393 lines
13 KiB
Text
393 lines
13 KiB
Text
// Copyright (c) 2017 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/browser/native_browser_view_mac.h"
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#import <objc/runtime.h>
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#include <vector>
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#include "shell/browser/ui/drag_util.h"
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#include "shell/browser/ui/inspectable_web_contents.h"
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#include "shell/browser/ui/inspectable_web_contents_view.h"
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#include "skia/ext/skia_utils_mac.h"
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#include "ui/gfx/geometry/rect.h"
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// Match view::Views behavior where the view sticks to the top-left origin.
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const NSAutoresizingMaskOptions kDefaultAutoResizingMask =
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NSViewMaxXMargin | NSViewMinYMargin;
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@interface DragRegionView : NSView
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@property(assign) NSPoint initialLocation;
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@end
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@interface NSWindow ()
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- (void)performWindowDragWithEvent:(NSEvent*)event;
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@end
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@implementation DragRegionView
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@synthesize initialLocation;
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+ (void)load {
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if (getenv("ELECTRON_DEBUG_DRAG_REGIONS")) {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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SEL originalSelector = @selector(drawRect:);
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SEL swizzledSelector = @selector(drawDebugRect:);
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Method originalMethod =
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class_getInstanceMethod([self class], originalSelector);
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Method swizzledMethod =
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class_getInstanceMethod([self class], swizzledSelector);
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BOOL didAddMethod =
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class_addMethod([self class], originalSelector,
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method_getImplementation(swizzledMethod),
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method_getTypeEncoding(swizzledMethod));
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if (didAddMethod) {
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class_replaceMethod([self class], swizzledSelector,
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method_getImplementation(originalMethod),
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method_getTypeEncoding(originalMethod));
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} else {
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method_exchangeImplementations(originalMethod, swizzledMethod);
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}
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});
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}
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}
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- (BOOL)mouseDownCanMoveWindow {
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return
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[self.window respondsToSelector:@selector(performWindowDragWithEvent:)];
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}
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- (BOOL)acceptsFirstMouse:(NSEvent*)event {
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return YES;
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}
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- (BOOL)shouldIgnoreMouseEvent {
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NSEventType type = [[NSApp currentEvent] type];
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return type != NSEventTypeLeftMouseDragged &&
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type != NSEventTypeLeftMouseDown;
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}
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- (NSView*)hitTest:(NSPoint)point {
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// Pass-through events that hit one of the exclusion zones
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for (NSView* exclusion_zones in [self subviews]) {
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if ([exclusion_zones hitTest:point])
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return nil;
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}
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return self;
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}
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- (void)mouseDown:(NSEvent*)event {
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[super mouseDown:event];
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if ([self.window respondsToSelector:@selector(performWindowDragWithEvent:)]) {
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// According to Google, using performWindowDragWithEvent:
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// does not generate a NSWindowWillMoveNotification. Hence post one.
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[[NSNotificationCenter defaultCenter]
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postNotificationName:NSWindowWillMoveNotification
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object:self];
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[self.window performWindowDragWithEvent:event];
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return;
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}
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if (self.window.styleMask & NSWindowStyleMaskFullScreen) {
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return;
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}
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self.initialLocation = [event locationInWindow];
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}
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- (void)mouseDragged:(NSEvent*)event {
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if ([self.window respondsToSelector:@selector(performWindowDragWithEvent:)]) {
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return;
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}
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if (self.window.styleMask & NSWindowStyleMaskFullScreen) {
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return;
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}
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NSPoint currentLocation = [NSEvent mouseLocation];
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NSPoint newOrigin;
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NSRect screenFrame = [[NSScreen mainScreen] frame];
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NSSize screenSize = screenFrame.size;
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NSRect windowFrame = [self.window frame];
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NSSize windowSize = windowFrame.size;
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newOrigin.x = currentLocation.x - self.initialLocation.x;
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newOrigin.y = currentLocation.y - self.initialLocation.y;
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BOOL inMenuBar = (newOrigin.y + windowSize.height) >
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(screenFrame.origin.y + screenSize.height);
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BOOL screenAboveMainScreen = false;
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if (inMenuBar) {
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for (NSScreen* screen in [NSScreen screens]) {
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NSRect currentScreenFrame = [screen frame];
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BOOL isHigher = currentScreenFrame.origin.y > screenFrame.origin.y;
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// If there's another screen that is generally above the current screen,
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// we'll draw a new rectangle that is just above the current screen. If
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// the "higher" screen intersects with this rectangle, we'll allow drawing
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// above the menubar.
