chrome/browser/ui/cocoa/autofill/autofill_loading_shield_controller.mm

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import "chrome/browser/ui/cocoa/autofill/autofill_loading_shield_controller.h"
   6
   7 #include <cmath>
   8
   9 #include "base/strings/sys_string_conversions.h"
  10 #include "chrome/browser/ui/autofill/autofill_dialog_view_delegate.h"
  11 #include "chrome/browser/ui/autofill/loading_animation.h"
  12 #include "ui/base/resource/resource_bundle.h"
  13 #include "ui/gfx/animation/animation_delegate.h"
  14 #include "ui/gfx/font_list.h"
  15
  16 namespace {
  17
  18 // Horizontal spacing between the animated dots.
  19 // Using a negative spacing creates an ellipsis-like effect.
  20 // TODO(isherman): Consider using the recipe below instead:
  21 //   Create NSBezierPath
  22 //   -[NSBezierPath appendBezierPathWithGlyph:inFont:]
  23 //   -[NSBezierPath bounds]
  24 const CGFloat kDotsHorizontalPadding = -6;
  25
  26 }  // namespace
  27
  28
  29 // A C++ bridge class for driving the animation.
  30 class AutofillLoadingAnimationBridge : public gfx::AnimationDelegate {
  31  public:
  32   AutofillLoadingAnimationBridge(AutofillLoadingShieldController* controller,
  33                                  int font_size)
  34       : animation_(this, font_size),
  35         controller_(controller) {}
  36   ~AutofillLoadingAnimationBridge() override {}
  37
  38   // gfx::AnimationDelegate implementation.
  39   void AnimationProgressed(const gfx::Animation* animation) override {
  40     DCHECK_EQ(animation, &animation_);
  41     [controller_ relayoutDotsForSteppedAnimation:animation_];
  42   }
  43
  44   autofill::LoadingAnimation* animation() { return &animation_; }
  45
  46  private:
  47   autofill::LoadingAnimation animation_;
  48   AutofillLoadingShieldController* const controller_;  // weak, owns |this|
  49 };
  50
  51
  52 @implementation AutofillLoadingShieldController
  53
  54 - (id)initWithDelegate:(autofill::AutofillDialogViewDelegate*)delegate {
  55   if (self = [super initWithNibName:nil bundle:nil]) {
  56     delegate_ = delegate;
  57
  58     const gfx::FontList& font_list =
  59         ui::ResourceBundle::GetSharedInstance().GetFontList(
  60             ui::ResourceBundle::LargeFont);
  61     NSFont* native_font = font_list.GetPrimaryFont().GetNativeFont();
  62     animationDriver_.reset(
  63         new AutofillLoadingAnimationBridge(self, font_list.GetHeight()));
  64
  65     base::scoped_nsobject<NSBox> view([[NSBox alloc] initWithFrame:NSZeroRect]);
  66     [view setBoxType:NSBoxCustom];
  67     [view setBorderType:NSNoBorder];
  68     [view setContentViewMargins:NSZeroSize];
  69     [view setTitlePosition:NSNoTitle];
  70
  71     message_.reset([[NSTextField alloc] initWithFrame:NSZeroRect]);
  72     [message_ setFont:native_font];
  73     [message_ setEditable:NO];
  74     [message_ setBordered:NO];
  75     [message_ setDrawsBackground:NO];
  76     [view addSubview:message_];
  77
  78     dots_.reset([[NSArray alloc] initWithArray:@[
  79          [[NSTextField alloc] initWithFrame:NSZeroRect],
  80          [[NSTextField alloc] initWithFrame:NSZeroRect],
  81          [[NSTextField alloc] initWithFrame:NSZeroRect] ]]);
  82     NSInteger tag = 0;
  83     for (NSTextField* dot in dots_.get()) {
  84       [dot setFont:native_font];
  85       [dot setEditable:NO];
  86       [dot setBordered:NO];
  87       [dot setDrawsBackground:NO];
  88       [dot setStringValue:@"."];
  89       [dot setTag:tag];
  90       [dot sizeToFit];
  91       [view addSubview:dot];
  92
  93       ++tag;
  94     }
  95
  96     [self setView:view];
  97   }
  98   return self;
  99 }
 100
 101 - (void)update {
 102   NSString* newMessage = @"";
 103   if (delegate_->ShouldShowSpinner())
 104     newMessage = base::SysUTF16ToNSString(delegate_->SpinnerText());
 105
 106   if ([newMessage isEqualToString:[message_ stringValue]])
 107     return;
 108
 109   [message_ setStringValue:newMessage];
 110   [message_ sizeToFit];
 111
 112   if ([newMessage length] > 0) {
 113     [[self view] setHidden:NO];
 114     animationDriver_->animation()->Start();
 115   } else {
 116     [[self view] setHidden:YES];
 117     animationDriver_->animation()->Reset();
 118   }
 119
 120   NSWindowController* delegate = [[[self view] window] windowController];
 121   if ([delegate respondsToSelector:@selector(requestRelayout)])
 122     [delegate performSelector:@selector(requestRelayout)];
 123 }
 124
 125 - (NSSize)preferredSize {
 126   NOTREACHED();  // Only implemented as part of AutofillLayout protocol.
 127   return NSZeroSize;
 128 }
 129
 130 - (void)performLayout {
 131   if ([[self view] isHidden])
 132     return;
 133
 134   NSRect bounds = [[self view] bounds];
 135   NSRect messageFrame = [message_ frame];
 136
 137   NSSize size = messageFrame.size;
 138   for (NSView* dot in dots_.get()) {
 139     size.width += NSWidth([dot frame]) + kDotsHorizontalPadding;
 140     size.height = std::max(size.height, NSHeight([dot frame]));
 141   }
 142
 143   // The message + dots should be centered in the view.
 144   messageFrame.origin.x = std::ceil((NSWidth(bounds) - size.width) / 2.0);
 145   messageFrame.origin.y = std::ceil((NSHeight(bounds) - size.height) / 2.0);
 146   [message_ setFrameOrigin:messageFrame.origin];
 147
 148   NSView* previousView = message_;
 149   for (NSView* dot in dots_.get()) {
 150     NSPoint dotFrameOrigin =
 151         NSMakePoint(NSMaxX([previousView frame]) + kDotsHorizontalPadding,
 152                     messageFrame.origin.y);
 153     [dot setFrameOrigin:dotFrameOrigin];
 154
 155     previousView = dot;
 156   }
 157 }
 158
 159 - (void)relayoutDotsForSteppedAnimation:
 160     (const autofill::LoadingAnimation&)animation {
 161   for (NSView* dot in dots_.get()) {
 162     NSPoint origin = [dot frame].origin;
 163     origin.y = [message_ frame].origin.y -
 164         animation.GetCurrentValueForDot([dot tag]);
 165     [dot setFrameOrigin:origin];
 166   }
 167 }
 168
 169 @end