First cut at infobars on Mac. These are not expected to be...

chrome/browser/cocoa/infobar_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 <Cocoa/Cocoa.h>
+
+#include "base/mac_util.h"
+#include "base/sys_string_conversions.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/tab_contents/tab_contents.h"
+#include "skia/ext/skia_utils_mac.h"
+#include "webkit/glue/window_open_disposition.h"
+
+
+@interface InfoBarController (PrivateMethods)
+// Closes the infobar by calling RemoveDelegate on the container.
+// This will remove the infobar from its associated TabContents as
+// well as trigger the deletion of this InfoBarController.  Once the
+// delegate is removed from the container, it is no longer needed, so
+// we ask it to delete itself.
+- (void)closeInfoBar;
+@end
+
+@implementation InfoBarController
+
+@synthesize containerController = containerController_;
+@synthesize delegate = delegate_;
+
+- (id)initWithDelegate:(InfoBarDelegate*)delegate {
+  DCHECK(delegate);
+  if ((self = [super initWithNibName:@"InfoBar"
+                              bundle:mac_util::MainAppBundle()])) {
+    delegate_ = delegate;
+  }
+  return self;
+}
+
+// All infobars have an icon, so we set up the icon in the base class
+// awakeFromNib.
+- (void)awakeFromNib {
+  if (delegate_->GetIcon()) {
+    [image_ setImage:gfx::SkBitmapToNSImage(*(delegate_->GetIcon()))];
+  }
+
+  [self addAdditionalControls];
+}
+
+// Called when someone clicks on the close button.
+- (void)dismiss:(id)sender {
+  [self closeInfoBar];
+}
+
+- (void)addAdditionalControls {
+  // Default implementation does nothing.
+}
+
+@end
+
+@implementation InfoBarController (PrivateMethods)
+- (void)closeInfoBar {
+  // Calling RemoveDelegate() triggers notifications which will remove
+  // the infobar view from the infobar container.  At that point it is
+  // safe to ask the delegate to delete itself.
+  DCHECK(delegate_);
+  [containerController_ removeDelegate:delegate_];
+  delegate_->InfoBarClosed();
+  delegate_ = NULL;
+}
+@end
+
+
+/////////////////////////////////////////////////////////////////////////
+// AlertInfoBarController implementation
+
+@implementation AlertInfoBarController
+
+// Alert infobars have a text message.
+- (void)addAdditionalControls {
+  AlertInfoBarDelegate* delegate = delegate_->AsAlertInfoBarDelegate();
+  [label_ setStringValue:base::SysWideToNSString(
+        delegate->GetMessageText())];
+}
+
+@end
+
+
+/////////////////////////////////////////////////////////////////////////
+// LinkInfoBarController implementation
+
+@implementation LinkInfoBarController
+
+// Link infobars have a text message, of which part is linkified.  We
+// use an NSAttributedString to display styled text, and we set a
+// NSLink attribute on the hyperlink portion of the message.  Infobars
+// use a custom NSTextField subclass, which allows us to override
+// textView:clickedOnLink:atIndex: and intercept clicks.
+//
+// TODO(rohitrao): Using an NSTextField here has some weird UI side
+// effects, such as showing the wrong cursor at times.  Explore other
+// solutions.
+- (void)addAdditionalControls {
+  LinkInfoBarDelegate* delegate = delegate_->AsLinkInfoBarDelegate();
+  size_t offset = std::wstring::npos;
+  std::wstring message = delegate->GetMessageTextWithOffset(&offset);
+
+  // Create an attributes dictionary for the entire message.  We have
+  // to expicitly set the font to the system font, because
+  // NSAttributedString defaults to Helvetica 12.  We also override
+  // the cursor to give us the normal cursor rather than the text
+  // insertion cursor.
+  NSMutableDictionary* linkAttributes =
+      [NSMutableDictionary dictionaryWithObject:[NSCursor arrowCursor]
+                           forKey:NSCursorAttributeName];
+  [linkAttributes setObject:[NSFont systemFontOfSize:[NSFont systemFontSize]]
+                  forKey:NSFontAttributeName];
+
+  // Create the attributed string for the main message text.
+  NSMutableAttributedString* infoText =
+      [[NSMutableAttributedString alloc]
+        initWithString:base::SysWideToNSString(message)];
+  [infoText addAttributes:linkAttributes
+                    range:NSMakeRange(0, [infoText length])];
+
+  // Add additional attributes to style the link text appropriately as
+  // well as linkify it.  We use an empty string for the NSLink
+  // attribute because the actual object we pass doesn't matter, but
+  // it cannot be nil.
+  [linkAttributes setObject:[NSColor blueColor]
+                     forKey:NSForegroundColorAttributeName];
+  [linkAttributes setObject:[NSNumber numberWithBool:YES]
+                     forKey:NSUnderlineStyleAttributeName];
+  [linkAttributes setObject:[NSCursor pointingHandCursor]
+                     forKey:NSCursorAttributeName];
+  [linkAttributes setObject:[NSString string]  // dummy value
+                     forKey:NSLinkAttributeName];
+
+  // Insert the link text into the string at the appropriate offset.
+  [infoText insertAttributedString:
+              [[[NSAttributedString alloc]
+                 initWithString:base::SysWideToNSString(delegate->GetLinkText())
+                     attributes:linkAttributes] autorelease]
+            atIndex:offset];
+
+  // Update the label view with the new text.  The view must be
+  // selectable and allow editing text attributes for the
+  // linkification to work correctly.
