[Mac] Magnifying glass in keyword-search bubble.

chrome/browser/cocoa/autocomplete_text_field_cell.mm

 // Copyright (c) 2010 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/autocomplete_text_field_cell.h"
 
 #include "app/resource_bundle.h"
 #include "base/logging.h"
 #include "gfx/font.h"
+#include "grit/theme_resources.h"
 
 namespace {
 
 const CGFloat kBaselineAdjust = 2.0;
 
 // How far to offset the keyword token into the field.
 const NSInteger kKeywordXOffset = 3;
 
 // How much width (beyond text) to add to the keyword token on each
 // side.
 const NSInteger kKeywordTokenInset = 3;
 
 // Gap to leave between hint and right-hand-side of cell.
 const NSInteger kHintXOffset = 4;
 
 // How far to shift bounding box of hint down from top of field.
 // Assumes -setFlipped:YES.
 const NSInteger kHintYOffset = 4;
 
 // How far to inset the keywork token from sides.
 const NSInteger kKeywordYInset = 4;
 
 // TODO(shess): The keyword hint image wants to sit on the baseline.
 // This moves it down so that there is approximately as much image
 // above the lowercase ascender as below the baseline.  A better
 // technique would be nice to have, though.
 const NSInteger kKeywordHintImageBaseline = -6;
 
+// Drops the magnifying glass icon so that it looks centered in the
+// keyword-search bubble.
+const NSInteger kKeywordSearchImageBaseline = -4;
+
 // The amount of padding on either side reserved for drawing an icon.
 const NSInteger kIconHorizontalPad = 3;
 
 // How far to shift bounding box of hint icon label down from top of field.
 const NSInteger kIconLabelYOffset = 7;
 
 // How far the editor insets itself, for purposes of determining if
 // decorations need to be trimmed.
 const CGFloat kEditorHorizontalInset = 3.0;
 
@@ skipping 15 matching lines @@
   // If there is an image, make sure we calculated the target size
   // correctly.
   DCHECK(!image || NSEqualSizes([image size], rect.size));
   [image setFlipped:[view isFlipped]];
   [image drawInRect:rect
            fromRect:NSZeroRect  // Entire image
           operation:NSCompositeSourceOver
            fraction:1.0];
 }
 
+// Helper function to generate an attributed string containing
+// |anImage|.  If |baselineAdjustment| is 0, the image sits on the
+// text baseline, positive values shift it up, negative values shift
+// it down.
+NSAttributedString* AttributedStringForImage(NSImage* anImage,
+                                             CGFloat baselineAdjustment) {
+  scoped_nsobject<NSTextAttachmentCell> attachmentCell(
+      [[NSTextAttachmentCell alloc] initImageCell:anImage]);
+  scoped_nsobject<NSTextAttachment> attachment(
+      [[NSTextAttachment alloc] init]);
+  [attachment setAttachmentCell:attachmentCell];
+
+  scoped_nsobject<NSMutableAttributedString> as(
+      [[NSAttributedString attributedStringWithAttachment:attachment]
+        mutableCopy]);
+  [as addAttribute:NSBaselineOffsetAttributeName
+      value:[NSNumber numberWithFloat:baselineAdjustment]
+      range:NSMakeRange(0, [as length])];
+
+  return [[as copy] autorelease];
+}
+
 }  // namespace
 
 @implementation AutocompleteTextFieldIcon
 
 @synthesize rect = rect_;
 @synthesize view = view_;
 
 // Private helper.
 - (id)initWithView:(LocationBarViewMac::LocationBarImageView*)view
            isLabel:(BOOL)isLabel {
@@ skipping 61 matching lines @@
 - (void)setKeywordString:(NSString*)fullString
            partialString:(NSString*)partialString
           availableWidth:(CGFloat)width {
   DCHECK(fullString != nil);
 
   hintString_.reset();
 
   // Adjust for space between editor and decorations.
   width -= 2 * kEditorHorizontalInset;
 
