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