Enable custom MIME types in web copy/paste.

ui/base/clipboard/clipboard_gtk.cc

 // Copyright (c) 2011 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.
 
 #include "ui/base/clipboard/clipboard.h"
 
 #include <gtk/gtk.h>
 #include <X11/extensions/Xfixes.h>
 #include <X11/Xatom.h>
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/clipboard/custom_data_helper.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/gtk_util.h"
 #include "ui/gfx/size.h"
 
 namespace ui {
 
 namespace {
 
@@ skipping 69 matching lines @@
     } else {
       DLOG(ERROR) << "Unexpected selection atom: " << ev->selection;
     }
   }
   return GDK_FILTER_CONTINUE;
 }
 
 const char kMimeTypeBitmap[] = "image/bmp";
 const char kMimeTypeMozillaURL[] = "text/x-moz-url";
 const char kMimeTypeWebkitSmartPaste[] = "chromium/x-webkit-paste";
+const char kMimeTypeWebCustomData[] = "chromium/x-web-custom-data";

[tony, 2011/12/05 18:40:39]

We want this data to be interoperable with other browsers.  Putting chromium in
the name seems to work against that.  We should work with other browser vendors
and Hixie to get the actual type name speced.

 
 std::string GdkAtomToString(const GdkAtom& atom) {
   gchar* name = gdk_atom_name(atom);
   std::string rv(name);
   g_free(name);
   return rv;
 }
 
 GdkAtom StringToGdkAtom(const std::string& str) {
   return gdk_atom_intern(str.c_str(), FALSE);
@@ skipping 264 matching lines @@
   }
 
   types->clear();
   if (IsFormatAvailable(GetPlainTextFormatType(), buffer))
     types->push_back(UTF8ToUTF16(kMimeTypeText));
   if (IsFormatAvailable(GetHtmlFormatType(), buffer))
     types->push_back(UTF8ToUTF16(kMimeTypeHTML));
   if (IsFormatAvailable(GetBitmapFormatType(), buffer))
     types->push_back(UTF8ToUTF16(kMimeTypePNG));
   *contains_filenames = false;
+
+  GtkClipboard* clipboard = LookupBackingClipboard(buffer);
+  DCHECK(clipboard);
+  GtkSelectionData* data = gtk_clipboard_wait_for_contents(
+      clipboard, StringToGdkAtom(GetWebCustomDataFormatType()));
+  if (!data)
+    return;
+  ReadCustomDataTypes(data->data, data->length, types);
+  gtk_selection_data_free(data);
 }
 
 
 void Clipboard::ReadText(Clipboard::Buffer buffer, string16* result) const {
   GtkClipboard* clipboard = LookupBackingClipboard(buffer);
   if (clipboard == NULL)
     return;
 
   result->clear();
   gchar* text = gtk_clipboard_wait_for_text(clipboard);
@@ skipping 81 matching lines @@
     cairo_t* context = scoped_platform_paint.GetPlatformSurface();
     gdk_cairo_set_source_pixbuf(context, pixbuf.get(), 0.0, 0.0);
     cairo_paint(context);
   }
   return canvas.ExtractBitmap();
 }
 
 void Clipboard::ReadCustomData(Buffer buffer,
                                const string16& type,
                                string16* result) const {
-  // TODO(dcheng): Implement this.
-  NOTIMPLEMENTED();
+  GtkClipboard* clipboard = LookupBackingClipboard(buffer);
+  if (!clipboard)
+    return;
+
+  GtkSelectionData* data = gtk_clipboard_wait_for_contents(
+      clipboard, StringToGdkAtom(GetWebCustomDataFormatType()));
+  if (!data)
+    return;
+  ReadCustomDataForType(data->data, data->length, type, result);
+  gtk_selection_data_free(data);
 }
 
 void Clipboard::ReadBookmark(string16* title, std::string* url) const {
   // TODO(estade): implement this.
   NOTIMPLEMENTED();
 }
 
 void Clipboard::ReadData(const std::string& format, std::string* result) {
   GtkSelectionData* data =
       gtk_clipboard_wait_for_contents(clipboard_, StringToGdkAtom(format));
@@ skipping 28 matching lines @@
 // static
 Clipboard::FormatType Clipboard::GetBitmapFormatType() {
   return std::string(kMimeTypeBitmap);
 }
 
 // static
 Clipboard::FormatType Clipboard::GetWebKitSmartPasteFormatType() {
   return std::string(kMimeTypeWebkitSmartPaste);
 }
 
+// static
+Clipboard::FormatType Clipboard::GetWebCustomDataFormatType() {
+  return std::string(kMimeTypeWebCustomData);
+}
+
 void Clipboard::InsertMapping(const char* key,
                               char* data,
                               size_t data_len) {
   DCHECK(clipboard_data_->find(key) == clipboard_data_->end());
   (*clipboard_data_)[key] = std::make_pair(data, data_len);
 }
 
 GtkClipboard* Clipboard::LookupBackingClipboard(Buffer clipboard) const {
   switch (clipboard) {
     case BUFFER_STANDARD:
       return clipboard_;
     case BUFFER_SELECTION:
       return primary_selection_;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace ui