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// Copyright (c) 2009 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.
#include "base/logging.h"
#include "base/mac_util.h"
#import "chrome/browser/cocoa/browser_window_controller.h"
#include "chrome/browser/cocoa/infobar.h"
#import "chrome/browser/cocoa/infobar_container_controller.h"
#import "chrome/browser/cocoa/infobar_controller.h"
#include "chrome/browser/cocoa/tab_strip_model_observer_bridge.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/common/notification_service.h"
#include "skia/ext/skia_utils_mac.h"
// C++ class that receives INFOBAR_ADDED and INFOBAR_REMOVED
// notifications and proxies them back to |controller|.
class InfoBarNotificationObserver : public NotificationObserver {
public:
InfoBarNotificationObserver(InfoBarContainerController* controller)
: controller_(controller) {
}
private:
// NotificationObserver implementation
void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type.value) {
case NotificationType::TAB_CONTENTS_INFOBAR_ADDED:
[controller_ addInfoBar:Details<InfoBarDelegate>(details).ptr()];
break;
case NotificationType::TAB_CONTENTS_INFOBAR_REMOVED:
[controller_
removeInfoBarsForDelegate:Details<InfoBarDelegate>(details).ptr()];
break;
default:
NOTREACHED(); // we don't ask for anything else!
break;
}
[controller_ positionInfoBarsAndRedraw];
}
InfoBarContainerController* controller_; // weak, owns us.
};
@interface InfoBarContainerController (PrivateMethods)
// Returns the desired height of the container view, computed by
// adding together the heights of all its subviews.
- (float)desiredHeight;
// Modifies this container to display infobars for the given
// |contents|. Registers for INFOBAR_ADDED and INFOBAR_REMOVED
// notifications for |contents|. If we are currently showing any
// infobars, removes them first and deregisters for any
// notifications. |contents| can be NULL, in which case no infobars
// are shown and no notifications are registered for.
- (void)changeTabContents:(TabContents*)contents;
@end
@implementation InfoBarContainerController
- (id)initWithTabStripModel:(TabStripModel*)model
browserWindowController:(BrowserWindowController*)controller {
DCHECK(controller);
if ((self = [super initWithNibName:@"InfoBarContainer"
bundle:mac_util::MainAppBundle()])) {
browserController_ = controller;
tabObserver_.reset(new TabStripModelObserverBridge(model, self));
infoBarObserver_.reset(new InfoBarNotificationObserver(self));
// NSMutableArray needs an initial capacity, and we rarely ever see
// more than two infobars at a time, so that seems like a good choice.
infobarControllers_.reset([[NSMutableArray alloc] initWithCapacity:2]);
}
return self;
}
- (void)dealloc {
DCHECK([infobarControllers_ count] == 0);
[super dealloc];
}
- (void)removeDelegate:(InfoBarDelegate*)delegate {
DCHECK(currentTabContents_);
currentTabContents_->RemoveInfoBar(delegate);
}
// TabStripModelObserverBridge notifications
- (void)selectTabWithContents:(TabContents*)newContents
previousContents:(TabContents*)oldContents
atIndex:(NSInteger)index
userGesture:(bool)wasUserGesture {
[self changeTabContents:newContents];
}
- (void)tabDetachedWithContents:(TabContents*)contents
atIndex:(NSInteger)index {
[self changeTabContents:NULL];
}
@end
@implementation InfoBarContainerController (PrivateMethods)
- (float)desiredHeight {
float height = 0;
for (InfoBarController* controller in infobarControllers_.get()) {
height += [[controller view] frame].size.height;
}
return height;
}
- (void)changeTabContents:(TabContents*)contents {
registrar_.RemoveAll();
[self removeAllInfoBars];
currentTabContents_ = contents;
if (currentTabContents_) {
for (int i = 0; i < currentTabContents_->infobar_delegate_count(); ++i) {
[self addInfoBar:currentTabContents_->GetInfoBarDelegateAt(i)];
}
Source<TabContents> source(currentTabContents_);
registrar_.Add(infoBarObserver_.get(),
NotificationType::TAB_CONTENTS_INFOBAR_ADDED, source);
registrar_.Add(infoBarObserver_.get(),
NotificationType::TAB_CONTENTS_INFOBAR_REMOVED, source);
}
[self positionInfoBarsAndRedraw];
}
- (void)addInfoBar:(InfoBarDelegate*)delegate {
scoped_ptr<InfoBar> infobar(delegate->CreateInfoBar());
InfoBarController* controller = infobar->controller();
[controller setContainerController:self];
[[self view] addSubview:[controller view]];
[infobarControllers_ addObject:[controller autorelease]];
}
- (void)removeInfoBarsForDelegate:(InfoBarDelegate*)delegate {
for (InfoBarController* controller in
[NSArray arrayWithArray:infobarControllers_.get()]) {
if ([controller delegate] == delegate) {
// This code can be executed while -[InfoBarController closeInfoBar] is
// still on the stack, so we retain and autorelease the controller to
// prevent it from being dealloc'ed too early.
[[controller retain] autorelease];
[[controller view] removeFromSuperview];
[infobarControllers_ removeObject:controller];
}
}
}
- (void)removeAllInfoBars {
for (InfoBarController* controller in infobarControllers_.get()) {
[[controller view] removeFromSuperview];
}
[infobarControllers_ removeAllObjects];
}
- (void)positionInfoBarsAndRedraw {
NSRect containerBounds = [[self view] bounds];
int minY = 0;
// Stack the infobars at the bottom of the view, starting with the
// last infobar and working our way to the front of the array. This
// way we ensure that the first infobar added shows up on top, with
// the others below.
for (InfoBarController* controller in
[infobarControllers_ reverseObjectEnumerator]) {
NSView* view = [controller view];
NSRect frame = [view frame];
frame.origin.x = NSMinX(containerBounds);
frame.size.width = NSWidth(containerBounds);
frame.origin.y = minY;
minY += frame.size.height;
// TODO(rohitrao, jrg): Replace with an animator.
[view setFrame:frame];
}
[browserController_ infoBarResized:[self desiredHeight]];
}
@end
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