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cef/libcef/browser/browser_host_impl_win.cc
Marshall Greenblatt d640978350 Check that the return value of CefClient::GetRenderHandler is non-NULL (issue #1504). 
git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1995 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
2015-01-26 00:57:01 +00:00

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// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions 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 "libcef/browser/browser_host_impl.h"
#include <commdlg.h>
#include <dwmapi.h>
#include <shellapi.h>
#include <shlobj.h>
#include <wininet.h>
#include <winspool.h>
#include "libcef/browser/content_browser_client.h"
#include "libcef/browser/context.h"
#include "libcef/browser/thread_util.h"
#include "libcef/browser/window_delegate_view.h"
#include "base/files/file_util.h"
#include "base/i18n/case_conversion.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/registry.h"
#include "base/win/scoped_comptr.h"
#include "base/win/windows_version.h"
#include "content/common/cursors/webcursor.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/common/file_chooser_params.h"
#include "grit/cef_strings.h"
#include "grit/ui_strings.h"
#include "grit/ui_unscaled_resources.h"
#include "net/base/mime_util.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
#include "ui/aura/window_tree_host.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/win/shell.h"
#include "ui/gfx/win/hwnd_util.h"
#include "ui/views/widget/desktop_aura/desktop_window_tree_host_win.h"
#include "ui/views/widget/widget.h"
#include "ui/views/win/hwnd_message_handler_delegate.h"
#include "ui/views/win/hwnd_util.h"
#pragma comment(lib, "dwmapi.lib")
namespace {
void WriteTempFileAndView(scoped_refptr<base::RefCountedString> str) {
CEF_REQUIRE_FILET();
base::FilePath tmp_file;
if (!base::CreateTemporaryFile(&tmp_file))
return;
// The shell command will look at the file extension to identify the correct
// program to open.
tmp_file = tmp_file.AddExtension(L"txt");
const std::string& data = str->data();
int write_ct = base::WriteFile(tmp_file, data.c_str(), data.size());
DCHECK_EQ(static_cast<int>(data.size()), write_ct);
ui::win::OpenItemViaShell(tmp_file);
}
// From ui/base/dialogs/select_file_dialog_win.cc.
// Get the file type description from the registry. This will be "Text Document"
// for .txt files, "JPEG Image" for .jpg files, etc. If the registry doesn't
// have an entry for the file type, we return false, true if the description was
// found. 'file_ext' must be in form ".txt".
static bool GetRegistryDescriptionFromExtension(const std::wstring& file_ext,
std::wstring* reg_description) {
DCHECK(reg_description);
base::win::RegKey reg_ext(HKEY_CLASSES_ROOT, file_ext.c_str(), KEY_READ);
std::wstring reg_app;
if (reg_ext.ReadValue(NULL, &reg_app) == ERROR_SUCCESS && !reg_app.empty()) {
base::win::RegKey reg_link(HKEY_CLASSES_ROOT, reg_app.c_str(), KEY_READ);
if (reg_link.ReadValue(NULL, reg_description) == ERROR_SUCCESS)
return true;
}
return false;
}
// Set up a filter for a Save/Open dialog, which will consist of |file_ext| file
// extensions (internally separated by semicolons), |ext_desc| as the text
// descriptions of the |file_ext| types (optional), and (optionally) the default
// 'All Files' view. The purpose of the filter is to show only files of a
// particular type in a Windows Save/Open dialog box. The resulting filter is
// returned. The filters created here are:
// 1. only files that have 'file_ext' as their extension
// 2. all files (only added if 'include_all_files' is true)
// Example:
// file_ext: { "*.txt", "*.htm;*.html" }
// ext_desc: { "Text Document" }
// returned: "Text Document\0*.txt\0HTML Document\0*.htm;*.html\0"
// "All Files\0*.*\0\0" (in one big string)
// If a description is not provided for a file extension, it will be retrieved
// from the registry. If the file extension does not exist in the registry, it
// will be omitted from the filter, as it is likely a bogus extension.
