Implement confirm bubble for Mac.

chrome/browser/ui/cocoa/confirm_bubble_view.mm

+// Copyright (c) 2012 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/confirm_bubble_view.h"
+
+#include "base/string16.h"
+#import "base/mac/cocoa_protocols.h"
+#include "chrome/browser/themes/theme_service.h"
+#import "chrome/browser/ui/cocoa/confirm_bubble_controller.h"
+#include "chrome/browser/ui/confirm_bubble_model.h"
+#import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/point.h"
+
+namespace {
+
+// The width for the message text. We break lines so the specified message fits
+// into this width.
+const int kMaxMessageWidth = 400;
+
+// The corner redius of this bubble view.
+const int kBubbleCornerRadius = 3;
+
+// The color for the border of this bubble view.
+const float kBubbleWindowEdge = 0.7f;
+
+// Constants used for layouting controls. These variables are copied from
+// "ui/views/layout/layout_constants.h".
+// Vertical spacing between a label and some control.
+const int kLabelToControlVerticalSpacing = 8;
+
+// Horizontal spacing between controls that are logically related.
+const int kRelatedControlHorizontalSpacing = 8;
+
+// Vertical spacing between controls that are logically related.
+const int kRelatedControlVerticalSpacing = 8;
+
+// Horizontal spacing between controls that are logically unrelated.
+const int kUnrelatedControlHorizontalSpacing = 12;
+
+// Vertical spacing between the edge of the window and the
+// top or bottom of a button.
+const int kButtonVEdgeMargin = 6;
+
+// Horizontal spacing between the edge of the window and the
+// left or right of a button.
+const int kButtonHEdgeMargin = 7;
+
+}  // namespace
+
+void ConfirmBubbleModel::Show(gfx::NativeView view,
+                              const gfx::Point& origin,
+                              ConfirmBubbleModel* model) {
+  // Create a custom NSViewController that manages a bubble view, and add it to
+  // a child to the specified view. This controller will be automatically
+  // deleted when it loses first-responder status.
+  ConfirmBubbleController* controller =
+      [[ConfirmBubbleController alloc] initWithParent:view
+                                               origin:origin.ToCGPoint()
+                                                model:model];
+  [view addSubview:[controller view]
+        positioned:NSWindowAbove
+        relativeTo:nil];
+  [[view window] makeFirstResponder:[controller view]];
+}
+
+// An interface that is derived from NSTextView and does not accept
+// first-responder status, i.e. a NSTextView-derived class that never becomes
+// the first responder. When we click a NSTextView object, it becomes the first
+// responder. Unfortunately, we delete the ConfirmBubbleView object anytime when
+// it loses first-responder status not to prevent disturbing other responders.
+// To prevent text views in this ConfirmBubbleView object from stealing the
+// first-responder status, we use this view in the ConfirmBubbleView object.
+@interface ConfirmBubbleTextView : NSTextView
+@end
+
+@implementation ConfirmBubbleTextView
+
+- (BOOL)acceptsFirstResponder {
+  return NO;
+}
+
+@end
+
+// Private Methods
+@interface ConfirmBubbleView (Private)
+- (void)performLayout;
+- (void)closeBubble;
+@end
+
+@implementation ConfirmBubbleView
+
+- (id)initWithParent:(NSView*)parent
+          controller:(ConfirmBubbleController*)controller {
+  // Create a NSView and set its width. We will set its position and height
+  // after finish layouting controls in performLayout:.
+  NSRect bounds =
+      NSMakeRect(0, 0, kMaxMessageWidth + kButtonHEdgeMargin * 2, 0);
+  if (self = [super initWithFrame:bounds]) {
+    parent_ = parent;
+    controller_ = controller;
+    [self performLayout];
+  }
+  return self;
+}
+
+- (void)drawRect:(NSRect)dirtyRect {
+  // Fill the background rectangle in white and draw its edge.