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if (isHigher) {
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NSRect aboveScreenRect =
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NSMakeRect(screenFrame.origin.x,
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screenFrame.origin.y + screenFrame.size.height - 10,
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screenFrame.size.width, 200);
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BOOL screenAboveIntersects =
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NSIntersectsRect(currentScreenFrame, aboveScreenRect);
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if (screenAboveIntersects) {
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screenAboveMainScreen = true;
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break;
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}
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}
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}
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}
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// Don't let window get dragged up under the menu bar
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if (inMenuBar && !screenAboveMainScreen) {
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newOrigin.y = screenFrame.origin.y +
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(screenFrame.size.height - windowFrame.size.height);
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}
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// Move the window to the new location
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[self.window setFrameOrigin:newOrigin];
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}
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// For debugging purposes only.
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- (void)drawDebugRect:(NSRect)aRect {
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[[[NSColor greenColor] colorWithAlphaComponent:0.5] set];
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NSRectFill([self bounds]);
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}
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@end
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@interface ExcludeDragRegionView : NSView
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@end
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@implementation ExcludeDragRegionView
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+ (void)load {
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if (getenv("ELECTRON_DEBUG_DRAG_REGIONS")) {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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SEL originalSelector = @selector(drawRect:);
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SEL swizzledSelector = @selector(drawDebugRect:);
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Method originalMethod =
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class_getInstanceMethod([self class], originalSelector);
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Method swizzledMethod =
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class_getInstanceMethod([self class], swizzledSelector);
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BOOL didAddMethod =
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class_addMethod([self class], originalSelector,
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method_getImplementation(swizzledMethod),
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method_getTypeEncoding(swizzledMethod));
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if (didAddMethod) {
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class_replaceMethod([self class], swizzledSelector,
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method_getImplementation(originalMethod),
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method_getTypeEncoding(originalMethod));
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} else {
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method_exchangeImplementations(originalMethod, swizzledMethod);
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}
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});
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}
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}
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- (BOOL)mouseDownCanMoveWindow {
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return NO;
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}
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// For debugging purposes only.
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- (void)drawDebugRect:(NSRect)aRect {
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[[[NSColor redColor] colorWithAlphaComponent:0.5] set];
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NSRectFill([self bounds]);
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}
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@end
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namespace electron {
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NativeBrowserViewMac::NativeBrowserViewMac(
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InspectableWebContents* inspectable_web_contents)
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: NativeBrowserView(inspectable_web_contents) {
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auto* iwc_view = GetInspectableWebContentsView();
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if (!iwc_view)
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return;
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auto* view = iwc_view->GetNativeView().GetNativeNSView();
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view.autoresizingMask = kDefaultAutoResizingMask;
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}
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NativeBrowserViewMac::~NativeBrowserViewMac() = default;
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void NativeBrowserViewMac::SetAutoResizeFlags(uint8_t flags) {
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NSAutoresizingMaskOptions autoresizing_mask = kDefaultAutoResizingMask;
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if (flags & kAutoResizeWidth) {
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autoresizing_mask |= NSViewWidthSizable;
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}
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if (flags & kAutoResizeHeight) {
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autoresizing_mask |= NSViewHeightSizable;
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}
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if (flags & kAutoResizeHorizontal) {
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autoresizing_mask |=
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NSViewMaxXMargin | NSViewMinXMargin | NSViewWidthSizable;
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}
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if (flags & kAutoResizeVertical) {
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autoresizing_mask |=
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NSViewMaxYMargin | NSViewMinYMargin | NSViewHeightSizable;
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}
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auto* iwc_view = GetInspectableWebContentsView();
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if (!iwc_view)
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return;
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auto* view = iwc_view->GetNativeView().GetNativeNSView();
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view.autoresizingMask = autoresizing_mask;
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}
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void NativeBrowserViewMac::SetBounds(const gfx::Rect& bounds) {
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auto* iwc_view = GetInspectableWebContentsView();
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if (!iwc_view)
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return;
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auto* view = iwc_view->GetNativeView().GetNativeNSView();
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auto* superview = view.superview;
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const auto superview_height = superview ? superview.frame.size.height : 0;
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// We need to use the content rect to calculate the titlebar height if the
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// superview is an framed NSWindow, otherwise it will be offset incorrectly by
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// the height of the titlebar.
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auto titlebar_height = 0;
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if (auto* win = [superview window]) {
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const auto content_rect_height =
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[win contentRectForFrameRect:superview.frame].size.height;
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titlebar_height = superview_height - content_rect_height;
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}
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auto new_height =
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superview_height - bounds.y() - bounds.height() + titlebar_height;
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view.frame =
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NSMakeRect(bounds.x(), new_height, bounds.width(), bounds.height());
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// Ensure draggable regions are properly updated to reflect new bounds.
