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929cd40273
cef/cef1/libcef/webwidget_host_win.cc
Marshall Greenblatt 929cd40273 Win: Fix mouse wheel scrolling in second monitor (issue #595). 
git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@635 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2012-05-18 21:58:07 +00:00

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// Copyright (c) 2008-2009 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2006-2008 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 <windows.h>
#include <commctrl.h>
#include "libcef/webwidget_host.h"
#include "libcef/browser_impl.h"
#include "libcef/cef_thread.h"
#include "base/bind.h"
#include "base/logging.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositionUnderline.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPopupMenu.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebScreenInfo.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/win/WebInputEventFactory.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/win/WebScreenInfoFactory.h"
#include "third_party/skia/include/core/SkRegion.h"
#include "ui/base/ime/composition_text.h"
#include "ui/base/range/range.h"
#include "ui/base/win/hwnd_util.h"
#include "ui/gfx/gdi_util.h"
#include "ui/gfx/rect.h"
#define GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
#define GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))
using webkit::npapi::WebPluginGeometry;
using WebKit::WebInputEvent;
using WebKit::WebInputEventFactory;
using WebKit::WebKeyboardEvent;
using WebKit::WebMouseEvent;
using WebKit::WebMouseWheelEvent;
using WebKit::WebPopupMenu;
using WebKit::WebScreenInfo;
using WebKit::WebScreenInfoFactory;
using WebKit::WebSize;
using WebKit::WebWidget;
using WebKit::WebWidgetClient;
static const wchar_t kWindowClassName[] = L"WebWidgetHost";
namespace {
struct MessageInfo {
UINT message;
WPARAM wParam;
LPARAM lParam;
};
BOOL CALLBACK SendMessageFunc(HWND hwnd, LPARAM lParam) {
MessageInfo* info = reinterpret_cast<MessageInfo*>(lParam);
SendMessage(hwnd, info->message, info->wParam, info->lParam);
return TRUE;
}
// Plugins are hosted in a Chromium-created parent window so it's necessary to
// send messages directly to the child window.
void SendMessageToPlugin(HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam) {
MessageInfo info = {message, wParam, lParam};
EnumChildWindows(hwnd, SendMessageFunc, reinterpret_cast<LPARAM>(&info));
}
inline SkIRect convertToSkiaRect(const gfx::Rect& r) {
return SkIRect::MakeLTRB(r.x(), r.y(), r.right(), r.bottom());
}
} // namespace
/*static*/
WebWidgetHost* WebWidgetHost::Create(HWND parent_view,
WebWidgetClient* client,
PaintDelegate* paint_delegate) {
WebWidgetHost* host = new WebWidgetHost();
if (!paint_delegate) {
// Create a window for the host.
static bool registered_class = false;
if (!registered_class) {
WNDCLASSEX wcex = {0};
wcex.cbSize = sizeof(wcex);
wcex.style = CS_DBLCLKS;
wcex.lpfnWndProc = WebWidgetHost::WndProc;
wcex.hInstance = GetModuleHandle(NULL);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.lpszClassName = kWindowClassName;
RegisterClassEx(&wcex);
registered_class = true;
}
host->view_ = CreateWindowEx(WS_EX_TOOLWINDOW,
kWindowClassName, kWindowClassName, WS_POPUP,
0, 0, 0, 0,
parent_view, NULL, GetModuleHandle(NULL),
NULL);
ui::SetWindowUserData(host->view_, host);
} else {
host->paint_delegate_ = paint_delegate;
}
host->webwidget_ = WebPopupMenu::create(client);
return host;
}
/*static*/
static WebWidgetHost* FromWindow(HWND view) {
return reinterpret_cast<WebWidgetHost*>(ui::GetWindowUserData(view));
}
/*static*/
LRESULT CALLBACK WebWidgetHost::WndProc(HWND hwnd, UINT message, WPARAM wparam,
LPARAM lparam) {
WebWidgetHost* host = FromWindow(hwnd);
if (host && !host->WndProc(message, wparam, lparam)) {
switch (message) {
case WM_PAINT: {
// Paint to the window.
host->Paint();
return 0;
}
case WM_ERASEBKGND:
// Do nothing here to avoid flashing, the background will be erased
// during painting.
return 0;
case WM_SIZE:
host->Resize(lparam);
return 0;
case WM_MOUSEMOVE:
case WM_MOUSELEAVE:
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
case WM_LBUTTONDBLCLK:
case WM_MBUTTONDBLCLK:
case WM_RBUTTONDBLCLK:
host->MouseEvent(message, wparam, lparam);
// Finish the ongoing composition whenever a mouse click happens.