std::wstring FormatFilterForExtensions(
const std::vector<std::wstring>& file_ext,
const std::vector<std::wstring>& ext_desc,
bool include_all_files) {
const std::wstring all_ext = L"*.*";
const std::wstring all_desc =
l10n_util::GetStringUTF16(IDS_APP_SAVEAS_ALL_FILES) +
L" (" + all_ext + L")";
DCHECK(file_ext.size() >= ext_desc.size());
if (file_ext.empty())
include_all_files = true;
std::wstring result;
for (size_t i = 0; i < file_ext.size(); ++i) {
std::wstring ext = file_ext[i];
std::wstring desc;
if (i < ext_desc.size())
desc = ext_desc[i];
if (ext.empty()) {
// Force something reasonable to appear in the dialog box if there is no
// extension provided.
include_all_files = true;
continue;
}
if (desc.empty()) {
DCHECK(ext.find(L'.') != std::wstring::npos);
std::wstring first_extension = ext.substr(ext.find(L'.'));
size_t first_separator_index = first_extension.find(L';');
if (first_separator_index != std::wstring::npos)
first_extension = first_extension.substr(0, first_separator_index);
// Find the extension name without the preceeding '.' character.
std::wstring ext_name = first_extension;
size_t ext_index = ext_name.find_first_not_of(L'.');
if (ext_index != std::wstring::npos)
ext_name = ext_name.substr(ext_index);
if (!GetRegistryDescriptionFromExtension(first_extension, &desc)) {
// The extension doesn't exist in the registry.
include_all_files = true;
}
}
if (!desc.empty())
desc += L" (" + ext + L")";
else
desc = ext;
result.append(desc.c_str(), desc.size() + 1); // Append NULL too.
result.append(ext.c_str(), ext.size() + 1);
}
if (include_all_files) {
result.append(all_desc.c_str(), all_desc.size() + 1);
result.append(all_ext.c_str(), all_ext.size() + 1);
}
result.append(1, '\0'); // Double NULL required.
return result;
}
std::wstring GetDescriptionFromMimeType(const std::string& mime_type) {
// Check for wild card mime types and return an appropriate description.
static const struct {
const char* mime_type;
int string_id;
} kWildCardMimeTypes[] = {
{ "audio", IDS_APP_AUDIO_FILES },
{ "image", IDS_APP_IMAGE_FILES },
{ "text", IDS_APP_TEXT_FILES },
{ "video", IDS_APP_VIDEO_FILES },
};
for (size_t i = 0; i < arraysize(kWildCardMimeTypes); ++i) {
if (mime_type == std::string(kWildCardMimeTypes[i].mime_type) + "/*")
return l10n_util::GetStringUTF16(kWildCardMimeTypes[i].string_id);
}
return std::wstring();
}
std::wstring GetFilterString(
const std::vector<base::string16>& accept_filters) {
std::vector<std::wstring> extensions;
std::vector<std::wstring> descriptions;
for (size_t i = 0; i < accept_filters.size(); ++i) {
const base::string16& filter = accept_filters[i];
if (filter.empty())
continue;
size_t sep_index = filter.find('|');
if (sep_index != base::string16::npos) {
// Treat as a filter of the form "Filter Name|.ext1;.ext2;.ext3".
const base::string16& desc = filter.substr(0, sep_index);
std::vector<base::string16> ext;
base::SplitString(filter.substr(sep_index + 1), ';', &ext);
std::wstring ext_str;
for (size_t x = 0; x < ext.size(); ++x) {
const base::string16& file_ext = ext[x];
if (!file_ext.empty() && file_ext[0] == '.') {
if (!ext_str.empty())
ext_str += L";";
ext_str += L"*" + file_ext;
}
}
if (!ext_str.empty()) {
extensions.push_back(ext_str);
descriptions.push_back(desc);
}
} else if (filter[0] == L'.') {
// Treat as an extension beginning with the '.' character.
extensions.push_back(L"*" + filter);
descriptions.push_back(std::wstring());
} else {
// Otherwise convert mime type to one or more extensions.
