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cef/cef1/libcef/browser_impl_win.cc

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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 "libcef/browser_impl.h"
#include <dwmapi.h>
#include <shellapi.h>
#include <shlwapi.h>
#include <wininet.h>
#include <winspool.h>
#include "libcef/cef_context.h"
#include "libcef/browser_settings.h"
#include "base/win/windows_version.h"
#include "printing/units.h"
#include "skia/ext/vector_canvas.h"
#include "skia/ext/vector_platform_device_emf_win.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPrintParams.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/base/win/hwnd_util.h"
#include "webkit/glue/webpreferences.h"
#pragma comment(lib, "dwmapi.lib")
using WebKit::WebRect;
using WebKit::WebSize;
namespace {
bool IsAeroGlassEnabled() {
if (base::win::GetVersion() < base::win::VERSION_VISTA)
return false;
BOOL enabled = FALSE;
return SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled;
}
void SetAeroGlass(HWND hWnd) {
if (!IsAeroGlassEnabled())
return;
// Make the whole window transparent.
MARGINS mgMarInset = { -1, -1, -1, -1 };
DwmExtendFrameIntoClientArea(hWnd, &mgMarInset);
}
} // namespace
LPCTSTR CefBrowserImpl::GetWndClass() {
return L"CefBrowserWindow";
}
LRESULT CALLBACK CefBrowserImpl::WndProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam) {
CefBrowserImpl* browser =
static_cast<CefBrowserImpl*>(ui::GetWindowUserData(hwnd));
switch (message) {
case WM_CLOSE:
if (browser) {
bool handled(false);
if (browser->client_.get()) {
CefRefPtr<CefLifeSpanHandler> handler =
browser->client_->GetLifeSpanHandler();
if (handler.get()) {
// Give the client a chance to handle this one.
handled = handler->DoClose(browser);
}
}
if (handled)
return 0;
// We are our own parent in this case.
browser->ParentWindowWillClose();
}
break;
case WM_DESTROY:
if (browser) {
// Clear the user data pointer.
ui::SetWindowUserData(hwnd, NULL);
BrowserWebViewDelegate* delegate = browser->UIT_GetWebViewDelegate();
if (delegate && delegate->drag_delegate()) {
// Don't destroy the browser while a drag operation is pending. Instead,
// destroy the browser once the drag operation completes.
delegate->set_destroy_on_drag_end(true);
} else {
// Destroy the browser.
browser->UIT_DestroyBrowser();
}
}
return 0;
case WM_SIZE:
if (browser && browser->UIT_GetWebView()) {
// resize the web view window to the full size of the browser window
RECT rc;
GetClientRect(hwnd, &rc);
MoveWindow(browser->UIT_GetWebViewWndHandle(), 0, 0, rc.right, rc.bottom,
TRUE);
}
return 0;
case WM_SETFOCUS:
if (browser)
browser->SetFocus(true);
return 0;
case WM_ERASEBKGND:
return 0;
case WM_DWMCOMPOSITIONCHANGED:
// Message sent to top-level windows when composition has been enabled or
// disabled.
if (browser->window_info_.m_bTransparentPainting)
SetAeroGlass(hwnd);
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
void CefBrowserImpl::ParentWindowWillClose() {
// We must re-enable the opener (owner of the modal window) before we close
// the popup to avoid focus/activation/z-order issues.
if (opener_ && opener_was_disabled_by_modal_loop_) {
HWND owner = ::GetAncestor(opener_, GA_ROOT);
::EnableWindow(owner, TRUE);
}
}
CefWindowHandle CefBrowserImpl::GetWindowHandle() {
AutoLock lock_scope(this);
return window_info_.m_hWnd;
}
bool CefBrowserImpl::IsWindowRenderingDisabled() {
return (window_info_.m_bWindowRenderingDisabled ? true : false);
}
gfx::NativeWindow CefBrowserImpl::UIT_GetMainWndHandle() {
REQUIRE_UIT();
return window_info_.m_bWindowRenderingDisabled ?
window_info_.m_hWndParent : window_info_.m_hWnd;
}
void CefBrowserImpl::UIT_ClearMainWndHandle() {
REQUIRE_UIT();
if (!window_info_.m_bWindowRenderingDisabled)
window_info_.m_hWnd = NULL;
}
bool CefBrowserImpl::UIT_CreateBrowser(const CefString& url) {
REQUIRE_UIT();
Lock();
if (!window_info_.m_bWindowRenderingDisabled) {
std::wstring windowName(CefString(&window_info_.m_windowName));
// Create the new browser window
window_info_.m_hWnd = CreateWindowEx(window_info_.m_dwExStyle,
GetWndClass(), windowName.c_str(), window_info_.m_dwStyle,
window_info_.m_x, window_info_.m_y, window_info_.m_nWidth,
window_info_.m_nHeight, window_info_.m_hWndParent, window_info_.m_hMenu,
::GetModuleHandle(NULL), NULL);
// It's possible for CreateWindowEx to fail if the parent window was
// destroyed between the call to CreateBrowser and the above one.
