Initial download shelf on OS X....

chrome/browser/cocoa/download_shelf_controller.mm

+// 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.
+
+#import "download_shelf_controller.h"
+
+#include "base/mac_util.h"
+#import "chrome/browser/cocoa/browser_window_controller.h"
+#include "chrome/browser/cocoa/browser_window_cocoa.h"
+#include "chrome/browser/cocoa/download_shelf_mac.h"
+#import "chrome/browser/cocoa/download_shelf_view.h"
+
+
+@interface DownloadShelfController(Private)
+- (void)applyContentAreaOffset:(BOOL)apply;
+- (void)positionBar;
+- (void)showDownloadShelf:(BOOL)enable;
+@end
+
+
+@implementation DownloadShelfController
+
+- (id)initWithBrowser:(Browser*)browser
+          contentArea:(NSView*)content {
+  if ((self = [super initWithNibName:@"DownloadShelf"
+                              bundle:mac_util::MainAppBundle()])) {
+    contentArea_ = content;
+    shelfHeight_ = [[self view] bounds].size.height;
+
+    [self positionBar];
+    [[[contentArea_ window] contentView] addSubview:[self view]];
+
+    // This calls show:, so it needs to be last.
+    bridge_.reset(new DownloadShelfMac(browser, self));
+  }
+  return self;
+}
+
+// Initializes the download shelf at the bottom edge of |contentArea_|.
+- (void)positionBar {
+  // Set the bar's height to zero and position it at the bottom of the
+  // content area, within the window's content view (as opposed to the
+  // tab strip, which is a sibling). We'll enlarge it and slide the
+  // content area up when we need to show this strip.
+  NSRect contentFrame = [contentArea_ frame];
+  NSRect barFrame = NSMakeRect(0, 0,
+                               contentFrame.size.width, shelfHeight_);
+  [[self view] setFrame:barFrame];
+}
+
+// Called when the contentArea's frame changes.  Enlarge the view to
+// stay with the bottom of the contentArea.
+- (void)resizeDownloadShelf {
+  NSRect barFrame = [[self view] frame];
+  barFrame.origin.y = 0;
+  barFrame.size.height = NSMinY([contentArea_ frame]);
+  [[self view] setFrame:barFrame];
+}
+
+// Show or hide the bar based on the value of |enable|. Handles animating the
+// resize of the content view.
+- (void)showDownloadShelf:(BOOL)enable {
+  contentAreaHasOffset_ = enable;
+  [[self view] setHidden:enable ? NO : YES];
+  [self applyContentAreaOffset:enable];
+
+  barIsVisible_ = enable;
+}
+
+// Apply a contents box offset to make (or remove) room for the
+// download shelf.  If apply==YES, always make room (the contentView_ is
+// "full size").  If apply==NO we are trying to undo an offset.  If no
+// offset there is nothing to undo.
+- (void)applyContentAreaOffset:(BOOL)apply {
+  if (!contentAreaHasOffset_ && apply) {
+    // There is no offset to unconditionally apply.
+    return;
+  }
+
+  NSRect frame = [contentArea_ frame];
+  if (apply) {
+    frame.origin.y += shelfHeight_;
+    frame.size.height -= shelfHeight_;
+  } else {
+    frame.origin.y -= shelfHeight_;
+    frame.size.height += shelfHeight_;
+  }
+
+  [[contentArea_ animator] setFrame:frame];
+  [[self view] setNeedsDisplay:YES];
+  [contentArea_ setNeedsDisplay:YES];
+}
+
+- (DownloadShelf*)bridge {
+  return bridge_.get();
+}
+
+- (BOOL)isVisible {
+  return barIsVisible_;
+}
+
+- (void)show:(id)sender {
+  [self showDownloadShelf:YES];
+}
+
+- (void)hide:(id)sender {
+  [self showDownloadShelf:NO];
+}
+
+- (void)addDownloadItem:(NSView*)view {
+  [[self view] addSubview:view];
+}
+
+@end