const std::string& ascii = base::UTF16ToASCII(filter);
std::vector<base::FilePath::StringType> ext;
std::wstring ext_str;
net::GetExtensionsForMimeType(ascii, &ext);
if (!ext.empty()) {
for (size_t x = 0; x < ext.size(); ++x) {
if (x != 0)
ext_str += L";";
ext_str += L"*." + ext[x];
}
extensions.push_back(ext_str);
descriptions.push_back(GetDescriptionFromMimeType(ascii));
}
}
}
return FormatFilterForExtensions(extensions, descriptions, true);
}
// from chrome/browser/views/shell_dialogs_win.cc
bool RunOpenFileDialog(const CefBrowserHostImpl::FileChooserParams& params,
HWND owner,
int* filter_index,
base::FilePath* path) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
wchar_t filename[MAX_PATH] = {0};
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
std::wstring directory;
if (!params.default_file_name.empty()) {
if (params.default_file_name.EndsWithSeparator()) {
// The value is only a directory.
directory = params.default_file_name.value();
} else {
// The value is a file name and possibly a directory.
base::wcslcpy(filename, params.default_file_name.value().c_str(),
arraysize(filename));
directory = params.default_file_name.DirName().value();
}
}
if (!directory.empty())
ofn.lpstrInitialDir = directory.c_str();
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_OPEN_FILE_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR | OFN_EXPLORER |
OFN_ENABLESIZING;
if (params.hidereadonly)
ofn.Flags |= OFN_HIDEREADONLY;
const std::wstring& filter = GetFilterString(params.accept_types);
if (!filter.empty()) {
ofn.lpstrFilter = filter.c_str();
// Indices into |lpstrFilter| start at 1.
ofn.nFilterIndex = *filter_index + 1;
}
bool success = !!GetOpenFileName(&ofn);
if (success) {
*filter_index = ofn.nFilterIndex == 0 ? 0 : ofn.nFilterIndex - 1;
*path = base::FilePath(filename);
}
return success;
}
bool RunOpenMultiFileDialog(const CefBrowserHostImpl::FileChooserParams& params,
HWND owner,
int* filter_index,
std::vector<base::FilePath>* paths) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
scoped_ptr<wchar_t[]> filename(new wchar_t[UNICODE_STRING_MAX_CHARS]);
filename[0] = 0;
ofn.lpstrFile = filename.get();
ofn.nMaxFile = UNICODE_STRING_MAX_CHARS;
std::wstring directory;
if (!params.default_file_name.empty()) {
if (params.default_file_name.EndsWithSeparator()) {
// The value is only a directory.
directory = params.default_file_name.value();
} else {
// The value is a file name and possibly a directory.
directory = params.default_file_name.DirName().value();
}
}
if (!directory.empty())
ofn.lpstrInitialDir = directory.c_str();
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_OPEN_FILES_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER |
OFN_ALLOWMULTISELECT | OFN_ENABLESIZING;
if (params.hidereadonly)
ofn.Flags |= OFN_HIDEREADONLY;
const std::wstring& filter = GetFilterString(params.accept_types);
if (!filter.empty()) {
ofn.lpstrFilter = filter.c_str();
// Indices into |lpstrFilter| start at 1.
ofn.nFilterIndex = *filter_index + 1;
}
bool success = !!GetOpenFileName(&ofn);
if (success) {
std::vector<base::FilePath> files;
const wchar_t* selection = ofn.lpstrFile;
while (*selection) { // Empty string indicates end of list.
files.push_back(base::FilePath(selection));
// Skip over filename and null-terminator.
selection += files.back().value().length() + 1;
}
if (files.empty()) {
success = false;
} else if (files.size() == 1) {
// When there is one file, it contains the path and filename.
paths->swap(files);
} else {
// Otherwise, the first string is the path, and the remainder are
// filenames.
std::vector<base::FilePath>::iterator path = files.begin();
for (std::vector<base::FilePath>::iterator file = path + 1;
file != files.end(); ++file) {
paths->push_back(path->Append(*file));
}
}
}
if (success)
*filter_index = ofn.nFilterIndex == 0 ? 0 : ofn.nFilterIndex - 1;
return success;
}
// The callback function for when the select folder dialog is opened.
int CALLBACK BrowseCallbackProc(HWND window,
UINT message,
LPARAM parameter,
LPARAM data)
{
if (message == BFFM_INITIALIZED) {
// WParam is TRUE since passing a path.