DCHECK(window_info_.m_hWnd != NULL);
if (!window_info_.m_hWnd) {
Unlock();
return false;
}
if (window_info_.m_bTransparentPainting &&
!(window_info_.m_dwStyle & WS_CHILD)) {
// Transparent top-level windows will be given "sheet of glass" effect.
SetAeroGlass(window_info_.m_hWnd);
}
// Set window user data to this object for future reference from the window
// procedure
ui::SetWindowUserData(window_info_.m_hWnd, this);
} else {
// Create a new paint delegate.
paint_delegate_.reset(new PaintDelegate(this));
}
if (!settings_.developer_tools_disabled)
dev_tools_agent_.reset(new BrowserDevToolsAgent());
// Add a reference that will be released in UIT_DestroyBrowser().
AddRef();
// Add the new browser to the list maintained by the context
_Context->AddBrowser(this);
webkit_glue::WebPreferences prefs;
BrowserToWebSettings(settings_, prefs);
// Create the webview host object
webviewhost_.reset(
WebViewHost::Create(window_info_.m_hWnd, gfx::Rect(), delegate_.get(),
paint_delegate_.get(), dev_tools_agent_.get(),
prefs));
if (window_info_.m_bTransparentPainting)
webviewhost_->webview()->setIsTransparent(true);
if (!settings_.developer_tools_disabled)
dev_tools_agent_->SetWebView(webviewhost_->webview());
Unlock();
if (!window_info_.m_bWindowRenderingDisabled) {
if (!settings_.drag_drop_disabled)
delegate_->RegisterDragDrop();
// Size the web view window to the browser window
RECT cr;
GetClientRect(window_info_.m_hWnd, &cr);
// Respect the WS_VISIBLE window style when setting the window's position
UINT flags = SWP_NOZORDER;
if (window_info_.m_dwStyle & WS_VISIBLE)
flags |= SWP_SHOWWINDOW;
else
flags |= SWP_NOACTIVATE;
SetWindowPos(UIT_GetWebViewWndHandle(), NULL, cr.left, cr.top, cr.right,
cr.bottom, flags);
}
if (client_.get()) {
CefRefPtr<CefLifeSpanHandler> handler = client_->GetLifeSpanHandler();
if (handler.get()) {
// Notify the handler that we're done creating the new window
handler->OnAfterCreated(this);
}
}
if (url.length() > 0)
UIT_LoadURL(GetMainFrame(), url);
return true;
}
void CefBrowserImpl::UIT_SetFocus(WebWidgetHost* host, bool enable) {
REQUIRE_UIT();
if (!host)
return;
if (enable)
::SetFocus(host->view_handle());
else if (::GetFocus() == host->view_handle())
::SetFocus(NULL);
}
static void WriteTextToFile(const std::string& data,
const std::wstring& file_path) {
FILE* fp;
errno_t err = _wfopen_s(&fp, file_path.c_str(), L"wt");
if (err)
return;
fwrite(data.c_str(), 1, data.size(), fp);
fclose(fp);
}
bool CefBrowserImpl::UIT_ViewDocumentString(WebKit::WebFrame *frame) {
REQUIRE_UIT();
DWORD dwRetVal;
DWORD dwBufSize = 512;
TCHAR lpPathBuffer[512];
UINT uRetVal;
TCHAR szTempName[512];
dwRetVal = GetTempPath(dwBufSize, // length of the buffer
lpPathBuffer); // buffer for path
if (dwRetVal > dwBufSize || (dwRetVal == 0))
return false;
// Create a temporary file.
uRetVal = GetTempFileName(lpPathBuffer, // directory for tmp files
TEXT("src"), // temp file name prefix
0, // create unique name
szTempName); // buffer for name
if (uRetVal == 0)
return false;
size_t len = wcslen(szTempName);
wcscpy(szTempName + len - 3, L"txt");
std::string markup = frame->contentAsMarkup().utf8();
WriteTextToFile(markup, szTempName);
int errorCode = reinterpret_cast<int>(ShellExecute(UIT_GetMainWndHandle(),
L"open", szTempName, NULL, NULL, SW_SHOWNORMAL));
if (errorCode <= 32)
return false;
return true;
}
void CefBrowserImpl::UIT_PrintPage(int page_number, int total_pages,
const gfx::Size& canvas_size,
WebKit::WebFrame* frame) {
REQUIRE_UIT();
printing::PrintParams params;
const printing::PrintSettings &settings = print_context_.settings();
settings.RenderParams(&params);
const int src_size_x = canvas_size.width();
const int src_size_y = canvas_size.height();
const int dest_size_x =
settings.page_setup_pixels().printable_area().width();
const int dest_size_y =
settings.page_setup_pixels().printable_area().height();
print_context_.NewPage();
HDC hDC = print_context_.context();
BOOL res;
// Save the state to make sure the context this function call does not modify
// the device context.
