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// Copyright (c) 2012 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/renderer/text_input_client_observer.h"
#include <stddef.h>
#include <memory>
#include "build/build_config.h"
#include "content/common/text_input_client_messages.h"
#include "content/renderer/pepper/pepper_plugin_instance_impl.h"
#include "content/renderer/render_frame_impl.h"
#include "content/renderer/render_view_impl.h"
#include "content/renderer/render_widget.h"
#include "ipc/ipc_message.h"
#include "ppapi/features/features.h"
#include "third_party/WebKit/public/platform/WebPoint.h"
#include "third_party/WebKit/public/platform/WebRect.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "ui/gfx/geometry/rect.h"
#if defined(OS_MACOSX)
#include "third_party/WebKit/public/web/mac/WebSubstringUtil.h"
#endif
namespace content {
namespace {
uint32_t GetCurrentCursorPositionInFrame(blink::WebLocalFrame* localFrame) {
blink::WebRange range = localFrame->SelectionRange();
return range.IsNull() ? 0U : static_cast<uint32_t>(range.StartOffset());
}
}
TextInputClientObserver::TextInputClientObserver(RenderWidget* render_widget)
: render_widget_(render_widget) {}
TextInputClientObserver::~TextInputClientObserver() {
}
bool TextInputClientObserver::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(TextInputClientObserver, message)
IPC_MESSAGE_HANDLER(TextInputClientMsg_StringAtPoint,
OnStringAtPoint)
IPC_MESSAGE_HANDLER(TextInputClientMsg_CharacterIndexForPoint,
OnCharacterIndexForPoint)
IPC_MESSAGE_HANDLER(TextInputClientMsg_FirstRectForCharacterRange,
OnFirstRectForCharacterRange)
IPC_MESSAGE_HANDLER(TextInputClientMsg_StringForRange, OnStringForRange)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
bool TextInputClientObserver::Send(IPC::Message* message) {
return render_widget_->Send(message);
}
blink::WebFrameWidget* TextInputClientObserver::GetWebFrameWidget() const {
blink::WebWidget* widget = render_widget_->GetWebWidget();
if (!widget->IsWebFrameWidget()) {
// When a page navigation occurs, for a brief period
// RenderViewImpl::GetWebWidget() will return a WebViewImpl instead of a
// WebViewFrameWidget. Therefore, casting to WebFrameWidget is invalid and
// could cause crashes. Also, WebView::mainFrame() could be a remote frame
// which will yield a nullptr for localRoot() (https://crbug.com/664890).
return nullptr;
}
return static_cast<blink::WebFrameWidget*>(widget);
}
blink::WebLocalFrame* TextInputClientObserver::GetFocusedFrame() const {
if (auto* frame_widget = GetWebFrameWidget()) {
blink::WebLocalFrame* localRoot = frame_widget->LocalRoot();
RenderFrameImpl* render_frame = RenderFrameImpl::FromWebFrame(localRoot);
if (!render_frame) {
// TODO(ekaramad): Can this ever be nullptr? (https://crbug.com/664890).
return nullptr;
}
blink::WebLocalFrame* focused =
render_frame->render_view()->webview()->FocusedFrame();
return focused->LocalRoot() == localRoot ? focused : nullptr;
}
return nullptr;
}
#if BUILDFLAG(ENABLE_PLUGINS)
PepperPluginInstanceImpl* TextInputClientObserver::GetFocusedPepperPlugin()
const {
blink::WebLocalFrame* focusedFrame = GetFocusedFrame();
return focusedFrame
? RenderFrameImpl::FromWebFrame(focusedFrame)
->focused_pepper_plugin()
: nullptr;
}
#endif
void TextInputClientObserver::OnStringAtPoint(gfx::Point point) {
#if defined(OS_MACOSX)
blink::WebPoint baselinePoint;
NSAttributedString* string = nil;
if (auto* frame_widget = GetWebFrameWidget()) {
string = blink::WebSubstringUtil::AttributedWordAtPoint(frame_widget, point,
baselinePoint);
}
std::unique_ptr<const mac::AttributedStringCoder::EncodedString> encoded(
mac::AttributedStringCoder::Encode(string));
Send(new TextInputClientReplyMsg_GotStringAtPoint(
render_widget_->routing_id(), *encoded.get(), baselinePoint));
#else
NOTIMPLEMENTED();
#endif
}
void TextInputClientObserver::OnCharacterIndexForPoint(gfx::Point point) {
blink::WebPoint web_point(point);
uint32_t index = 0U;
if (auto* frame = GetFocusedFrame())
index = static_cast<uint32_t>(frame->CharacterIndexForPoint(web_point));
Send(new TextInputClientReplyMsg_GotCharacterIndexForPoint(
render_widget_->routing_id(), index));
}
void TextInputClientObserver::OnFirstRectForCharacterRange(gfx::Range range) {
gfx::Rect rect;
#if BUILDFLAG(ENABLE_PLUGINS)
PepperPluginInstanceImpl* focused_plugin = GetFocusedPepperPlugin();
if (focused_plugin) {
rect = focused_plugin->GetCaretBounds();
} else
#endif
{
blink::WebLocalFrame* frame = GetFocusedFrame();
// TODO(yabinh): Null check should not be necessary.
// See crbug.com/304341
if (frame) {
blink::WebRect web_rect;
// When request range is invalid we will try to obtain it from current
// frame selection. The fallback value will be 0.
uint32_t start = range.IsValid() ? range.start()
: GetCurrentCursorPositionInFrame(frame);
frame->FirstRectForCharacterRange(start, range.length(), web_rect);
rect = web_rect;
}
}
Send(new TextInputClientReplyMsg_GotFirstRectForRange(
render_widget_->routing_id(), rect));
}
void TextInputClientObserver::OnStringForRange(gfx::Range range) {
#if defined(OS_MACOSX)
blink::WebPoint baselinePoint;
NSAttributedString* string = nil;
blink::WebLocalFrame* frame = GetFocusedFrame();
// TODO(yabinh): Null check should not be necessary.
// See crbug.com/304341
if (frame) {
string = blink::WebSubstringUtil::AttributedSubstringInRange(
frame, range.start(), range.length(), &baselinePoint);
}
std::unique_ptr<const mac::AttributedStringCoder::EncodedString> encoded(
mac::AttributedStringCoder::Encode(string));
Send(new TextInputClientReplyMsg_GotStringForRange(
render_widget_->routing_id(), *encoded.get(), baselinePoint));
#else
NOTIMPLEMENTED();
#endif
}
} // namespace content
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