Move setToolTipText related functions from RenderView to RenderWidget.

content/browser/renderer_host/render_widget_host.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 "content/browser/renderer_host/render_widget_host.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
+#include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/accessibility/browser_accessibility_state.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/renderer_host/backing_store.h"
 #include "content/browser/renderer_host/backing_store_manager.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/user_metrics.h"
 #include "content/common/gpu/gpu_messages.h"
@@ skipping 137 matching lines @@
 }
 
 bool RenderWidgetHost::OnMessageReceived(const IPC::Message &msg) {
   bool handled = true;
   bool msg_is_ok = true;
   IPC_BEGIN_MESSAGE_MAP_EX(RenderWidgetHost, msg, msg_is_ok)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnMsgRenderViewReady)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewGone, OnMsgRenderViewGone)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnMsgClose)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnMsgRequestMove)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnMsgSetTooltipText)
     IPC_MESSAGE_HANDLER(ViewHostMsg_PaintAtSize_ACK, OnMsgPaintAtSizeAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnMsgUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_HandleInputEvent_ACK, OnMsgInputEventAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnMsgFocus)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnMsgBlur)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnMsgSetCursor)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeUpdateTextInputState,
                         OnMsgImeUpdateTextInputState)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCompositionRangeChanged,
                         OnMsgImeCompositionRangeChanged)
@@ skipping 617 matching lines @@
   // TODO(evanm): This synchronously ends up calling "delete this".
   // Is that really what we want in response to this message?  I'm matching
   // previous behavior of the code here.
   Destroy();
 }
 
 void RenderWidgetHost::OnMsgClose() {
   Shutdown();
 }
 
+void RenderWidgetHost::OnMsgSetTooltipText(
+    const std::wstring& tooltip_text,
+    WebTextDirection text_direction_hint) {
+  // First, add directionality marks around tooltip text if necessary.
+  // A naive solution would be to simply always wrap the text. However, on
+  // windows, Unicode directional embedding characters can't be displayed on
+  // systems that lack RTL fonts and are instead displayed as empty squares.
+  //
+  // To get around this we only wrap the string when we deem it necessary i.e.
+  // when the locale direction is different than the tooltip direction hint.
+  //
+  // Currently, we use element's directionality as the tooltip direction hint.
+  // An alternate solution would be to set the overall directionality based on
+  // trying to detect the directionality from the tooltip text rather than the
+  // element direction.  One could argue that would be a preferable solution
+  // but we use the current approach to match Fx & IE's behavior.
+  string16 wrapped_tooltip_text = WideToUTF16(tooltip_text);
+  if (!tooltip_text.empty()) {
+    if (text_direction_hint == WebKit::WebTextDirectionLeftToRight) {
+      // Force the tooltip to have LTR directionality.
+      wrapped_tooltip_text =
+          base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
+    } else if (text_direction_hint == WebKit::WebTextDirectionRightToLeft &&
+               !base::i18n::IsRTL()) {
+      // Force the tooltip to have RTL directionality.
+      base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
+    }
+  }
+  if (view())
+    view()->SetTooltipText(UTF16ToWide(wrapped_tooltip_text));
+}
+
 void RenderWidgetHost::OnMsgRequestMove(const gfx::Rect& pos) {
   // Note that we ignore the position.
   if (view_) {
     view_->SetBounds(pos);
     Send(new ViewMsg_Move_ACK(routing_id_));
   }
 }
 
 void RenderWidgetHost::OnMsgPaintAtSizeAck(int tag, const gfx::Size& size) {
   PaintAtSizeAckDetails details = {tag, size};
@@ skipping 455 matching lines @@
     view_->CreatePluginContainer(deferred_plugin_handles_[i]);
 #endif
   }
 
   deferred_plugin_handles_.clear();
 }
 
 void RenderWidgetHost::StartUserGesture() {
   OnUserGesture();
 }