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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/cocoa/base_view.h"
#include "base/check_op.h"
#include "base/mac/mac_util.h"
#include "ui/base/cocoa/tracking_area.h"
NSString* kViewDidBecomeFirstResponder =
@"Chromium.kViewDidBecomeFirstResponder";
NSString* kSelectionDirection = @"Chromium.kSelectionDirection";
@implementation BaseView {
ui::ScopedCrTrackingArea _trackingArea;
BOOL _dragging;
NSEvent* __strong _pendingExitEvent;
NSInteger _pressureEventStage;
}
- (instancetype)initWithFrame:(NSRect)frame tracking:(BOOL)tracking {
if ((self = [super initWithFrame:frame])) {
if (tracking) {
[self enableTracking];
}
}
return self;
}
- (void)dealloc {
[self disableTracking];
}
- (void)enableTracking {
if (_trackingArea.get()) {
return;
}
NSTrackingAreaOptions trackingOptions = NSTrackingMouseEnteredAndExited |
NSTrackingMouseMoved |
NSTrackingActiveAlways |
NSTrackingInVisibleRect;
CrTrackingArea* trackingArea =
[[CrTrackingArea alloc] initWithRect:NSZeroRect
options:trackingOptions
owner:self
userInfo:nil];
_trackingArea.reset(trackingArea);
[self addTrackingArea:_trackingArea.get()];
}
- (void)disableTracking {
if (_trackingArea.get()) {
[self removeTrackingArea:_trackingArea.get()];
_trackingArea.reset();
}
}
- (void)handleLeftMouseUp:(NSEvent*)theEvent {
DCHECK_EQ(theEvent.type, NSEventTypeLeftMouseUp);
_dragging = NO;
if (!_pendingExitEvent) {
return;
}
NSEvent* exitEvent =
[NSEvent enterExitEventWithType:NSEventTypeMouseExited
location:theEvent.locationInWindow
modifierFlags:theEvent.modifierFlags
timestamp:theEvent.timestamp
windowNumber:theEvent.windowNumber
context:nil
eventNumber:_pendingExitEvent.eventNumber
trackingNumber:_pendingExitEvent.trackingNumber
userData:_pendingExitEvent.userData];
[self mouseEvent:exitEvent];
_pendingExitEvent = nil;
}
- (void)mouseEvent:(NSEvent*)theEvent {
// This method left intentionally blank.
}
- (EventHandled)keyEvent:(NSEvent*)theEvent {
// The default implementation of this method does not handle any key events.
// Derived classes should return kEventHandled if they handled an event,
// otherwise it will be forwarded on to |super|.
return kEventNotHandled;
}
- (void)forceTouchEvent:(NSEvent*)theEvent {
// This method left intentionally blank.
}
- (void)tabletEvent:(NSEvent*)theEvent {
// This method left intentionally blank.
}
- (void)mouseDown:(NSEvent*)theEvent {
_dragging = YES;
[self mouseEvent:theEvent];
}
- (void)rightMouseDown:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)otherMouseDown:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)mouseUp:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
[self handleLeftMouseUp:theEvent];
}
- (void)rightMouseUp:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)otherMouseUp:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)mouseMoved:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)mouseDragged:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)rightMouseDragged:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)otherMouseDragged:(NSEvent*)theEvent {
[self mouseEvent:theEvent];
}
- (void)mouseEntered:(NSEvent*)theEvent {
if (_pendingExitEvent) {
_pendingExitEvent = nil;
return;
}
[self mouseEvent:theEvent];
}
- (void)mouseExited:(NSEvent*)theEvent {
// The tracking area will send an exit event even during a drag, which isn't
// how the event flow for drags should work. This stores the exit event, and
// sends it when the drag completes instead.
if (_dragging) {
_pendingExitEvent = theEvent;
return;
}
[self mouseEvent:theEvent];
}
- (void)keyDown:(NSEvent*)theEvent {
if ([self keyEvent:theEvent] != kEventHandled)
[super keyDown:theEvent];
}
- (void)keyUp:(NSEvent*)theEvent {
if ([self keyEvent:theEvent] != kEventHandled)
[super keyUp:theEvent];
}
- (void)pressureChangeWithEvent:(NSEvent*)theEvent {
NSInteger newStage = theEvent.stage;
if (_pressureEventStage == newStage)
return;
// Call the force touch event when the stage reaches 2, which is the value
// for force touch.
if (newStage == 2) {
[self forceTouchEvent:theEvent];
}
_pressureEventStage = newStage;
}
- (void)flagsChanged:(NSEvent*)theEvent {
if ([self keyEvent:theEvent] != kEventHandled)
[super flagsChanged:theEvent];
}
- (gfx::Rect)flipNSRectToRect:(NSRect)rect {
gfx::Rect new_rect(NSRectToCGRect(rect));
new_rect.set_y(NSHeight(self.bounds) - new_rect.bottom());
return new_rect;
}
- (NSRect)flipRectToNSRect:(gfx::Rect)rect {
NSRect new_rect(NSRectFromCGRect(rect.ToCGRect()));
new_rect.origin.y = NSHeight(self.bounds) - NSMaxY(new_rect);
return new_rect;
}
- (void)tabletProximity:(NSEvent*)theEvent {
[self tabletEvent:theEvent];
}
@end
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