// data lParam member of the BROWSEINFO structure.
SendMessage(window, BFFM_SETSELECTION, TRUE, (LPARAM)data);
}
return 0;
}
bool RunOpenFolderDialog(const CefBrowserHostImpl::FileChooserParams& params,
HWND owner,
base::FilePath* path) {
wchar_t dir_buffer[MAX_PATH + 1] = {0};
bool result = false;
BROWSEINFO browse_info = {0};
browse_info.hwndOwner = owner;
browse_info.pszDisplayName = dir_buffer;
browse_info.ulFlags = BIF_USENEWUI | BIF_RETURNONLYFSDIRS;
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_SELECT_FOLDER_DIALOG_TITLE);
if (!title.empty())
browse_info.lpszTitle = title.c_str();
const std::wstring& file_path = params.default_file_name.value();
if (!file_path.empty()) {
// Highlight the current value.
browse_info.lParam = (LPARAM)file_path.c_str();
browse_info.lpfn = &BrowseCallbackProc;
}
LPITEMIDLIST list = SHBrowseForFolder(&browse_info);
if (list) {
STRRET out_dir_buffer;
ZeroMemory(&out_dir_buffer, sizeof(out_dir_buffer));
out_dir_buffer.uType = STRRET_WSTR;
base::win::ScopedComPtr<IShellFolder> shell_folder;
if (SHGetDesktopFolder(shell_folder.Receive()) == NOERROR) {
HRESULT hr = shell_folder->GetDisplayNameOf(list, SHGDN_FORPARSING,
&out_dir_buffer);
if (SUCCEEDED(hr) && out_dir_buffer.uType == STRRET_WSTR) {
*path = base::FilePath(out_dir_buffer.pOleStr);
CoTaskMemFree(out_dir_buffer.pOleStr);
result = true;
} else {
// Use old way if we don't get what we want.
wchar_t old_out_dir_buffer[MAX_PATH + 1];
if (SHGetPathFromIDList(list, old_out_dir_buffer)) {
*path = base::FilePath(old_out_dir_buffer);
result = true;
}
}
}
CoTaskMemFree(list);
}
return result;
}
bool RunSaveFileDialog(const CefBrowserHostImpl::FileChooserParams& params,
HWND owner,
int* filter_index,
base::FilePath* path) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
wchar_t filename[MAX_PATH] = {0};
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
std::wstring directory;
if (!params.default_file_name.empty()) {
if (params.default_file_name.EndsWithSeparator()) {
// The value is only a directory.
directory = params.default_file_name.value();
} else {
// The value is a file name and possibly a directory.
base::wcslcpy(filename, params.default_file_name.value().c_str(),
arraysize(filename));
directory = params.default_file_name.DirName().value();
}
}
if (!directory.empty())
ofn.lpstrInitialDir = directory.c_str();
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_SAVE_AS_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_EXPLORER | OFN_ENABLESIZING | OFN_NOCHANGEDIR |
OFN_PATHMUSTEXIST;
if (params.hidereadonly)
ofn.Flags |= OFN_HIDEREADONLY;
if (params.overwriteprompt)
ofn.Flags |= OFN_OVERWRITEPROMPT;
const std::wstring& filter = GetFilterString(params.accept_types);
if (!filter.empty()) {
ofn.lpstrFilter = filter.c_str();
// Indices into |lpstrFilter| start at 1.
ofn.nFilterIndex = *filter_index + 1;
}
bool success = !!GetSaveFileName(&ofn);
if (success) {
*filter_index = ofn.nFilterIndex == 0 ? 0 : ofn.nFilterIndex - 1;
*path = base::FilePath(filename);
}
return success;
}
// According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
// "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
// ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
// support URLS of 2083 chars in length, 2K is safe."
const int kMaxAddressLengthChars = 2048;
bool HasExternalHandler(const std::string& scheme) {
base::win::RegKey key;
const std::wstring registry_path =
base::ASCIIToUTF16(scheme + "\\shell\\open\\command");
key.Open(HKEY_CLASSES_ROOT, registry_path.c_str(), KEY_READ);
if (key.Valid()) {
DWORD size = 0;
key.ReadValue(NULL, NULL, &size, NULL);
if (size > 2) {
// ShellExecute crashes the process when the command is empty.