// It matches IE's behavior.
if (message == WM_LBUTTONDOWN || message == WM_MBUTTONDOWN ||
message == WM_RBUTTONDOWN) {
host->ime_input_.CleanupComposition(host->view_);
}
break;
case WM_MOUSEWHEEL:
{
// Only send mouse wheel events if the cursor is over the window.
POINT mousePt = { GET_X_LPARAM(lparam), GET_Y_LPARAM(lparam) };
RECT wndRect;
GetWindowRect(hwnd, &wndRect);
if (PtInRect(&wndRect, mousePt))
host->WheelEvent(wparam, lparam);
}
break;
case WM_MOUSEACTIVATE:
if (host->popup()) {
// Do not activate popup widgets on mouse click.
return MA_NOACTIVATE;
}
break;
case WM_CAPTURECHANGED:
case WM_CANCELMODE:
host->CaptureLostEvent();
break;
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
case WM_CHAR:
case WM_SYSCHAR:
host->KeyEvent(message, wparam, lparam);
break;
// Necessary for text input of characters from east-asian languages. Do
// not pass to DefWindowProc or characters will be displayed twice.
case WM_IME_CHAR:
host->KeyEvent(message, wparam, lparam);
return 0;
case WM_CREATE:
// Call the WM_INPUTLANGCHANGE message handler to initialize
// the input locale of a browser process.
host->OnInputLangChange(0, 0);
break;
case WM_INPUTLANGCHANGE:
host->OnInputLangChange(0, 0);
break;
case WM_IME_SETCONTEXT:
{
BOOL handled;
LRESULT ime_retval = host->OnImeSetContext(message, wparam,
lparam, handled);
if (handled)
return ime_retval;
}
break;
case WM_IME_STARTCOMPOSITION:
{
BOOL handled;
LRESULT ime_retval = host->OnImeStartComposition(message, wparam,
lparam, handled);
if (handled)
return ime_retval;
}
break;
case WM_IME_COMPOSITION:
{
BOOL handled;
LRESULT ime_retval = host->OnImeComposition(message, wparam,
lparam, handled);
if (handled)
return ime_retval;
}
break;
case WM_IME_ENDCOMPOSITION:
{
BOOL handled;
LRESULT ime_retval = host->OnImeEndComposition(message, wparam,
lparam, handled);
if (handled)
return ime_retval;
}
break;
case WM_SETFOCUS:
host->SetFocus(true);
break;
case WM_KILLFOCUS:
host->SetFocus(false);
break;
case WM_NOTIFY:
host->OnNotify(0, reinterpret_cast<NMHDR*>(lparam));
break;
case WM_GETDLGCODE:
return DLGC_WANTALLKEYS;
}
}
return DefWindowProc(hwnd, message, wparam, lparam);
}
void WebWidgetHost::DidInvalidateRect(const gfx::Rect& damaged_rect) {
DLOG_IF(WARNING, painting_) << "unexpected invalidation while painting";
// If this invalidate overlaps with a pending scroll then we have to downgrade
// to invalidating the scroll rect.
UpdatePaintRect(damaged_rect);
InvalidateRect(damaged_rect);
if (!popup_ && view_ && webwidget_ && input_method_is_active_ &&
!has_update_input_method_task_) {
has_update_input_method_task_ = true;
// Call UpdateInputMethod() approximately every 100ms.
CefThread::PostDelayedTask(CefThread::UI, FROM_HERE,
base::Bind(&WebWidgetHost::UpdateInputMethod,
weak_factory_.GetWeakPtr()),
100);
}
}
void WebWidgetHost::DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect) {
DCHECK(dx || dy);
// Invalidate and re-paint the entire scroll rect if:
// 1. Window rendering is disabled, or
// 2. We're in a state where we cannot draw into the view right now, or
// 3. The rect is being scrolled by more than the size of the view, or
// 4. The scroll rect intersects the current paint region.
if (!view_ || !canvas_.get() || layouting_ || painting_ ||
abs(dx) >= clip_rect.width() || abs(dy) >= clip_rect.height() ||
paint_rgn_.intersects(convertToSkiaRect(clip_rect))) {
DidInvalidateRect(clip_rect);
return;
}
// Scroll the canvas bitmap.
{
skia::ScopedPlatformPaint scoped_platform_paint(canvas_.get());
HDC hdc = scoped_platform_paint.GetPlatformSurface();
RECT clip_rect_win32 = clip_rect.ToRECT(), uncovered_rect = {0, 0, 0, 0};
ScrollDC(hdc, dx, dy, NULL, &clip_rect_win32, NULL, &uncovered_rect);
UpdatePaintRect(gfx::Rect(uncovered_rect));
}
// Invalidate the scroll rect. It will be drawn from the canvas bitmap on the
// next WM_PAINT call.