int saved_state = SaveDC(hDC);
DCHECK_NE(saved_state, 0);
SkDevice* device = skia::VectorPlatformDeviceEmf::CreateDevice(dest_size_x,
dest_size_y,
true, hDC);
DCHECK(device);
skia::VectorCanvas canvas(device);
// The hDC 0 coord is the left most printeable area and not physical area of
// the paper so subtract that out of our canvas translate.
const int left_margin_offset =
settings.page_setup_pixels().effective_margins().left -
settings.page_setup_pixels().printable_area().x();
const int top_margin_offset =
settings.page_setup_pixels().effective_margins().top -
settings.page_setup_pixels().printable_area().y();
// Adjust for the margin offset.
canvas.translate(static_cast<float>(left_margin_offset),
static_cast<float>(top_margin_offset));
// Apply the print scaling factor.
const float print_scale_x =
static_cast<float>(settings.page_setup_pixels().content_area().width())
/ src_size_x;
const float print_scale_y =
static_cast<float>(settings.page_setup_pixels().content_area().height())
/ src_size_y;
canvas.scale(print_scale_x, print_scale_y);
// Apply the WebKit scaling factor.
const float webkit_scale = frame->getPrintPageShrink(page_number);
if (webkit_scale <= 0) {
NOTREACHED() << "Printing page " << page_number << " failed.";
}
canvas.scale(webkit_scale, webkit_scale);
frame->printPage(page_number, &canvas);
res = RestoreDC(hDC, saved_state);
DCHECK_NE(res, 0);
CefRefPtr<CefPrintHandler> handler;
if (client_.get())
handler = client_->GetPrintHandler();
if (handler.get()) {
saved_state = SaveDC(hDC);
DCHECK_NE(saved_state, 0);
// Gather print header state information
RECT rect;
rect.left = left_margin_offset;
rect.top = settings.page_setup_pixels().effective_margins().header -
settings.page_setup_pixels().printable_area().y();
rect.right = left_margin_offset +
settings.page_setup_pixels().content_area().width();
rect.bottom = settings.page_setup_pixels().printable_area().height() -
(settings.page_setup_pixels().effective_margins().footer -
(settings.page_setup_pixels().physical_size().height() -
settings.page_setup_pixels().printable_area().bottom()));
const double scale = static_cast<double>(settings.dpi()) /
static_cast<double>(settings.desired_dpi);
CefPrintInfo printInfo;
printInfo.m_hDC = hDC;
printInfo.m_Rect = rect;
printInfo.m_Scale = scale;
CefString url(frame->document().url().spec());
CefString title = title_;
CefString topLeft, topCenter, topRight;
CefString bottomLeft, bottomCenter, bottomRight;
// Allow the handler to format print header and/or footer.
bool handled = handler->GetPrintHeaderFooter(this, UIT_GetCefFrame(frame),
printInfo, url, title, page_number+1, total_pages, topLeft, topCenter,
topRight, bottomLeft, bottomCenter, bottomRight);
if (!handled) {
// Draw handler-defined headers and/or footers.
LOGFONT lf;
memset(&lf, 0, sizeof(lf));
lf.lfHeight = static_cast<int>(ceil(10. * scale));
lf.lfPitchAndFamily = FF_SWISS;
HFONT hFont = CreateFontIndirect(&lf);
HFONT hOldFont = (HFONT)SelectObject(hDC, hFont);
COLORREF hOldColor = SetTextColor(hDC, RGB(0, 0, 0));
int hOldBkMode = SetBkMode(hDC, TRANSPARENT);
// TODO(cef): Keep the header strings inside a reasonable bounding box
// so that they don't overlap each other.