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UpdateDraggableRegions(draggable_regions_);
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}
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gfx::Rect NativeBrowserViewMac::GetBounds() {
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auto* iwc_view = GetInspectableWebContentsView();
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if (!iwc_view)
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return gfx::Rect();
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NSView* view = iwc_view->GetNativeView().GetNativeNSView();
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auto* superview = view.superview;
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const int superview_height = superview ? superview.frame.size.height : 0;
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// We need to use the content rect to calculate the titlebar height if the
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// superview is an framed NSWindow, otherwise it will be offset incorrectly by
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// the height of the titlebar.
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auto titlebar_height = 0;
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if (auto* win = [superview window]) {
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const auto content_rect_height =
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[win contentRectForFrameRect:superview.frame].size.height;
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titlebar_height = superview_height - content_rect_height;
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}
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auto new_height = superview_height - view.frame.origin.y -
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view.frame.size.height + titlebar_height;
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return gfx::Rect(view.frame.origin.x, new_height, view.frame.size.width,
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view.frame.size.height);
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}
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void NativeBrowserViewMac::SetBackgroundColor(SkColor color) {
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auto* iwc_view = GetInspectableWebContentsView();
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if (!iwc_view)
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return;
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auto* view = iwc_view->GetNativeView().GetNativeNSView();
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view.wantsLayer = YES;
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view.layer.backgroundColor = skia::CGColorCreateFromSkColor(color);
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}
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void NativeBrowserViewMac::UpdateDraggableRegions(
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const std::vector<gfx::Rect>& drag_exclude_rects) {
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if (!inspectable_web_contents_)
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return;
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auto* web_contents = inspectable_web_contents_->GetWebContents();
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auto* iwc_view = GetInspectableWebContentsView();
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NSView* web_view = web_contents->GetNativeView().GetNativeNSView();
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NSView* inspectable_view = iwc_view->GetNativeView().GetNativeNSView();
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NSView* window_content_view = inspectable_view.superview;
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// Remove all DragRegionViews that were added last time. Note that we need
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// to copy the `subviews` array to avoid mutation during iteration.
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base::scoped_nsobject<NSArray> subviews([[web_view subviews] copy]);
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for (NSView* subview in subviews.get()) {
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if ([subview isKindOfClass:[DragRegionView class]]) {
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[subview removeFromSuperview];
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}
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}
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// Create one giant NSView that is draggable.
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base::scoped_nsobject<NSView> drag_region_view(
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[[DragRegionView alloc] initWithFrame:web_view.bounds]);
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[web_view addSubview:drag_region_view];
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// Then, on top of that, add "exclusion zones".
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auto const offset = GetBounds().OffsetFromOrigin();
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const auto window_content_view_height = NSHeight(window_content_view.bounds);
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for (const auto& rect : drag_exclude_rects) {
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const auto x = rect.x() + offset.x();
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const auto y = window_content_view_height - (rect.bottom() + offset.y());
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const auto exclude_rect = NSMakeRect(x, y, rect.width(), rect.height());
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const auto drag_region_view_exclude_rect =
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[window_content_view convertRect:exclude_rect toView:drag_region_view];
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base::scoped_nsobject<NSView> exclude_drag_region_view(
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[[ExcludeDragRegionView alloc]
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initWithFrame:drag_region_view_exclude_rect]);
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[drag_region_view addSubview:exclude_drag_region_view];
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}
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}
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void NativeBrowserViewMac::UpdateDraggableRegions(
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const std::vector<mojom::DraggableRegionPtr>& regions) {
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if (!inspectable_web_contents_)
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return;
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auto* web_contents = inspectable_web_contents_->GetWebContents();
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NSView* web_view = web_contents->GetNativeView().GetNativeNSView();
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NSInteger webViewWidth = NSWidth([web_view bounds]);
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NSInteger webViewHeight = NSHeight([web_view bounds]);
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// Draggable regions are implemented by having the whole web view draggable
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// and overlaying regions that are not draggable.
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if (&draggable_regions_ != ®ions)
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draggable_regions_ = mojo::Clone(regions);
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std::vector<gfx::Rect> drag_exclude_rects;
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if (draggable_regions_.empty()) {
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drag_exclude_rects.emplace_back(0, 0, webViewWidth, webViewHeight);
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} else {
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drag_exclude_rects = CalculateNonDraggableRegions(
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DraggableRegionsToSkRegion(draggable_regions_), webViewWidth,
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webViewHeight);
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}
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UpdateDraggableRegions(drag_exclude_rects);
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}
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// static
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NativeBrowserView* NativeBrowserView::Create(
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InspectableWebContents* inspectable_web_contents) {
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return new NativeBrowserViewMac(inspectable_web_contents);
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}
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} // namespace electron
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