InvalidateRect(clip_rect);
}
void WebWidgetHost::Invalidate() {
if (!webwidget_)
return;
WebSize size = webwidget_->size();
InvalidateRect(gfx::Rect(0, 0, size.width, size.height));
}
void WebWidgetHost::SetCursor(HCURSOR cursor) {
DCHECK(view_);
SetClassLong(view_, GCL_HCURSOR,
static_cast<LONG>(reinterpret_cast<LONG_PTR>(cursor)));
::SetCursor(cursor);
}
WebWidgetHost::WebWidgetHost()
: view_(NULL),
paint_delegate_(NULL),
webwidget_(NULL),
canvas_w_(0),
canvas_h_(0),
popup_(false),
track_mouse_leave_(false),
has_update_task_(false),
has_invalidate_task_(false),
has_update_input_method_task_(false),
tooltip_view_(NULL),
tooltip_showing_(false),
ime_notification_(false),
input_method_is_active_(false),
layouting_(false),
text_input_type_(WebKit::WebTextInputTypeNone),
ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
set_painting(false);
}
WebWidgetHost::~WebWidgetHost() {
if (view_)
ui::SetWindowUserData(view_, 0);
TrackMouseLeave(false);
ResetTooltip();
}
bool WebWidgetHost::WndProc(UINT message, WPARAM wparam, LPARAM lparam) {
switch (message) {
case WM_ACTIVATE:
if (wparam == WA_INACTIVE) {
PostMessage(view_, WM_CLOSE, 0, 0);
return true;
}
break;
}
return false;
}
void WebWidgetHost::Paint() {
int width, height;
GetSize(width, height);
gfx::Rect client_rect(width, height);
// Damaged rectangle used for drawing when window rendering is disabled.
SkRegion damaged_rgn;
if (!view_ && !redraw_rect_.IsEmpty()) {
// At a minimum we need to send the delegate the rectangle that was
// requested by calling CefBrowser::InvalidateRect().
damaged_rgn.setRect(convertToSkiaRect(redraw_rect_));
redraw_rect_ = gfx::Rect();
}
if (view_ && !webwidget_->isAcceleratedCompositingActive()) {
// Number of pixels that the canvas is allowed to differ from the client
// area.
const int kCanvasGrowSize = 128;
if (!canvas_.get() ||
canvas_w_ < client_rect.width() ||
canvas_h_ < client_rect.height() ||
canvas_w_ > client_rect.width() + kCanvasGrowSize * 2 ||
canvas_h_ > client_rect.height() + kCanvasGrowSize * 2) {
paint_rgn_.setRect(convertToSkiaRect(client_rect));
// Resize the canvas to be within a reasonable size of the client area.
canvas_w_ = client_rect.width() + kCanvasGrowSize;
canvas_h_ = client_rect.height() + kCanvasGrowSize;
canvas_.reset(new skia::PlatformCanvas(canvas_w_, canvas_h_, true));
}
} else if (!canvas_.get() || canvas_w_ != client_rect.width() ||
canvas_h_ != client_rect.height()) {
paint_rgn_.setRect(convertToSkiaRect(client_rect));
// The canvas must be the exact size of the client area.
canvas_w_ = client_rect.width();
canvas_h_ = client_rect.height();
canvas_.reset(new skia::PlatformCanvas(canvas_w_, canvas_h_, true));
}
webwidget_->animate(0.0);
// This may result in more invalidation.
layouting_ = true;
webwidget_->layout();
layouting_ = false;
// Paint the canvas if necessary. Allow painting to generate extra rects the
// first time we call it. This is necessary because some WebCore rendering
// objects update their layout only when painted.
for (int i = 0; i < 2; ++i) {
SkRegion draw_rgn;
draw_rgn.swap(paint_rgn_);
// Draw each dirty rect in the region.
SkRegion::Cliperator iterator(draw_rgn, convertToSkiaRect(client_rect));
for (; !iterator.done(); iterator.next()) {
const SkIRect& r = iterator.rect();
gfx::Rect paint_rect =
gfx::Rect(r.left(), r.top(), r.width(), r.height());
PaintRect(paint_rect);
if (!view_)
damaged_rgn.op(convertToSkiaRect(paint_rect), SkRegion::kUnion_Op);
}
if (paint_rgn_.isEmpty())
break;
}
DCHECK(paint_rgn_.isEmpty());
if (!view_ && plugin_map_.size() > 0) {
typedef std::list<const WebPluginGeometry*> PluginList;
PluginList visible_plugins;
// Identify the visible plugins.
PluginMap::const_iterator it = plugin_map_.begin();
for (; it != plugin_map_.end(); ++it) {
if (it->second.visible && client_rect.Intersects(it->second.window_rect))
visible_plugins.push_back(&it->second);
}
if (!visible_plugins.empty()) {
skia::ScopedPlatformPaint scoped_platform_paint(canvas_.get());
HDC drawDC = scoped_platform_paint.GetPlatformSurface();
HRGN oldRGN, newRGN;
POINT oldViewport;
// Paint the plugin windows.