-  // If |fullString| won't fit, choose |partialString|.
+  // Get the magnifying glass to put at the front of the string.
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  NSImage* image = rb.GetNSImageNamed(IDR_O2_SEARCH);
+  const NSSize imageSize = [image size];
+
+  // Based on what fits, choose |fullString| with the image,
+  // |fullString| without the image, or |partialString|.
   NSDictionary* attributes =
       [NSDictionary dictionaryWithObject:[self font]
                                   forKey:NSFontAttributeName];
   NSString* s = fullString;
-  if ([s sizeWithAttributes:attributes].width > width) {
+  const CGFloat sWidth = [s sizeWithAttributes:attributes].width;
+  if (sWidth + imageSize.width > width) {
+    image = nil;
+  }
+  if (sWidth > width) {
     if (partialString) {
       s = partialString;
     }
   }
-  keywordString_.reset(
-      [[NSAttributedString alloc] initWithString:s attributes:attributes]);
+
+  scoped_nsobject<NSMutableAttributedString> as(
+      [[NSMutableAttributedString alloc] initWithString:s
+                                             attributes:attributes]);
+
+  // Insert the image at the front of the string if it didn't make
+  // things too wide.
+  if (image) {
+    NSAttributedString* is =
+        AttributedStringForImage(image, kKeywordSearchImageBaseline);
+    [as insertAttributedString:is atIndex:0];
+  }
+
+  keywordString_.reset([as copy]);
 }
 
 // Convenience for the attributes used in the right-justified info
 // cells.
 - (NSDictionary*)hintAttributes {
   scoped_nsobject<NSMutableParagraphStyle> style(
       [[NSMutableParagraphStyle alloc] init]);
   [style setAlignment:NSRightTextAlignment];
 
   return [NSDictionary dictionaryWithObjectsAndKeys:
@@ skipping 27 matching lines @@
       ![[hintString_ string] hasSuffix:suffixString]) {
 
     // Build an attributed string with the concatenation of the prefix
     // and suffix.
     NSString* s = [prefixString stringByAppendingString:suffixString];
     scoped_nsobject<NSMutableAttributedString> as(
         [[NSMutableAttributedString alloc]
           initWithString:s attributes:[self hintAttributes]]);
 
     // Build an attachment containing the hint image.
-    scoped_nsobject<NSTextAttachmentCell> attachmentCell(
-        [[NSTextAttachmentCell alloc] initImageCell:anImage]);
-    scoped_nsobject<NSTextAttachment> attachment(
-        [[NSTextAttachment alloc] init]);
-    [attachment setAttachmentCell:attachmentCell];
-
-    // The attachment's baseline needs to be adjusted so the image
-    // doesn't sit on the same baseline as the text and make
-    // everything too tall.
-    scoped_nsobject<NSMutableAttributedString> is(
-        [[NSAttributedString attributedStringWithAttachment:attachment]
-          mutableCopy]);
-    [is addAttribute:NSBaselineOffsetAttributeName
-        value:[NSNumber numberWithFloat:kKeywordHintImageBaseline]
-        range:NSMakeRange(0, [is length])];
+    NSAttributedString* is =
+        AttributedStringForImage(anImage, kKeywordHintImageBaseline);
 
     // Stuff the image attachment between the prefix and suffix.
     [as insertAttributedString:is atIndex:[prefixString length]];
 
     // If too wide, just show the image.
     hintString_.reset(WidthForHint(as) > width ? [is copy] : [as copy]);
   }
 }
 
 - (void)setSearchHintString:(NSString*)aString
@@ skipping 186 matching lines @@
   [[NSColor selectedControlColor] set];
   [path fill];
 
   // Border around token rectangle, match focus ring's inner color.
   [[[NSColor keyboardFocusIndicatorColor] colorWithAlphaComponent:0.5] set];
   [path setLineWidth:1.0];
   [path stroke];
 
   // Draw text w/in the rectangle.
   infoFrame.origin.x += 4.0;
-  infoFrame.origin.y += 1.0;
   [keywordString_.get() drawInRect:infoFrame];
 }
 
 - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView*)controlView {
   if (!keywordString_ && locationIconView_ && locationIconView_->IsVisible()) {
     DrawImageInRect(locationIconView_->GetImage(), controlView,
                     [self locationIconFrameForFrame:cellFrame]);
   }
 
   if (hintString_) {
@@ skipping 112 matching lines @@
       icon = [self iconForEvent:theEvent inRect:cellFrame ofView:controlView];
   if (icon) {
     [icon view]->OnMousePressed([icon rect]);
     return YES;
   }
 
   return NO;
 }
 
 @end