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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/view_id_util.h"
#import <Cocoa/Cocoa.h>
#include <map>
#include <utility>
#include "base/lazy_instance.h"
#include "base/logging.h"
#import "chrome/browser/ui/cocoa/browser_window_controller.h"
#import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
namespace {
// TODO(suzhe): After migrating to Mac OS X 10.6, we may use Objective-C's new
// "Associative References" feature to attach the ViewID to the view directly
// rather than using a separated map.
typedef std::map<NSView*, ViewID> ViewIDMap;
static base::LazyInstance<ViewIDMap> g_view_id_map = LAZY_INSTANCE_INITIALIZER;
// Returns the view's nearest descendant (including itself) with a specific
// ViewID, or nil if no subview has that ViewID.
NSView* FindViewWithID(NSView* view, ViewID viewID) {
if ([view viewID] == viewID)
return view;
for (NSView* subview in [view subviews]) {
NSView* result = FindViewWithID(subview, viewID);
if (result != nil)
return result;
}
return nil;
}
} // anonymous namespace
namespace view_id_util {
void SetID(NSView* view, ViewID viewID) {
DCHECK(view);
DCHECK(viewID != VIEW_ID_NONE);
// We handle VIEW_ID_TAB_0 to VIEW_ID_TAB_LAST in GetView() function directly.
DCHECK(!((viewID >= VIEW_ID_TAB_0) && (viewID <= VIEW_ID_TAB_LAST)));
g_view_id_map.Get()[view] = viewID;
}
void UnsetID(NSView* view) {
DCHECK(view);
g_view_id_map.Get().erase(view);
}
NSView* GetView(NSWindow* window, ViewID viewID) {
DCHECK(viewID != VIEW_ID_NONE);
DCHECK(window);
// As tabs can be created, destroyed or rearranged dynamically, we handle them
// here specially.
if (viewID >= VIEW_ID_TAB_0 && viewID <= VIEW_ID_TAB_LAST) {
BrowserWindowController* windowController = [window windowController];
DCHECK([windowController isKindOfClass:[BrowserWindowController class]]);
TabStripController* tabStripController =
[windowController tabStripController];
DCHECK(tabStripController);
NSUInteger count = [tabStripController viewsCount];
DCHECK(count);
NSUInteger index =
(viewID == VIEW_ID_TAB_LAST ? count - 1 : viewID - VIEW_ID_TAB_0);
return index < count ? [tabStripController viewAtIndex:index] : nil;
}
return FindViewWithID([[window contentView] superview], viewID);
}
} // namespace view_id_util
@implementation NSView (ViewID)
- (ViewID)viewID {
ViewIDMap* map = g_view_id_map.Pointer();
ViewIDMap::const_iterator iter = map->find(self);
return iter != map->end() ? iter->second : VIEW_ID_NONE;
}
- (NSView*)ancestorWithViewID:(ViewID)viewID {
NSView* ancestor = self;
while (ancestor && [ancestor viewID] != viewID)
ancestor = [ancestor superview];
return ancestor;
}
@end
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