PluginList::const_iterator it = visible_plugins.begin();
for (; it != visible_plugins.end(); ++it) {
const WebPluginGeometry* geom = *(it);
oldRGN = CreateRectRgn(0, 0, 1, 1);
GetClipRgn(drawDC, oldRGN);
// Only paint inside the clip region.
newRGN = CreateRectRgn(geom->clip_rect.x(),
geom->clip_rect.y(),
geom->clip_rect.right(),
geom->clip_rect.bottom());
gfx::SubtractRectanglesFromRegion(newRGN, geom->cutout_rects);
OffsetRgn(newRGN, geom->window_rect.x(), geom->window_rect.y());
SelectClipRgn(drawDC, newRGN);
// Change the viewport origin to the plugin window origin.
SetViewportOrgEx(drawDC, geom->window_rect.x(), geom->window_rect.y(),
&oldViewport);
SendMessageToPlugin(geom->window, WM_PRINT,
reinterpret_cast<WPARAM>(drawDC),
PRF_OWNED | PRF_ERASEBKGND | PRF_CLIENT | PRF_NONCLIENT);
SetViewportOrgEx(drawDC, oldViewport.x, oldViewport.y, NULL);
SelectClipRgn(drawDC, oldRGN);
if (!view_) {
damaged_rgn.op(convertToSkiaRect(geom->window_rect),
SkRegion::kUnion_Op);
}
DeleteObject(oldRGN);
DeleteObject(newRGN);
}
}
}
if (view_) {
// Paint to the window.
PAINTSTRUCT ps;
BeginPaint(view_, &ps);
skia::DrawToNativeContext(canvas_.get(), ps.hdc, ps.rcPaint.left,
ps.rcPaint.top, &ps.rcPaint);
EndPaint(view_, &ps);
// Draw children
UpdateWindow(view_);
} else {
// Paint to the delegate.
DCHECK(paint_delegate_);
const SkBitmap& bitmap = canvas_->getDevice()->accessBitmap(false);
DCHECK(bitmap.config() == SkBitmap::kARGB_8888_Config);
const void* pixels = bitmap.getPixels();
std::vector<CefRect> damaged_rects;
SkRegion::Cliperator iterator(damaged_rgn, convertToSkiaRect(client_rect));
for (; !iterator.done(); iterator.next()) {
const SkIRect& r = iterator.rect();
damaged_rects.push_back(
CefRect(r.left(), r.top(), r.width(), r.height()));
}
paint_delegate_->Paint(popup_, damaged_rects, pixels);
}
// Used with scheduled invalidation to maintain a consistent frame rate.
paint_last_call_ = base::TimeTicks::Now();
if (has_invalidate_task_)
has_invalidate_task_ = false;
}
void WebWidgetHost::InvalidateRect(const gfx::Rect& rect) {
if (rect.IsEmpty())
return;
if (view_) {
// Let the window handle painting.
RECT r = rect.ToRECT();
::InvalidateRect(view_, &r, FALSE);
} else {
// Don't post a paint task if this invalidation occurred during layout or if
// a paint task is already pending. Paint() will be called by DoPaint().
if (!layouting_ && !has_update_task_) {
has_update_task_ = true;
CefThread::PostTask(CefThread::UI, FROM_HERE,
base::Bind(&WebWidgetHost::DoPaint, weak_factory_.GetWeakPtr()));
}
}
}
bool WebWidgetHost::GetImage(int width, int height, void* buffer) {
const SkBitmap& bitmap = canvas_->getDevice()->accessBitmap(false);
DCHECK(bitmap.config() == SkBitmap::kARGB_8888_Config);
if (width == canvas_->getDevice()->width() &&
height == canvas_->getDevice()->height()) {
// The specified width and height values are the same as the canvas size.
// Return the existing canvas contents.
const void* pixels = bitmap.getPixels();
memcpy(buffer, pixels, width * height * 4);
return true;
}
// Create a new canvas of the requested size.
scoped_ptr<skia::PlatformCanvas> new_canvas(
new skia::PlatformCanvas(width, height, true));
new_canvas->writePixels(bitmap, 0, 0);
const SkBitmap& new_bitmap = new_canvas->getDevice()->accessBitmap(false);
DCHECK(new_bitmap.config() == SkBitmap::kARGB_8888_Config);
// Return the new canvas contents.
const void* pixels = new_bitmap.getPixels();
memcpy(buffer, pixels, width * height * 4);
return true;
}
WebScreenInfo WebWidgetHost::GetScreenInfo() {
return WebScreenInfoFactory::screenInfo(view_);
}
void WebWidgetHost::Resize(LPARAM lparam) {
SetSize(LOWORD(lparam), HIWORD(lparam));
}
void WebWidgetHost::MouseEvent(UINT message, WPARAM wparam, LPARAM lparam) {
const WebMouseEvent& event = WebInputEventFactory::mouseEvent(
view_, message, wparam, lparam);
switch (event.type) {
case WebInputEvent::MouseMove:
TrackMouseLeave(true);
break;
case WebInputEvent::MouseLeave:
TrackMouseLeave(false);
break;
case WebInputEvent::MouseDown:
if (!popup()) {
SetCapture(view_);
if (::GetFocus() != view_) {
// Set focus to this window.
