chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm

   1 // Copyright (c) 2012 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 #include "chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h"
   6
   7 #include "base/mac/scoped_nsobject.h"
   8 #import "chrome/browser/themes/theme_properties.h"
   9 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
  10 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
  11 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
  12 #import "chrome/browser/ui/cocoa/nsview_additions.h"
  13 #import "chrome/browser/ui/cocoa/themed_window.h"
  14 #include "components/infobars/core/infobar.h"
  15 #include "skia/ext/skia_utils_mac.h"
  16 #include "ui/base/theme_provider.h"
  17
  18 @implementation InfoBarGradientView
  19
  20 @synthesize arrowHeight = arrowHeight_;
  21 @synthesize arrowHalfWidth = arrowHalfWidth_;
  22 @synthesize arrowX = arrowX_;
  23 @synthesize hasTip = hasTip_;
  24
  25 - (id)initWithFrame:(NSRect)frame {
  26   if ((self = [super initWithFrame:frame])) {
  27     hasTip_ = YES;
  28   }
  29   return self;
  30 }
  31
  32 - (id)initWithCoder:(NSCoder*)decoder {
  33   if ((self = [super initWithCoder:decoder])) {
  34     hasTip_ = YES;
  35   }
  36   return self;
  37 }
  38
  39 - (void)setInfobarType:(infobars::InfoBarDelegate::Type)infobarType {
  40   SkColor topColor = infobars::InfoBar::GetTopColor(infobarType);
  41   SkColor bottomColor = infobars::InfoBar::GetBottomColor(infobarType);
  42   base::scoped_nsobject<NSGradient> gradient([[NSGradient alloc]
  43       initWithStartingColor:gfx::SkColorToCalibratedNSColor(topColor)
  44                 endingColor:gfx::SkColorToCalibratedNSColor(bottomColor)]);
  45   [self setGradient:gradient];
  46 }
  47
  48 - (NSColor*)strokeColor {
  49   ui::ThemeProvider* themeProvider = [[self window] themeProvider];
  50   if (!themeProvider)
  51     return [NSColor blackColor];
  52
  53   BOOL active = [[self window] isMainWindow];
  54   return themeProvider->GetNSColor(
  55       active ? ThemeProperties::COLOR_TOOLBAR_STROKE :
  56                ThemeProperties::COLOR_TOOLBAR_STROKE_INACTIVE);
  57 }
  58
  59 - (void)drawRect:(NSRect)rect {
  60   NSRect bounds = [self bounds];
  61   bounds.size.height = infobars::InfoBar::kDefaultBarTargetHeight;
  62
  63   CGFloat tipXOffset = arrowX_ - arrowHalfWidth_;
  64
  65   // Around the bounds of the infobar, continue drawing the path into which the
  66   // gradient will be drawn.
  67   NSBezierPath* infoBarPath = [NSBezierPath bezierPath];
  68   [infoBarPath moveToPoint:NSMakePoint(NSMinX(bounds), NSMaxY(bounds))];
  69
  70   // Draw the tip.
  71   if (hasTip_) {
  72     [infoBarPath lineToPoint:NSMakePoint(tipXOffset, NSMaxY(bounds))];
  73     [infoBarPath relativeLineToPoint:NSMakePoint(arrowHalfWidth_,
  74                                                  arrowHeight_)];
  75     [infoBarPath relativeLineToPoint:NSMakePoint(arrowHalfWidth_,
  76                                                  -arrowHeight_)];
  77   }
  78   [infoBarPath lineToPoint:NSMakePoint(NSMaxX(bounds), NSMaxY(bounds))];
  79
  80   // Save off the top path of the infobar.
  81   base::scoped_nsobject<NSBezierPath> topPath([infoBarPath copy]);
  82
  83   [infoBarPath lineToPoint:NSMakePoint(NSMaxX(bounds), NSMinY(bounds))];
  84   [infoBarPath lineToPoint:NSMakePoint(NSMinX(bounds), NSMinY(bounds))];
  85   [infoBarPath closePath];
  86
  87   // Draw the gradient.
  88   [[self gradient] drawInBezierPath:infoBarPath angle:270];
  89
  90   NSColor* strokeColor = [self strokeColor];
  91   if (strokeColor) {
  92     [strokeColor set];
  93
  94     // Stroke the bottom of the infobar.
  95     NSRect borderRect, contentRect;
  96     NSDivideRect(bounds, &borderRect, &contentRect, 1, NSMinYEdge);
  97     NSRectFillUsingOperation(borderRect, NSCompositeSourceOver);
  98
  99     // Re-stroke the top because the tip will have no stroke. This will draw
 100     // over the divider drawn by the bottom of the tabstrip.
 101     [topPath stroke];
 102   }
 103
 104   // Add an inner stroke.
 105   const CGFloat kHighlightTipHeight = arrowHeight_ - 1;
 106   NSBezierPath* highlightPath = [NSBezierPath bezierPath];
 107   [highlightPath moveToPoint:NSMakePoint(NSMinX(bounds), NSMaxY(bounds) - 1)];
 108   if (hasTip_) {
 109     [highlightPath relativeLineToPoint:NSMakePoint(tipXOffset + 1, 0)];
 110     [highlightPath relativeLineToPoint:NSMakePoint(arrowHalfWidth_ - 1,
 111                                                    kHighlightTipHeight)];
 112     [highlightPath relativeLineToPoint:NSMakePoint(arrowHalfWidth_ - 1,
 113                                                    -kHighlightTipHeight)];
 114   }
 115   [highlightPath lineToPoint:NSMakePoint(NSMaxX(bounds), NSMaxY(bounds) - 1)];
 116
 117   [[NSColor colorWithDeviceWhite:1.0 alpha:1.0] setStroke];
 118   [highlightPath stroke];
 119 }
 120
 121 - (BOOL)mouseDownCanMoveWindow {
 122   return NO;
 123 }
 124
 125 // This view is intentionally not opaque because it overlaps with the findbar.
 126
 127 - (BOOL)accessibilityIsIgnored {
 128   return NO;
 129 }
 130
 131 - (id)accessibilityAttributeValue:(NSString*)attribute {
 132   if ([attribute isEqual:NSAccessibilityRoleAttribute])
 133     return NSAccessibilityGroupRole;
 134
 135   return [super accessibilityAttributeValue:attribute];
 136 }
 137
 138 - (void)setHasTip:(BOOL)hasTip {
 139   if (hasTip_ == hasTip)
 140     return;
 141   hasTip_ = hasTip;
 142   [self setNeedsDisplay:YES];
 143 }
 144
 145 @end