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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/ui/cocoa/extensions/browser_actions_container_view.h"
#include <algorithm>
#include "base/basictypes.h"
#import "base/memory/scoped_nsobject.h"
#import "chrome/browser/ui/cocoa/view_id_util.h"
NSString* const kBrowserActionGrippyDragStartedNotification =
@"BrowserActionGrippyDragStartedNotification";
NSString* const kBrowserActionGrippyDraggingNotification =
@"BrowserActionGrippyDraggingNotification";
NSString* const kBrowserActionGrippyDragFinishedNotification =
@"BrowserActionGrippyDragFinishedNotification";
namespace {
const CGFloat kAnimationDuration = 0.2;
const CGFloat kGrippyWidth = 4.0;
const CGFloat kMinimumContainerWidth = 10.0;
} // namespace
@interface BrowserActionsContainerView(Private)
// Returns the cursor that should be shown when hovering over the grippy based
// on |canDragLeft_| and |canDragRight_|.
- (NSCursor*)appropriateCursorForGrippy;
@end
@implementation BrowserActionsContainerView
@synthesize animationEndFrame = animationEndFrame_;
@synthesize canDragLeft = canDragLeft_;
@synthesize canDragRight = canDragRight_;
@synthesize grippyPinned = grippyPinned_;
@synthesize maxWidth = maxWidth_;
@synthesize userIsResizing = userIsResizing_;
#pragma mark -
#pragma mark Overridden Class Functions
- (id)initWithFrame:(NSRect)frameRect {
if ((self = [super initWithFrame:frameRect])) {
grippyRect_ = NSMakeRect(0.0, 0.0, kGrippyWidth, NSHeight([self bounds]));
canDragLeft_ = YES;
canDragRight_ = YES;
resizable_ = YES;
[self setHidden:YES];
}
return self;
}
- (void)setResizable:(BOOL)resizable {
if (resizable == resizable_)
return;
resizable_ = resizable;
[self setNeedsDisplay:YES];
}
- (BOOL)isResizable {
return resizable_;
}
- (void)resetCursorRects {
[self discardCursorRects];
[self addCursorRect:grippyRect_ cursor:[self appropriateCursorForGrippy]];
}
- (BOOL)acceptsFirstResponder {
return YES;
}
- (void)mouseDown:(NSEvent*)theEvent {
initialDragPoint_ = [self convertPoint:[theEvent locationInWindow]
fromView:nil];
if (!resizable_ ||
!NSMouseInRect(initialDragPoint_, grippyRect_, [self isFlipped]))
return;
lastXPos_ = [self frame].origin.x;
userIsResizing_ = YES;
[[self appropriateCursorForGrippy] push];
// Disable cursor rects so that the Omnibox and other UI elements don't push
// cursors while the user is dragging. The cursor should be grippy until
// the |-mouseUp:| message is received.
[[self window] disableCursorRects];
[[NSNotificationCenter defaultCenter]
postNotificationName:kBrowserActionGrippyDragStartedNotification
object:self];
}
- (void)mouseUp:(NSEvent*)theEvent {
if (!userIsResizing_)
return;
[NSCursor pop];
[[self window] enableCursorRects];
userIsResizing_ = NO;
[[NSNotificationCenter defaultCenter]
postNotificationName:kBrowserActionGrippyDragFinishedNotification
object:self];
}
- (void)mouseDragged:(NSEvent*)theEvent {
if (!userIsResizing_)
return;
NSPoint location = [self convertPoint:[theEvent locationInWindow]
fromView:nil];
NSRect containerFrame = [self frame];
CGFloat dX = [theEvent deltaX];
CGFloat withDelta = location.x - dX;
canDragRight_ = (withDelta >= initialDragPoint_.x) &&
(NSWidth(containerFrame) > kMinimumContainerWidth);
canDragLeft_ = (withDelta <= initialDragPoint_.x) &&
(NSWidth(containerFrame) < maxWidth_);
if ((dX < 0.0 && !canDragLeft_) || (dX > 0.0 && !canDragRight_))
return;
containerFrame.size.width =
std::max(NSWidth(containerFrame) - dX, kMinimumContainerWidth);
if (NSWidth(containerFrame) == kMinimumContainerWidth)
return;
containerFrame.origin.x += dX;
[self setFrame:containerFrame];
[self setNeedsDisplay:YES];
[[NSNotificationCenter defaultCenter]
postNotificationName:kBrowserActionGrippyDraggingNotification
object:self];
lastXPos_ += dX;
}
- (ViewID)viewID {
return VIEW_ID_BROWSER_ACTION_TOOLBAR;
}
#pragma mark -
#pragma mark Public Methods
- (void)resizeToWidth:(CGFloat)width animate:(BOOL)animate {
width = std::max(width, kMinimumContainerWidth);
NSRect frame = [self frame];
lastXPos_ = frame.origin.x;
CGFloat dX = frame.size.width - width;
frame.size.width = width;
NSRect newFrame = NSOffsetRect(frame, dX, 0);
if (animate) {
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:kAnimationDuration];
[[self animator] setFrame:newFrame];
[NSAnimationContext endGrouping];
animationEndFrame_ = newFrame;
} else {
[self setFrame:newFrame];
[self setNeedsDisplay:YES];
}
}
- (CGFloat)resizeDeltaX {
return [self frame].origin.x - lastXPos_;
}
#pragma mark -
#pragma mark Private Methods
// Returns the cursor to display over the grippy hover region depending on the
// current drag state.
- (NSCursor*)appropriateCursorForGrippy {
NSCursor* retVal;
if (!resizable_ || (!canDragLeft_ && !canDragRight_)) {
retVal = [NSCursor arrowCursor];
} else if (!canDragLeft_) {
retVal = [NSCursor resizeRightCursor];
} else if (!canDragRight_) {
retVal = [NSCursor resizeLeftCursor];
} else {
retVal = [NSCursor resizeLeftRightCursor];
}
return retVal;
}
@end
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