HWND parent_hwnd = ::GetParent(view_);
if (parent_hwnd) {
CefRefPtr<CefBrowserImpl> browser =
static_cast<CefBrowserImpl*>(
ui::GetWindowUserData(parent_hwnd));
if (browser.get()) {
// This mimics a temporary workaround in RenderWidgetHostViewWin
// for bug 765011 to get focus when the mouse is clicked. This
// happens after the mouse down event is sent to the renderer
// because normally Windows does a WM_SETFOCUS after
// WM_LBUTTONDOWN.
browser->SetFocus(true);
}
}
}
}
break;
case WebInputEvent::MouseUp:
if (!popup()) {
if (GetCapture() == view_)
ReleaseCapture();
}
break;
}
webwidget_->handleInputEvent(event);
}
void WebWidgetHost::WheelEvent(WPARAM wparam, LPARAM lparam) {
const WebMouseWheelEvent& event = WebInputEventFactory::mouseWheelEvent(
view_, WM_MOUSEWHEEL, wparam, lparam);
webwidget_->handleInputEvent(event);
}
void WebWidgetHost::KeyEvent(UINT message, WPARAM wparam, LPARAM lparam) {
const WebKeyboardEvent& event = WebInputEventFactory::keyboardEvent(
view_, message, wparam, lparam);
last_key_event_ = event;
webwidget_->handleInputEvent(event);
}
void WebWidgetHost::CaptureLostEvent() {
webwidget_->mouseCaptureLost();
}
void WebWidgetHost::SetFocus(bool enable) {
webwidget_->setFocus(enable);
}
void WebWidgetHost::OnNotify(WPARAM wparam, NMHDR* header) {
if (tooltip_view_ == NULL)
return;
switch (header->code) {
case TTN_GETDISPINFO:
{
NMTTDISPINFOW* tooltip_info = reinterpret_cast<NMTTDISPINFOW*>(header);
tooltip_info->szText[0] = L'\0';
tooltip_info->lpszText = const_cast<wchar_t*>(tooltip_text_.c_str());
::SendMessage(tooltip_view_, TTM_SETMAXTIPWIDTH, 0, 1024);
}
break;
case TTN_POP:
tooltip_showing_ = false;
break;
case TTN_SHOW:
tooltip_showing_ = true;
break;
}
}
void WebWidgetHost::SetTooltipText(const CefString& tooltip_text) {
if (!view_)
return;
std::wstring new_tooltip_text(tooltip_text);
if (new_tooltip_text != tooltip_text_) {
tooltip_text_ = new_tooltip_text;
// Need to check if the tooltip is already showing so that we don't
// immediately show the tooltip with no delay when we move the mouse from
// a region with no tooltip to a region with a tooltip.
if (::IsWindow(tooltip_view_) && tooltip_showing_) {
::SendMessage(tooltip_view_, TTM_POP, 0, 0);
::SendMessage(tooltip_view_, TTM_POPUP, 0, 0);
}
} else {
// Make sure the tooltip gets closed after TTN_POP gets sent. For some
// reason this doesn't happen automatically, so moving the mouse around
// within the same link/image/etc doesn't cause the tooltip to re-appear.