// We check for "2" because it always returns the trailing NULL.
return true;
}
}
return false;
}
WORD KeyStatesToWord() {
static const USHORT kHighBitMaskShort = 0x8000;
WORD result = 0;
if (GetKeyState(VK_CONTROL) & kHighBitMaskShort)
result |= MK_CONTROL;
if (GetKeyState(VK_SHIFT) & kHighBitMaskShort)
result |= MK_SHIFT;
if (GetKeyState(VK_LBUTTON) & kHighBitMaskShort)
result |= MK_LBUTTON;
if (GetKeyState(VK_MBUTTON) & kHighBitMaskShort)
result |= MK_MBUTTON;
if (GetKeyState(VK_RBUTTON) & kHighBitMaskShort)
result |= MK_RBUTTON;
return result;
}
// From content/common/cursors/webcursor_win.cc.
using blink::WebCursorInfo;
LPCWSTR ToCursorID(WebCursorInfo::Type type) {
switch (type) {
case WebCursorInfo::TypePointer:
return IDC_ARROW;
case WebCursorInfo::TypeCross:
return IDC_CROSS;
case WebCursorInfo::TypeHand:
return IDC_HAND;
case WebCursorInfo::TypeIBeam:
return IDC_IBEAM;
case WebCursorInfo::TypeWait:
return IDC_WAIT;
case WebCursorInfo::TypeHelp:
return IDC_HELP;
case WebCursorInfo::TypeEastResize:
return IDC_SIZEWE;
case WebCursorInfo::TypeNorthResize:
return IDC_SIZENS;
case WebCursorInfo::TypeNorthEastResize:
return IDC_SIZENESW;
case WebCursorInfo::TypeNorthWestResize:
return IDC_SIZENWSE;
case WebCursorInfo::TypeSouthResize:
return IDC_SIZENS;
case WebCursorInfo::TypeSouthEastResize:
return IDC_SIZENWSE;
case WebCursorInfo::TypeSouthWestResize:
return IDC_SIZENESW;
case WebCursorInfo::TypeWestResize:
return IDC_SIZEWE;
case WebCursorInfo::TypeNorthSouthResize:
return IDC_SIZENS;
case WebCursorInfo::TypeEastWestResize:
return IDC_SIZEWE;
case WebCursorInfo::TypeNorthEastSouthWestResize:
return IDC_SIZENESW;
case WebCursorInfo::TypeNorthWestSouthEastResize:
return IDC_SIZENWSE;
case WebCursorInfo::TypeColumnResize:
return MAKEINTRESOURCE(IDC_COLRESIZE);
case WebCursorInfo::TypeRowResize:
return MAKEINTRESOURCE(IDC_ROWRESIZE);
case WebCursorInfo::TypeMiddlePanning:
return MAKEINTRESOURCE(IDC_PAN_MIDDLE);
case WebCursorInfo::TypeEastPanning:
return MAKEINTRESOURCE(IDC_PAN_EAST);
case WebCursorInfo::TypeNorthPanning:
return MAKEINTRESOURCE(IDC_PAN_NORTH);
case WebCursorInfo::TypeNorthEastPanning:
return MAKEINTRESOURCE(IDC_PAN_NORTH_EAST);
case WebCursorInfo::TypeNorthWestPanning:
return MAKEINTRESOURCE(IDC_PAN_NORTH_WEST);
case WebCursorInfo::TypeSouthPanning:
return MAKEINTRESOURCE(IDC_PAN_SOUTH);
case WebCursorInfo::TypeSouthEastPanning:
return MAKEINTRESOURCE(IDC_PAN_SOUTH_EAST);
case WebCursorInfo::TypeSouthWestPanning:
return MAKEINTRESOURCE(IDC_PAN_SOUTH_WEST);
case WebCursorInfo::TypeWestPanning:
return MAKEINTRESOURCE(IDC_PAN_WEST);
case WebCursorInfo::TypeMove:
return IDC_SIZEALL;
case WebCursorInfo::TypeVerticalText:
return MAKEINTRESOURCE(IDC_VERTICALTEXT);
case WebCursorInfo::TypeCell:
return MAKEINTRESOURCE(IDC_CELL);
case WebCursorInfo::TypeContextMenu:
return MAKEINTRESOURCE(IDC_ARROW);
case WebCursorInfo::TypeAlias:
return MAKEINTRESOURCE(IDC_ALIAS);
case WebCursorInfo::TypeProgress:
return IDC_APPSTARTING;
case WebCursorInfo::TypeNoDrop:
return IDC_NO;
case WebCursorInfo::TypeCopy:
return MAKEINTRESOURCE(IDC_COPYCUR);
case WebCursorInfo::TypeNone:
return MAKEINTRESOURCE(IDC_CURSOR_NONE);
case WebCursorInfo::TypeNotAllowed:
return IDC_NO;
case WebCursorInfo::TypeZoomIn:
return MAKEINTRESOURCE(IDC_ZOOMIN);
case WebCursorInfo::TypeZoomOut:
return MAKEINTRESOURCE(IDC_ZOOMOUT);
case WebCursorInfo::TypeGrab:
return MAKEINTRESOURCE(IDC_HAND_GRAB);
case WebCursorInfo::TypeGrabbing:
return MAKEINTRESOURCE(IDC_HAND_GRABBING);
}
NOTREACHED();
return NULL;
}
bool IsSystemCursorID(LPCWSTR cursor_id) {
return cursor_id >= IDC_ARROW; // See WinUser.h
}
} // namespace
// static
void CefBrowserHostImpl::RegisterWindowClass() {
// Register the window class
WNDCLASSEX wcex = {
/* cbSize = */ sizeof(WNDCLASSEX),
/* style = */ CS_HREDRAW | CS_VREDRAW,
/* lpfnWndProc = */ CefBrowserHostImpl::WndProc,
/* cbClsExtra = */ 0,
/* cbWndExtra = */ 0,
/* hInstance = */ ::GetModuleHandle(NULL),
/* hIcon = */ NULL,
/* hCursor = */ LoadCursor(NULL, IDC_ARROW),
/* hbrBackground = */ 0,
/* lpszMenuName = */ NULL,
/* lpszClassName = */ CefBrowserHostImpl::GetWndClass(),
/* hIconSm = */ NULL,
};
RegisterClassEx(&wcex);
}
// static
LPCTSTR CefBrowserHostImpl::GetWndClass() {
return L"CefBrowserWindow";
}
// static
LRESULT CALLBACK CefBrowserHostImpl::WndProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam) {
CefBrowserHostImpl* browser =
static_cast<CefBrowserHostImpl*>(gfx::GetWindowUserData(hwnd));
switch (message) {
case WM_CLOSE:
// Protect against multiple requests to close while the close is pending.
if (browser && browser->destruction_state() <= DESTRUCTION_STATE_PENDING) {
if (browser->destruction_state() == DESTRUCTION_STATE_NONE) {
// Request that the browser close.
browser->CloseBrowser(false);
}
// Cancel the close.
return 0;
}
// Allow the close.
break;
case WM_DESTROY:
if (browser) {
// Clear the user data pointer.
gfx::SetWindowUserData(hwnd, NULL);
// Force the browser to be destroyed and release the reference added in
// PlatformCreateWindow().
browser->WindowDestroyed();
}
return 0;
case WM_SIZE:
if (browser && browser->window_widget_) {
// Pass window resize events to the HWND for the DesktopNativeWidgetAura
// root window. Passing size 0x0 (wParam == SIZE_MINIMIZED, for example)
// will cause the widget to be hidden which reduces resource usage.
