src/content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.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 #include "base/strings/sys_string_conversions.h"
   6 #import "content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h"
   7 #import "content/browser/renderer_host/render_widget_host_view_mac.h"
   8
   9 namespace content {
  10
  11 RenderWidgetHostViewMacDictionaryHelper::
  12     RenderWidgetHostViewMacDictionaryHelper(RenderWidgetHostView* view)
  13     : view_(static_cast<RenderWidgetHostViewMac*>(view)),
  14       target_view_(static_cast<RenderWidgetHostViewMac*>(view)) {
  15 }
  16
  17 void RenderWidgetHostViewMacDictionaryHelper::SetTargetView(
  18     RenderWidgetHostView* target_view) {
  19   target_view_ = static_cast<RenderWidgetHostViewMac*>(target_view);
  20 }
  21
  22 void RenderWidgetHostViewMacDictionaryHelper::ShowDefinitionForSelection() {
  23   NSRange selection_range = [view_->cocoa_view() selectedRange];
  24   NSAttributedString* attr_string =
  25       [view_->cocoa_view() attributedSubstringForProposedRange:selection_range
  26                                            actualRange:nil];
  27   if (!attr_string) {
  28     if (view_->selected_text().empty())
  29       return;
  30     // The PDF plugin does not support getting the attributed string. Until it
  31     // does, use NSPerformService(), which opens Dictionary.app.
  32     // http://crbug.com/152438
  33     // TODO(asvitkine): This should be removed after the above support is added.
  34     NSString* text = base::SysUTF8ToNSString(view_->selected_text());
  35     NSPasteboard* pasteboard = [NSPasteboard pasteboardWithUniqueName];
  36     NSArray* types = [NSArray arrayWithObject:NSStringPboardType];
  37     [pasteboard declareTypes:types owner:nil];
  38     if ([pasteboard setString:text forType:NSStringPboardType])
  39       NSPerformService(@"Look Up in Dictionary", pasteboard);
  40     return;
  41   }
  42
  43   NSRect rect =
  44       [view_->cocoa_view() firstViewRectForCharacterRange:selection_range
  45                                               actualRange:nil];
  46
  47   NSDictionary* attrs = [attr_string attributesAtIndex:0 effectiveRange:nil];
  48   NSFont* font = [attrs objectForKey:NSFontAttributeName];
  49   rect.origin.y += NSHeight(rect) - [font ascender];
  50
  51   rect.origin.x += offset_.x();
  52   rect.origin.y += offset_.y();
  53
  54   [target_view_->cocoa_view() showDefinitionForAttributedString:attr_string
  55                                                         atPoint:rect.origin];
  56 }
  57
  58 }  // namespace content