if (!tooltip_showing_) {
if (::IsWindow(tooltip_view_))
::SendMessage(tooltip_view_, TTM_POP, 0, 0);
}
}
}
void WebWidgetHost::EnsureTooltip() {
if (!view_)
return;
UINT message = TTM_NEWTOOLRECT;
TOOLINFO ti;
ti.cbSize = sizeof(ti);
ti.hwnd = view_;
ti.uId = 0;
if (!::IsWindow(tooltip_view_)) {
message = TTM_ADDTOOL;
tooltip_view_ = CreateWindowEx(
WS_EX_TRANSPARENT,
TOOLTIPS_CLASS, L"tooltip_view_", TTS_NOPREFIX, 0, 0, 0, 0,
view_, NULL,
NULL, NULL);
ti.uFlags = TTF_SUBCLASS;
ti.lpszText = LPSTR_TEXTCALLBACK;
}
GetClientRect(view_, &ti.rect);
SendMessage(tooltip_view_, message, NULL, reinterpret_cast<LPARAM>(&ti));
}
void WebWidgetHost::ResetTooltip() {
if (!view_)
return;
if (::IsWindow(tooltip_view_))
::DestroyWindow(tooltip_view_);
tooltip_view_ = NULL;
}
void WebWidgetHost::TrackMouseLeave(bool track) {
if (!view_)
return;
if (track == track_mouse_leave_)
return;
track_mouse_leave_ = track;
DCHECK(view_);
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE;
if (!track_mouse_leave_)
tme.dwFlags |= TME_CANCEL;
tme.hwndTrack = view_;
TrackMouseEvent(&tme);
}
void WebWidgetHost::PaintRect(const gfx::Rect& rect) {
#ifndef NDEBUG
DCHECK(!painting_);
#endif
DCHECK(canvas_.get());
if (!popup() && ((WebKit::WebView*)webwidget_)->isTransparent()) {
// When using transparency mode clear the rectangle before painting.
SkPaint clearpaint;
clearpaint.setARGB(0, 0, 0, 0);
clearpaint.setXfermodeMode(SkXfermode::kClear_Mode);
SkRect skrc;
skrc.set(rect.x(), rect.y(), rect.right(), rect.bottom());
canvas_->drawRect(skrc, clearpaint);
}
set_painting(true);
webwidget_->paint(canvas_.get(), rect);
set_painting(false);
}
void WebWidgetHost::SendKeyEvent(cef_key_type_t type,
const cef_key_info_t& keyInfo,
int modifiers) {
UINT message = 0;
WPARAM wparam = keyInfo.key;
LPARAM lparam = modifiers;
if (type == KT_KEYUP) {
if (keyInfo.sysChar)
message = WM_SYSKEYUP;
else if (keyInfo.imeChar)
message = WM_IME_KEYUP;
else
message = WM_KEYUP;
} else if (type == KT_KEYDOWN) {
if (keyInfo.sysChar)
message = WM_SYSKEYDOWN;
else if (keyInfo.imeChar)
message = WM_IME_KEYDOWN;
else
message = WM_KEYDOWN;
} else if (type == KT_CHAR) {
if (keyInfo.sysChar)
message = WM_SYSCHAR;
else if (keyInfo.imeChar)
message = WM_IME_CHAR;
else
message = WM_CHAR;
}
if (message == 0) {
NOTREACHED();
return;
}
const WebKeyboardEvent& event = WebInputEventFactory::keyboardEvent(
NULL, message, wparam, lparam);
last_key_event_ = event;
webwidget_->handleInputEvent(event);
}
void WebWidgetHost::SendMouseClickEvent(int x, int y,
cef_mouse_button_type_t type,
bool mouseUp, int clickCount) {
DCHECK(clickCount >=1 && clickCount <= 2);
UINT message = 0;
WPARAM wparam = 0;
LPARAM lparam = MAKELPARAM(x, y);
if (type == MBT_LEFT) {
if (mouseUp)
message = (clickCount == 1?WM_LBUTTONUP:WM_LBUTTONDBLCLK);
else
message = WM_LBUTTONDOWN;
} else if (type == MBT_MIDDLE) {
if (mouseUp)
message = (clickCount == 1?WM_MBUTTONUP:WM_MBUTTONDBLCLK);
else
message = WM_MBUTTONDOWN;
} else if (type == MBT_RIGHT) {
if (mouseUp)
message = (clickCount == 1?WM_RBUTTONUP:WM_RBUTTONDBLCLK);
else
message = WM_RBUTTONDOWN;
}
if (message == 0) {
NOTREACHED();
return;
}
if (GetKeyState(VK_CONTROL) & 0x8000)
wparam |= MK_CONTROL;
if (GetKeyState(VK_SHIFT) & 0x8000)
wparam |= MK_SHIFT;
if (GetKeyState(VK_LBUTTON) & 0x8000)
wparam |= MK_LBUTTON;
if (GetKeyState(VK_MBUTTON) & 0x8000)
wparam |= MK_MBUTTON;
if (GetKeyState(VK_RBUTTON) & 0x8000)
wparam |= MK_RBUTTON;
gfx::PluginWindowHandle plugin = GetWindowedPluginAt(x, y);
if (plugin) {
SendMessageToPlugin(plugin, message, wparam, lparam);
} else {
const WebMouseEvent& event = WebInputEventFactory::mouseEvent(NULL, message,
wparam, lparam);
webwidget_->handleInputEvent(event);
}
}
void WebWidgetHost::SendMouseMoveEvent(int x, int y, bool mouseLeave) {
UINT message;
WPARAM wparam = 0;
LPARAM lparam = 0;
if (mouseLeave) {
message = WM_MOUSELEAVE;
