In-te-grate hy-phen-ator to con-tent.

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
===================================================================
--- content/renderer/renderer_webkitplatformsupport_impl.cc	(revision 152650)
+++ content/renderer/renderer_webkitplatformsupport_impl.cc	(working copy)
@@ -25,6 +25,7 @@
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/gamepad_shared_memory_reader.h"
+#include "content/renderer/hyphenator/hyphenator.h"
 #include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/media/renderer_webaudiodevice_impl.h"
 #include "content/renderer/render_thread_impl.h"
@@ -737,3 +738,37 @@
 RendererWebKitPlatformSupportImpl::GetGpuChannelHostFactory() {
   return RenderThreadImpl::current();
 }
+
+//------------------------------------------------------------------------------
+
+bool RendererWebKitPlatformSupportImpl::canHyphenate(
+    const WebKit::WebString& locale) {
+  // Return false unless WebKit asks for US English dictionaries because WebKit
+  // can currently hyphenate only English words.
+  if (!locale.isEmpty() && !locale.equals("en-US"))
+    return false;
+
+  // Create a hyphenator object and attach it to the render thread so it can
+  // receive a dictionary file opened by a browser. (As of today, there are few
+  // pages that use the hyphens property and it is good to create this object
+  // only when WebKit finds a page that needs hyphenation.)

[tony, 2012/08/22 19:05:50]

Nit: I would remove the sentence in ()s.  I don't think you need to explain or
justify lazy initialization.

[Hironori Bono, 2012/08/27 06:57:28]

Done. Thanks for your suggestion.

+  if (!hyphenator_.get()) {
+    hyphenator_.reset(new content::Hyphenator(base::kInvalidPlatformFileValue));
+    if (!hyphenator_.get())
+      return false;
+    return hyphenator_->Attach(RenderThreadImpl::current(), locale);
+  }
+  return hyphenator_->CanHyphenate(locale);
+}
+
+size_t RendererWebKitPlatformSupportImpl::computeLastHyphenLocation(
+    const char16* characters,
+    size_t length,
+    size_t before_index,
+    const WebKit::WebString& locale) {
+  // Crash if WebKit calls this function when canHyphenate returns false.
+  DCHECK(locale.isEmpty() || locale.equals("en-US"));
+  DCHECK(hyphenator_.get());
+  return hyphenator_->ComputeLastHyphenLocation(string16(characters, length),
+                                                before_index);
+}