if (topLeft.length() > 0) {
std::wstring topLeftStr(topLeft);
DrawText(hDC, topLeftStr.c_str(), topLeftStr.length(), &rect,
DT_LEFT | DT_TOP | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
if (topCenter.length() > 0) {
std::wstring topCenterStr(topCenter);
DrawText(hDC, topCenterStr.c_str(), topCenterStr.length(), &rect,
DT_CENTER | DT_TOP | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
if (topRight.length() > 0) {
std::wstring topRightStr(topRight);
DrawText(hDC, topRightStr.c_str(), topRightStr.length(), &rect,
DT_RIGHT | DT_TOP | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
if (bottomLeft.length() > 0) {
std::wstring bottomLeftStr(bottomLeft);
DrawText(hDC, bottomLeftStr.c_str(), bottomLeftStr.length(), &rect,
DT_LEFT | DT_BOTTOM | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
if (bottomCenter.length() > 0) {
std::wstring bottomCenterStr(bottomCenter);
DrawText(hDC, bottomCenterStr.c_str(), bottomCenterStr.length(), &rect,
DT_CENTER | DT_BOTTOM | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
if (bottomRight.length() > 0) {
std::wstring bottomRightStr(bottomRight);
DrawText(hDC, bottomRightStr.c_str(), bottomRightStr.length(), &rect,
DT_RIGHT | DT_BOTTOM | DT_SINGLELINE | DT_END_ELLIPSIS
| DT_EXPANDTABS | DT_NOPREFIX);
}
SetTextColor(hDC, hOldColor);
SelectObject(hDC, hOldFont);
DeleteObject(hFont);
SetBkMode(hDC, hOldBkMode);
}
res = RestoreDC(hDC, saved_state);
DCHECK_NE(res, 0);
}
print_context_.PageDone();
}
void CefBrowserImpl::UIT_PrintPages(WebKit::WebFrame* frame) {
REQUIRE_UIT();
print_context_.Init();
{
// Make a copy of settings.
printing::PrintSettings settings = print_context_.settings();
CefPrintOptions print_options;
settings.UpdatePrintOptions(print_options);
CefRefPtr<CefPrintHandler> handler;
if (client_.get())
handler = client_->GetPrintHandler();
// Ask the handler if they want to update the print options.
if (handler.get() && handler->GetPrintOptions(this, print_options)) {
settings.UpdateFromPrintOptions(print_options);
print_context_.InitWithSettings(settings);
}
}
if (print_context_.AskUserForSettings(
UIT_GetMainWndHandle(), UIT_GetPagesCount(frame), false)
!= printing::PrintingContext::OK)
return;
printing::PrintParams params;
const printing::PrintSettings &settings = print_context_.settings();
settings.RenderParams(&params);
int page_count = 0;
gfx::Size canvas_size;
canvas_size.set_width(
printing::ConvertUnit(
settings.page_setup_pixels().content_area().width(),
static_cast<int>(params.dpi),
params.desired_dpi));
canvas_size.set_height(
printing::ConvertUnit(
settings.page_setup_pixels().content_area().height(),
static_cast<int>(params.dpi),
params.desired_dpi));
WebKit::WebPrintParams printParams(
WebSize(canvas_size.width(), canvas_size.height()));
page_count = frame->printBegin(printParams);
if (page_count) {
bool old_state = MessageLoop::current()->NestableTasksAllowed();
MessageLoop::current()->SetNestableTasksAllowed(false);
if (print_context_.NewDocument(title_) == printing::PrintingContext::OK) {
if (settings.ranges.size() > 0) {
for (unsigned x = 0; x < settings.ranges.size(); ++x) {
const printing::PageRange& range = settings.ranges[x];
for (int i = range.from; i <= range.to; ++i)
UIT_PrintPage(i, page_count, canvas_size, frame);
}
} else {
for (int i = 0; i < page_count; ++i)
UIT_PrintPage(i, page_count, canvas_size, frame);
}
print_context_.DocumentDone();
}
MessageLoop::current()->SetNestableTasksAllowed(old_state);
}
frame->printEnd();
}
int CefBrowserImpl::UIT_GetPagesCount(WebKit::WebFrame* frame) {
REQUIRE_UIT();
printing::PrintParams params;
const printing::PrintSettings &settings = print_context_.settings();
settings.RenderParams(&params);
// The dbi will be 0 if no default printer is configured.
if (params.dpi == 0)
return 0;
int page_count = 0;
gfx::Size canvas_size;
canvas_size.set_width(
printing::ConvertUnit(
settings.page_setup_pixels().content_area().width(),
static_cast<int>(params.dpi),
params.desired_dpi));
canvas_size.set_height(
printing::ConvertUnit(
settings.page_setup_pixels().content_area().height(),
static_cast<int>(params.dpi),
params.desired_dpi));
page_count = frame->printBegin(WebSize(canvas_size));
frame->printEnd();
return page_count;
}
// static
void CefBrowserImpl::UIT_CloseView(gfx::NativeView view) {
PostMessage(view, WM_CLOSE, 0, 0);
}
// static
bool CefBrowserImpl::UIT_IsViewVisible(gfx::NativeView view) {
return IsWindowVisible(view) ? true : false;
}
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