} else {
message = WM_MOUSEMOVE;
lparam = MAKELPARAM(x, y);
}
if (GetKeyState(VK_CONTROL) & 0x8000)
wparam |= MK_CONTROL;
if (GetKeyState(VK_SHIFT) & 0x8000)
wparam |= MK_SHIFT;
if (GetKeyState(VK_LBUTTON) & 0x8000)
wparam |= MK_LBUTTON;
if (GetKeyState(VK_MBUTTON) & 0x8000)
wparam |= MK_MBUTTON;
if (GetKeyState(VK_RBUTTON) & 0x8000)
wparam |= MK_RBUTTON;
gfx::PluginWindowHandle plugin = GetWindowedPluginAt(x, y);
if (plugin) {
SendMessageToPlugin(plugin, message, wparam, lparam);
} else {
const WebMouseEvent& event = WebInputEventFactory::mouseEvent(NULL, message,
wparam, lparam);
webwidget_->handleInputEvent(event);
}
}
void WebWidgetHost::SendMouseWheelEvent(int x, int y, int deltaX, int deltaY) {
WPARAM wparam = MAKEWPARAM(0, deltaY);
LPARAM lparam = MAKELPARAM(x, y);
if (GetKeyState(VK_CONTROL) & 0x8000)
wparam |= MK_CONTROL;
if (GetKeyState(VK_SHIFT) & 0x8000)
wparam |= MK_SHIFT;
if (GetKeyState(VK_LBUTTON) & 0x8000)
wparam |= MK_LBUTTON;
if (GetKeyState(VK_MBUTTON) & 0x8000)
wparam |= MK_MBUTTON;
if (GetKeyState(VK_RBUTTON) & 0x8000)
wparam |= MK_RBUTTON;
gfx::PluginWindowHandle plugin = GetWindowedPluginAt(x, y);
if (plugin) {
SendMessageToPlugin(plugin, WM_MOUSEWHEEL, wparam, lparam);
} else {
const WebMouseWheelEvent& event = WebInputEventFactory::mouseWheelEvent(
NULL, WM_MOUSEWHEEL, wparam, lparam);
webwidget_->handleInputEvent(event);
}
}
void WebWidgetHost::SendFocusEvent(bool setFocus) {
SetFocus(setFocus);
}
void WebWidgetHost::SendCaptureLostEvent() {
CaptureLostEvent();
}
LRESULT WebWidgetHost::OnImeSetContext(UINT message, WPARAM wparam,
LPARAM lparam, BOOL& handled) {
if (!webwidget_)
return 0;
// We need status messages about the focused input control from a
// renderer process when:
// * the current input context has IMEs, and;
// * an application is activated.
// This seems to tell we should also check if the current input context has
// IMEs before sending a request, however, this WM_IME_SETCONTEXT is
// fortunately sent to an application only while the input context has IMEs.
// Therefore, we just start/stop status messages according to the activation
// status of this application without checks.
bool activated = (wparam == TRUE);
if (webwidget_) {
input_method_is_active_ = activated;
ime_notification_ = activated;
}
if (ime_notification_)
ime_input_.CreateImeWindow(view_);
ime_input_.CleanupComposition(view_);
ime_input_.SetImeWindowStyle(view_, message, wparam, lparam, &handled);
return 0;
}
LRESULT WebWidgetHost::OnImeStartComposition(UINT message, WPARAM wparam,
LPARAM lparam, BOOL& handled) {
if (!webwidget_)
return 0;
// Reset the composition status and create IME windows.
ime_input_.CreateImeWindow(view_);
ime_input_.ResetComposition(view_);
// We have to prevent WTL from calling ::DefWindowProc() because the function
// calls ::ImmSetCompositionWindow() and ::ImmSetCandidateWindow() to
// over-write the position of IME windows.
handled = TRUE;
return 0;
}
LRESULT WebWidgetHost::OnImeComposition(UINT message, WPARAM wparam,
LPARAM lparam, BOOL& handled) {
if (!webwidget_)
return 0;
// At first, update the position of the IME window.
ime_input_.UpdateImeWindow(view_);
// ui::CompositionUnderline should be identical to
// WebKit::WebCompositionUnderline, so that we can do reinterpret_cast safely.
COMPILE_ASSERT(sizeof(ui::CompositionUnderline) ==
sizeof(WebKit::WebCompositionUnderline),
ui_CompositionUnderline__WebKit_WebCompositionUnderline_diff);
// Retrieve the result string and its attributes of the ongoing composition
// and send it to a renderer process.
ui::CompositionText composition;
if (ime_input_.GetResult(view_, lparam, &composition.text)) {
webwidget_->setComposition(composition.text,
std::vector<WebKit::WebCompositionUnderline>(),
0, 0);
webwidget_->confirmComposition();
ime_input_.ResetComposition(view_);
// Fall though and try reading the composition string.
