOverlayWindow setIgnoresMouseEvents:NO];

        SnipNativeOverlayView *view = [[SnipNativeOverlayView alloc]
            initWithFrame:NSMakeRect(0, 0, frame.size.width, frame.size.height)];
        [view setMosaicPreviewImage:mosaicPreview];
        [nativeOverlayWindow setContentView:view];
        [nativeOverlayWindow makeKeyAndOrderFront:nil];
        [nativeOverlayWindow makeFirstResponder:view];

        nativeOverlayKeyMonitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSEventMaskKeyDown handler:^NSEvent *(NSEvent *event) {
            if ([event keyCode] == 53) {
                if ([view isEditingText]) {
                    [view cancelTextEditor];
                    return nil;
                }
                [view cancelSelection];
                return nil;
            }
            if ([event keyCode] == 36 && [view hasSelection]) {
                if ([view isEditingText]) {
                    [view commitTextEditor];
                    return nil;
                }
                [view confirmSelection];
                return nil;
            }
            return event;
        }];
    });
}
*/
import "C"
import (
	"sync"

	"github.com/mmmy/snapgo/internal/infrastructure/display"
)

var nativeOverlayState struct {
	sync.Mutex
	app *App
}

// showNativeCaptureOverlay uses a macOS-native transparent panel instead of
// the Wails WebView overlay, avoiding WKWebView's opaque grey backing layer.
func showNativeCaptureOverlay(app *App, info display.Info) bool {
	nativeOverlayState.Lock()
	nativeOverlayState.app = app
	nativeOverlayState.Unlock()
	C.snipShowNativeOverlay(C.int(info.CSSWidth), C.int(info.CSSHeight))
	return true
}