Mac: Draw download item background like windows does if a theme is installed.

chrome/browser/cocoa/download_item_cell.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 "chrome/browser/cocoa/download_item_cell.h"
 
 #include "app/gfx/canvas_paint.h"
 #include "app/gfx/text_elider.h"
 #include "app/l10n_util.h"
 #include "base/mac_util.h"
@@ skipping 70 matching lines @@
                 animationCurve:(NSAnimationCurve)animationCurve;
 @end
 
 @interface DownloadItemCell(Private)
 - (void)updateTrackingAreas:(id)sender;
 - (void)hideSecondaryTitle;
 - (void)animation:(NSAnimation*)animation
        progressed:(NSAnimationProgress)progress;
 - (NSString*)elideTitle:(int)availableWidth;
 - (NSString*)elideStatus:(int)availableWidth;
+- (GTMTheme*)backgroundTheme:(NSView*)controlView;
 @end
 
 @implementation DownloadItemCell
 
 @synthesize secondaryTitle = secondaryTitle_;
 @synthesize secondaryFont = secondaryFont_;
 
 - (void)setInitialState {
   isStatusTextVisible_ = NO;
   titleY_ = kPrimaryTextPosTop;
@@ skipping 214 matching lines @@
   gfx::Font font_chr =
       gfx::Font::CreateFont(base::SysNSStringToWide([font fontName]),
                             [font pointSize]);
 
   return base::SysWideToNSString(ElideText(
       base::SysNSStringToWide([self secondaryTitle]),
       font_chr,
       availableWidth));
 }
 
+- (GTMTheme*)backgroundTheme:(NSView*)controlView {
+  if (!theme_) {
+    theme_.reset([[GTMTheme alloc] init]);
+    NSColor* bgColor = [NSColor colorWithCalibratedRed:241/255.0
+                                                 green:245/255.0
+                                                  blue:250/255.0 
+                                                 alpha:77/255.0];
+    NSColor* clickedColor = [NSColor colorWithCalibratedRed:239/255.0
+                                                      green:245/255.0
+                                                       blue:252/255.0
+                                                      alpha:51/255.0];

[Avi (use Gerrit), 2009/11/13 16:13:59]

File a bug to get these colors from the theme. We shouldn't be hard-coding
colors everywhere :(

[Nico, 2009/11/13 16:23:07]

No, these colors should be hardcoded. If the current theme is not the default
theme, we always want these fixed colors, no matter the theme.

+
+    NSColor* borderColor = [NSColor colorWithCalibratedWhite:0 alpha:36/255.0];
+    scoped_nsobject<NSGradient> bgGradient([[NSGradient alloc]
+        initWithColors:[NSArray arrayWithObject:bgColor]]);
+    scoped_nsobject<NSGradient> clickedGradient([[NSGradient alloc]
+        initWithColors:[NSArray arrayWithObject:clickedColor]]);
+ 
+    GTMThemeState states[] = {
+        GTMThemeStateActiveWindow, GTMThemeStateInactiveWindow
+    };
+
+    for (size_t i = 0; i < arraysize(states); ++i) {
+      [theme_.get() setValue:bgGradient
+                forAttribute:@"gradient"
+                       style:GTMThemeStyleToolBarButton
+                       state:states[i]];
+
+      [theme_.get() setValue:clickedGradient
+                forAttribute:@"gradient"
+                       style:GTMThemeStyleToolBarButtonPressed
+                       state:states[i]];
+
+      [theme_.get() setValue:borderColor
+                forAttribute:@"iconColor"
+                       style:GTMThemeStyleToolBarButton
+                       state:states[i]];
+    }
+  }
+  return theme_.get();
+}
+
 - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView*)controlView {
   // Constants from Cole.  Will kConstant them once the feedback loop
   // is complete.
   NSRect drawFrame = NSInsetRect(cellFrame, 1.5, 1.5);
   NSRect innerFrame = NSInsetRect(cellFrame, 2, 2);
 
   const float radius = 5;
   NSWindow* window = [controlView window];
   BOOL active = [window isKeyWindow] || [window isMainWindow];
 
+  // In the default theme, draw download items with the bookmark button
+  // gradient. For some themes, this leads to unreadable text, so draw the item
+  // with a background that looks like windows (some transparent white) if a
+  // theme is used. Use custom theme object with a white color gradient to trick
+  // the superclass into drawing what we want.
   GTMTheme* theme = [controlView gtm_theme];
+  bool isDefaultTheme = [theme
+      backgroundImageForStyle:GTMThemeStyleToolBarButton state:YES] == nil;
+
+  NSGradient* bgGradient = nil;
+  if (!isDefaultTheme) {
+    theme = [self backgroundTheme:controlView];
+    bgGradient = [theme gradientForStyle:GTMThemeStyleToolBarButton
+                                   state:active];
+  }
 
   NSRect buttonDrawRect, dropdownDrawRect;
   NSDivideRect(drawFrame, &dropdownDrawRect, &buttonDrawRect,
       kDropdownAreaWidth, NSMaxXEdge);
 
   NSBezierPath* buttonInnerPath = [self
       leftRoundedPath:radius inRect:buttonDrawRect];
   NSBezierPath* buttonOuterPath = [self
       leftRoundedPath:(radius + 1)
                inRect:NSInsetRect(buttonDrawRect, -1, -1)];
 
   NSBezierPath* dropdownInnerPath = [self
       rightRoundedPath:radius inRect:dropdownDrawRect];
   NSBezierPath* dropdownOuterPath = [self
       rightRoundedPath:(radius + 1)
                 inRect:NSInsetRect(dropdownDrawRect, -1, -1)];
 
   // Stroke the borders and appropriate fill gradient.
   [self drawBorderAndFillForTheme:theme
                       controlView:controlView
                         outerPath:buttonOuterPath
                         innerPath:buttonInnerPath
               showClickedGradient:[self isButtonPartPressed]
             showHighlightGradient:[self isMouseOverButtonPart]
                        hoverAlpha:0.0
                            active:active
-                        cellFrame:cellFrame];
+                        cellFrame:cellFrame
+                  defaultGradient:bgGradient];
 
-  [self drawBorderAndFillForTheme: theme
+  [self drawBorderAndFillForTheme:theme
                       controlView:controlView
                         outerPath:dropdownOuterPath
                         innerPath:dropdownInnerPath
               showClickedGradient:[self isDropdownPartPressed]
             showHighlightGradient:[self isMouseOverDropdownPart]
                        hoverAlpha:0.0
                            active:active
-                        cellFrame:cellFrame];
+                        cellFrame:cellFrame
+                  defaultGradient:bgGradient];
 
   [self drawInteriorWithFrame:innerFrame inView:controlView];
 }
 
 - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView*)controlView {
   // Draw title
   CGFloat textWidth = cellFrame.size.width -
       (kTextPosLeft + kTextPaddingRight + kDropdownAreaWidth);
   [self setTitle:[self elideTitle:textWidth]];
 
@@ skipping 173 matching lines @@
   }
   return self;
 }
 
 - (void)setCurrentProgress:(NSAnimationProgress)progress {
   [super setCurrentProgress:progress];
   [cell_ animation:self progressed:progress];
 }
 
 @end