// Japanese IMEs send a message containing both GCS_RESULTSTR and
// GCS_COMPSTR, which means an ongoing composition has been finished
// by the start of another composition.
}
// Retrieve the composition string and its attributes of the ongoing
// composition and send it to a renderer process.
if (ime_input_.GetComposition(view_, lparam, &composition)) {
// TODO(suzhe): due to a bug of webkit, we can't use selection range with
// composition string. See: https://bugs.webkit.org/show_bug.cgi?id=37788
composition.selection = ui::Range(composition.selection.end());
// TODO(suzhe): convert both renderer_host and renderer to use
// ui::CompositionText.
const std::vector<WebKit::WebCompositionUnderline>& underlines =
reinterpret_cast<const std::vector<WebKit::WebCompositionUnderline>&>(
composition.underlines);
webwidget_->setComposition(
composition.text, underlines,
composition.selection.start(), composition.selection.end());
}
// We have to prevent WTL from calling ::DefWindowProc() because we do not
// want for the IMM (Input Method Manager) to send WM_IME_CHAR messages.
handled = TRUE;
return 0;
}
LRESULT WebWidgetHost::OnImeEndComposition(UINT message, WPARAM wparam,
LPARAM lparam, BOOL& handled) {
if (!webwidget_)
return 0;
if (ime_input_.is_composing()) {
// A composition has been ended while there is an ongoing composition,
// i.e. the ongoing composition has been canceled.
// We need to reset the composition status both of the ImeInput object and
// of the renderer process.
ime_input_.CancelIME(view_);
ime_input_.ResetComposition(view_);
}
ime_input_.DestroyImeWindow(view_);
// Let WTL call ::DefWindowProc() and release its resources.
handled = FALSE;
return 0;
}
void WebWidgetHost::OnInputLangChange(DWORD character_set,
HKL input_language_id) {
// Send the given Locale ID to the ImeInput object and retrieves whether
// or not the current input context has IMEs.
// If the current input context has IMEs, a browser process has to send a
// request to a renderer process that it needs status messages about
// the focused edit control from the renderer process.
// On the other hand, if the current input context does not have IMEs, the
// browser process also has to send a request to the renderer process that
// it does not need the status messages any longer.
// To minimize the number of this notification request, we should check if
// the browser process is actually retrieving the status messages (this
// state is stored in ime_notification_) and send a request only if the
// browser process has to update this status, its details are listed below:
// * If a browser process is not retrieving the status messages,
// (i.e. ime_notification_ == false),
// send this request only if the input context does have IMEs,
// (i.e. ime_status == true);
// When it successfully sends the request, toggle its notification status,
// (i.e.ime_notification_ = !ime_notification_ = true).
// * If a browser process is retrieving the status messages
// (i.e. ime_notification_ == true),
// send this request only if the input context does not have IMEs,
// (i.e. ime_status == false).
// When it successfully sends the request, toggle its notification status,
// (i.e.ime_notification_ = !ime_notification_ = false).
// To analyze the above actions, we can optimize them into the ones
// listed below:
// 1 Sending a request only if ime_status_ != ime_notification_, and;
// 2 Copying ime_status to ime_notification_ if it sends the request
// successfully (because Action 1 shows ime_status = !ime_notification_.)
bool ime_status = ime_input_.SetInputLanguage();
if (ime_status != ime_notification_ && webwidget_) {
input_method_is_active_ = ime_status;
ime_notification_ = ime_status;
}
}
void WebWidgetHost::ImeUpdateTextInputState(WebKit::WebTextInputType type,
const gfx::Rect& caret_rect) {
if (text_input_type_ != type) {
text_input_type_ = type;
if (type == WebKit::WebTextInputTypeText)
ime_input_.EnableIME(view_);
else
ime_input_.DisableIME(view_);
}
// Only update caret position if the input method is enabled.
if (type == WebKit::WebTextInputTypeText)
ime_input_.UpdateCaretRect(view_, caret_rect);
}
void WebWidgetHost::UpdateInputMethod() {
REQUIRE_UIT();
has_update_input_method_task_ = false;
if (!input_method_is_active_ || !webwidget_)
return;
WebKit::WebTextInputType new_type = webwidget_->textInputType();
WebKit::WebRect new_caret_bounds;
WebKit::WebRect startRect, endRect;
if (webwidget_->selectionBounds(startRect, endRect))
new_caret_bounds = endRect;
// Only sends text input type and caret bounds to the browser process if they
// are changed.
if (text_input_type_ != new_type || caret_bounds_ != new_caret_bounds) {
text_input_type_ = new_type;
caret_bounds_ = new_caret_bounds;
ImeUpdateTextInputState(new_type, new_caret_bounds);
}
}
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