+  [label_ setAllowsEditingTextAttributes: YES];
+  [label_ setSelectable: YES];
+  [label_ setAttributedStringValue:infoText];
+}
+
+// Called when someone clicks on the link in the infobar.  This method
+// is called by the InfobarTextField on its delegate (the
+// LinkInfoBarController).
+- (void)linkClicked {
+  // TODO(rohitrao): Set the disposition correctly based on modifier keys.
+  WindowOpenDisposition disposition = CURRENT_TAB;
+  if (delegate_->AsLinkInfoBarDelegate()->LinkClicked(disposition))
+    [self closeInfoBar];
+}
+
+@end
+
+
+/////////////////////////////////////////////////////////////////////////
+// ConfirmInfoBarController implementation
+
+@implementation ConfirmInfoBarController
+
+// Called when someone clicks on the "OK" button.
+- (IBAction)ok:(id)sender {
+  if (delegate_->AsConfirmInfoBarDelegate()->Accept())
+    [self closeInfoBar];
+}
+
+// Called when someone clicks on the "Cancel" button.
+- (IBAction)cancel:(id)sender {
+  if (delegate_->AsConfirmInfoBarDelegate()->Cancel())
+    [self closeInfoBar];
+}
+
+// Confirm infobars can have OK and/or cancel buttons, depending on
+// the return value of GetButtons().  We create each button if
+// required and position them to the left of the close button.
+- (void)addAdditionalControls {
+  ConfirmInfoBarDelegate* delegate = delegate_->AsConfirmInfoBarDelegate();
+  [label_ setStringValue:base::SysWideToNSString(delegate->GetMessageText())];
+
+  int visibleButtons = delegate->GetButtons();
+  NSButton *okButton = nil;
+  NSButton *cancelButton = nil;
+
+  // Create the OK button if needed.
+  if (visibleButtons & ConfirmInfoBarDelegate::BUTTON_OK) {
+    okButton = [[[NSButton alloc] initWithFrame:NSZeroRect] autorelease];
+    [okButton setBezelStyle:NSRoundedBezelStyle];
+    [okButton setTitle:base::SysWideToNSString(
+          delegate->GetButtonLabel(ConfirmInfoBarDelegate::BUTTON_OK))];
+    [okButton sizeToFit];
+    [okButton setAutoresizingMask:NSViewMinXMargin];
+    [okButton setTarget:self];
+    [okButton setAction:@selector(ok:)];
+  }
+
+  // Create the cancel button if needed.
+  if (visibleButtons & ConfirmInfoBarDelegate::BUTTON_CANCEL) {
+    cancelButton = [[[NSButton alloc] initWithFrame:NSZeroRect] autorelease];
+    [cancelButton setBezelStyle:NSRoundedBezelStyle];
+    [cancelButton setTitle:base::SysWideToNSString(
+          delegate->GetButtonLabel(ConfirmInfoBarDelegate::BUTTON_CANCEL))];
+    [cancelButton sizeToFit];
+    [cancelButton setAutoresizingMask:NSViewMinXMargin];
+    [cancelButton setTarget:self];
+    [cancelButton setAction:@selector(cancel:)];
+  }
+
+  // Position the cancel button, if it exists.
+  int cancelWidth = 0;
+  if (cancelButton) {
+    NSRect cancelFrame = [cancelButton frame];
+    cancelWidth = cancelFrame.size.width + 10;
+
+    // Position the cancel button to the left of the close button.  A 10px
+    // margin is already built into cancelWidth.
+    cancelFrame.origin.x = NSMinX([closeButton_ frame]) - cancelWidth;
+    cancelFrame.origin.y = 0;
+    [cancelButton setFrame:cancelFrame];
+    [[self view] addSubview:cancelButton];
+
+    // Resize the label box to extend all the way to the cancel button,
+    // minus a 10px argin.
+    NSRect labelFrame = [label_ frame];
+    labelFrame.size.width = NSMinX(cancelFrame) - 10 - NSMinX(labelFrame);
+    [label_ setFrame:labelFrame];
+  }
+
+  // Position the OK button, if it exists.
+  if (okButton) {
+    NSRect okFrame = [okButton frame];
+    int okWidth = okFrame.size.width + 10;
+
+    // Position the OK button to the left of the close button as
+    // well.  If a cancel button is present, |cancelWidth| will be positive.
+    // In either case, a 10px margin is built into okWidth.
+    okFrame.origin.x =
+        NSMinX([closeButton_ frame]) - cancelWidth - okWidth;
+    okFrame.origin.y = 0;
+    [okButton setFrame:okFrame];
+    [[self view] addSubview:okButton];
+
+    // Resize the label box to extend all the way to the OK button,
+    // minus a 10px argin.
+    NSRect labelFrame = [label_ frame];
+    labelFrame.size.width = NSMinX(okFrame) - 10 - NSMinX(labelFrame);
+    [label_ setFrame:labelFrame];
+  }
+}
+
+@end
+
+
+//////////////////////////////////////////////////////////////////////////
+// CreateInfoBar() implementations
+
+InfoBar* AlertInfoBarDelegate::CreateInfoBar() {
+  AlertInfoBarController* controller =
+      [[AlertInfoBarController alloc] initWithDelegate:this];
+  return new InfoBar(controller);
+}
+
+InfoBar* LinkInfoBarDelegate::CreateInfoBar() {
+  LinkInfoBarController* controller =
+      [[LinkInfoBarController alloc] initWithDelegate:this];
+  return new InfoBar(controller);
+}
+
+InfoBar* ConfirmInfoBarDelegate::CreateInfoBar() {
+  ConfirmInfoBarController* controller =
+      [[ConfirmInfoBarController alloc] initWithDelegate:this];
+  return new InfoBar(controller);
+}