+  NSRect bounds = [self bounds];
+  bounds = NSInsetRect(bounds, 0.5, 0.5);
+  NSBezierPath* border =
+      [NSBezierPath gtm_bezierPathWithRoundRect:bounds
+                            topLeftCornerRadius:kBubbleCornerRadius
+                           topRightCornerRadius:kBubbleCornerRadius
+                         bottomLeftCornerRadius:kBubbleCornerRadius
+                        bottomRightCornerRadius:kBubbleCornerRadius];
+  [[NSColor colorWithDeviceWhite:1.0f alpha:1.0f] set];
+  [border fill];
+  [[NSColor colorWithDeviceWhite:kBubbleWindowEdge alpha:1.0f] set];
+  [border stroke];
+}
+
+// An NSResponder method.
+- (BOOL)resignFirstResponder {
+  // We do not only accept this request but also close this bubble when we are
+  // asked to resign the first responder. This bubble should be displayed only
+  // while it is the first responder.
+  [self closeBubble];
+  return YES;
+}
+
+// NSControl action handlers. These handlers are called when we click a cancel
+// button, a close icon, and an OK button, respectively.
+- (IBAction)cancel:(id)sender {
+  [controller_ cancel];
+  [self closeBubble];
+}
+
+- (IBAction)close:(id)sender {
+  [self closeBubble];
+}
+
+- (IBAction)ok:(id)sender {
+  [controller_ accept];
+  [self closeBubble];
+}
+
+// An NSTextViewDelegate method. This function is called when we click a link in
+// this bubble.
+- (BOOL)textView:(NSTextView*)textView
+   clickedOnLink:(id)link
+         atIndex:(NSUInteger)charIndex {
+  [controller_ linkClicked];
+  [self closeBubble];
+  return YES;
+}
+
+// Initializes controls specified by the ConfirmBubbleModel object and layouts
+// them into this bubble. This function retrieves text and images from the
+// ConfirmBubbleModel object (via the ConfirmBubbleController object) and
+// layouts them programmatically. This function layouts controls in the botom-up
+// order since NSView uses bottom-up coordinate.
+- (void)performLayout {
+  NSRect frameRect = [self frame];
+
+  // Add the ok button and the cancel button to the first row if we have either
+  // of them.
+  CGFloat left = kButtonHEdgeMargin;
+  CGFloat right = frameRect.size.width - kButtonHEdgeMargin;
+  CGFloat bottom = kButtonVEdgeMargin;
+  CGFloat height = 0;
+  if ([controller_ hasOkButton]) {
+    okButton_.reset([[NSButton alloc]
+        initWithFrame:NSMakeRect(0, bottom, 0, 0)]);
+    [okButton_.get() setBezelStyle:NSRoundedBezelStyle];
+    [okButton_.get() setTitle:[controller_ okButtonText]];
+    [okButton_.get() setTarget:self];
+    [okButton_.get() setAction:@selector(ok:)];
+    [okButton_.get() sizeToFit];
+    NSRect okButtonRect = [okButton_.get() frame];
+    right -= okButtonRect.size.width;
+    okButtonRect.origin.x = right;
+    [okButton_.get() setFrame:okButtonRect];
+    [self addSubview:okButton_.get()];
+    height = std::max(height, okButtonRect.size.height);
+  }
+  if ([controller_ hasCancelButton]) {
+    cancelButton_.reset([[NSButton alloc]
+        initWithFrame:NSMakeRect(0, bottom, 0, 0)]);
+    [cancelButton_.get() setBezelStyle:NSRoundedBezelStyle];
+    [cancelButton_.get() setTitle:[controller_ cancelButtonText]];
+    [cancelButton_.get() setTarget:self];
+    [cancelButton_.get() setAction:@selector(cancel:)];
+    [cancelButton_.get() sizeToFit];
+    NSRect cancelButtonRect = [cancelButton_.get() frame];
+    right -= cancelButtonRect.size.width + kButtonHEdgeMargin;
+    cancelButtonRect.origin.x = right;
+    [cancelButton_.get() setFrame:cancelButtonRect];
+    [self addSubview:cancelButton_.get()];
+    height = std::max(height, cancelButtonRect.size.height);
+  }
+
+  // Add the message label (and the link label) to the second row.
