Mac: Make autocomplete popup track autocomplete field resizes.

chrome/browser/autocomplete/autocomplete_popup_view_mac.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.
 
 #include "chrome/browser/autocomplete/autocomplete_popup_view_mac.h"
 
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
@@ skipping 172 matching lines @@
 // directly.
 
 @interface AutocompleteMatrixTarget : NSObject {
  @private
   AutocompletePopupViewMac* popup_view_;  // weak, owns us.
 }
 - initWithPopupView:(AutocompletePopupViewMac*)view;
 
 // Tell popup model via popup_view_ about the selected row.
 - (void)select:sender;
+
+// Resize the popup when the field's window resizes.
+- (void)windowDidResize:(NSNotification*)notification;
+
 @end
 
 AutocompletePopupViewMac::AutocompletePopupViewMac(
     AutocompleteEditViewMac* edit_view,
     AutocompleteEditModel* edit_model,
     Profile* profile,
     NSTextField* field)
     : model_(new AutocompletePopupModel(this, edit_model, profile)),
       edit_view_(edit_view),
       field_(field),
@@ skipping 31 matching lines @@
     [popup_ setMovableByWindowBackground:NO];
     [popup_ setOpaque:YES];
     [popup_ setHasShadow:YES];
     [popup_ setLevel:NSNormalWindowLevel];
 
     AutocompleteMatrix* matrix =
         [[[AutocompleteMatrix alloc] initWithFrame:NSZeroRect] autorelease];
     [matrix setTarget:matrix_target_];
     [matrix setAction:@selector(select:)];
     [popup_ setContentView:matrix];
+
+    // We need the popup to follow window resize.
+    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
+    [nc addObserver:matrix_target_ 
+           selector:@selector(windowDidResize:) 
+               name:NSWindowDidResizeNotification 
+             object:[field_ window]];
   }
 }
 
 void AutocompletePopupViewMac::UpdatePopupAppearance() {
   const AutocompleteResult& result = model_->result();
   if (result.empty()) {
     [[popup_ parentWindow] removeChildWindow:popup_];
     [popup_ orderOut:nil];
 
     // Break references to matrix_target_ before releasing popup_.
     NSMatrix* matrix = [popup_ contentView];
     [matrix setTarget:nil];
 
+    NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
+    [nc removeObserver:matrix_target_
+                  name:NSWindowDidResizeNotification 
+                object:[field_ window]];
+
     popup_.reset(nil);
 
     return;
   }
 
   CreatePopupIfNeeded();
 
   // Load the results into the popup's matrix.
   AutocompleteMatrix* matrix = [popup_ contentView];
   const size_t rows = model_->result().size();
@@ skipping 181 matching lines @@
     popup_view_ = view;
   }
   return self;
 }
 
 - (void)select:sender {
   DCHECK(popup_view_);
   popup_view_->AcceptInput();
 }
 
+- (void)windowDidResize:(NSNotification*)notification {
+  DCHECK(popup_view_);
+
+  // TODO(shess): UpdatePopupAppearance() is called frequently, so it
+  // should be really cheap, but in this case we could probably make
+  // things even cheaper by refactoring between the popup-placement
+  // code and the matrix-population code.
+  popup_view_->UpdatePopupAppearance();
+}
+
 @end