+  left = kButtonHEdgeMargin;
+  right = frameRect.size.width;
+  bottom += height + kRelatedControlVerticalSpacing;
+  height = 0;
+  messageLabel_.reset([[ConfirmBubbleTextView alloc]
+      initWithFrame:NSMakeRect(left, bottom, kMaxMessageWidth, 0)]);
+  NSString* messageText = [controller_ messageText];
+  NSMutableDictionary* attributes = [NSMutableDictionary dictionary];
+  scoped_nsobject<NSMutableAttributedString> attributedMessage(
+      [[NSMutableAttributedString alloc] initWithString:messageText
+                                             attributes:attributes]);
+  NSString* linkText = [controller_ linkText];
+  if (linkText) {
+    [attributes setObject:[NSString string]
+                   forKey:NSLinkAttributeName];
+    scoped_nsobject<NSAttributedString> attributedLink(
+        [[NSAttributedString alloc] initWithString:linkText
+                                        attributes:attributes]);
+    [attributedMessage.get() appendAttributedString:attributedLink.get()];
+  }
+  [[messageLabel_.get() textStorage] setAttributedString:attributedMessage];
+  [messageLabel_.get() setHorizontallyResizable:NO];
+  [messageLabel_.get() setVerticallyResizable:YES];
+  [messageLabel_.get() setEditable:NO];
+  [messageLabel_.get() setDrawsBackground:NO];
+  [messageLabel_.get() setDelegate:self];
+  [messageLabel_.get() sizeToFit];
+  height = [messageLabel_.get() frame].size.height;
+  [self addSubview:messageLabel_.get()];
+
+  // Add the icon and the title label to the third row.
+  left = kButtonHEdgeMargin;
+  right = frameRect.size.width;
+  bottom += height + kLabelToControlVerticalSpacing;
+  height = 0;
+  NSImage* iconImage = [controller_ icon];
+  if (iconImage) {
+    icon_.reset([[NSImageView alloc] initWithFrame:NSMakeRect(
+        left, bottom, [iconImage size].width, [iconImage size].height)]);
+    [icon_.get() setImage:iconImage];
+    [self addSubview:icon_.get()];
+    left += [icon_.get() frame].size.width + kRelatedControlHorizontalSpacing;
+    height = std::max(height, [icon_.get() frame].size.height);
+  }
+  titleLabel_.reset([[NSTextView alloc]
+      initWithFrame:NSMakeRect(left, bottom, right - left, 0)]);
+  [titleLabel_.get() setString:[controller_ title]];
+  [titleLabel_.get() setHorizontallyResizable:NO];
+  [titleLabel_.get() setVerticallyResizable:YES];
+  [titleLabel_.get() setEditable:NO];
+  [titleLabel_.get() setSelectable:NO];
+  [titleLabel_.get() setDrawsBackground:NO];
+  [titleLabel_.get() sizeToFit];
+  [self addSubview:titleLabel_.get()];
+  height = std::max(height, [titleLabel_.get() frame].size.height);
+
+  // Adjust the frame rectangle of this bubble so we can show all controls.
+  NSRect parentRect = [parent_ frame];
+  frameRect.size.height = bottom + height + kButtonVEdgeMargin;
+  frameRect.origin.x = (parentRect.size.width - frameRect.size.width) / 2;
+  frameRect.origin.y = parentRect.size.height - frameRect.size.height;
+  [self setFrame:frameRect];
+}
+
+// Closes this bubble and releases all resources. This function just puts the
+// owner ConfirmBubbleController object to the current autorelease pool. (This
+// view will be deleted when the owner object is deleted.)
+- (void)closeBubble {
+  [self removeFromSuperview];
+  [controller_ autorelease];
+  parent_ = nil;
+  controller_ = nil;
+}
+
+@end
+
+@implementation ConfirmBubbleView (ExposedForUnitTesting)
+
+- (void)clickOk {
+  [self ok:self];
+}
+
+- (void)clickCancel {
+  [self cancel:self];
+}
+
+- (void)clickLink {
+  [self textView:messageLabel_.get() clickedOnLink:nil atIndex:0];
+}
+
+@end