RECT rc;
GetClientRect(hwnd, &rc);
SetWindowPos(HWNDForWidget(browser->window_widget_), NULL,
rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top,
SWP_NOZORDER);
}
return 0;
case WM_MOVING:
case WM_MOVE:
if (browser)
browser->NotifyMoveOrResizeStarted();
return 0;
case WM_SETFOCUS:
if (browser)
browser->SetFocus(true);
return 0;
case WM_ERASEBKGND:
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
ui::PlatformCursor CefBrowserHostImpl::GetPlatformCursor(
blink::WebCursorInfo::Type type) {
HMODULE module_handle = NULL;
const wchar_t* cursor_id = ToCursorID(type);
if (!IsSystemCursorID(cursor_id)) {
module_handle = ::GetModuleHandle(
CefContentBrowserClient::Get()->GetResourceDllName());
if (!module_handle)
module_handle = ::GetModuleHandle(NULL);
}
return LoadCursor(module_handle, cursor_id);
}
bool CefBrowserHostImpl::PlatformCreateWindow() {
std::wstring windowName(CefString(&window_info_.window_name));
// Create the new browser window.
window_info_.window = CreateWindowEx(window_info_.ex_style,
GetWndClass(), windowName.c_str(), window_info_.style,
window_info_.x, window_info_.y, window_info_.width,
window_info_.height, window_info_.parent_window, window_info_.menu,
::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_.window != NULL);
if (!window_info_.window)
return false;
// Set window user data to this object for future reference from the window
// procedure.
gfx::SetWindowUserData(window_info_.window, this);
// Add a reference that will be released in the WM_DESTROY handler.
AddRef();
RECT cr;
GetClientRect(window_info_.window, &cr);
DCHECK(!window_widget_);
SkColor background_color = SK_ColorWHITE;
const CefSettings& settings = CefContext::Get()->settings();
if (CefColorGetA(settings.background_color) > 0) {
background_color = SkColorSetRGB(
CefColorGetR(settings.background_color),
CefColorGetG(settings.background_color),
CefColorGetB(settings.background_color));
}
CefWindowDelegateView* delegate_view =
new CefWindowDelegateView(background_color);
delegate_view->Init(window_info_.window,
web_contents(),
gfx::Rect(0, 0, cr.right, cr.bottom));
window_widget_ = delegate_view->GetWidget();
window_widget_->Show();
return true;
}
void CefBrowserHostImpl::PlatformCloseWindow() {
if (window_info_.window != NULL) {
HWND frameWnd = GetAncestor(window_info_.window, GA_ROOT);
PostMessage(frameWnd, WM_CLOSE, 0, 0);
}
}
void CefBrowserHostImpl::PlatformSizeTo(int width, int height) {
RECT rect = {0, 0, width, height};
DWORD style = GetWindowLong(window_info_.window, GWL_STYLE);
DWORD ex_style = GetWindowLong(window_info_.window, GWL_EXSTYLE);
bool has_menu = !(style & WS_CHILD) && (GetMenu(window_info_.window) != NULL);
// The size value is for the client area. Calculate the whole window size
// based on the current style.
AdjustWindowRectEx(&rect, style, has_menu, ex_style);
// Size the window.
SetWindowPos(window_info_.window, NULL, 0, 0, rect.right,
rect.bottom, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
}
void CefBrowserHostImpl::PlatformSetFocus(bool focus) {
if (!focus)
return;
if (web_contents_) {
// Give logical focus to the RenderWidgetHostViewAura in the views
// hierarchy. This does not change the native keyboard focus.
web_contents_->Focus();
}
if (window_widget_) {
// Give native focus to the DesktopNativeWidgetAura for the root window.
// Needs to be done via the HWND so that keyboard focus is assigned
// correctly. DesktopNativeWidgetAura will update focus state on the
// aura::Window when WM_SETFOCUS and WM_KILLFOCUS are received.
::SetFocus(HWNDForWidget(window_widget_));
}
}
CefWindowHandle CefBrowserHostImpl::PlatformGetWindowHandle() {
return IsWindowless() ? window_info_.parent_window : window_info_.window;
}
bool CefBrowserHostImpl::PlatformViewText(const std::string& text) {
CEF_REQUIRE_UIT();
std::string str = text;
scoped_refptr<base::RefCountedString> str_ref =
base::RefCountedString::TakeString(&str);
CEF_POST_TASK(CEF_FILET, base::Bind(WriteTempFileAndView, str_ref));
return true;
}
void CefBrowserHostImpl::PlatformHandleKeyboardEvent(
const content::NativeWebKeyboardEvent& event) {
// Any unhandled keyboard/character messages are sent to DefWindowProc so that
// shortcut keys work correctly.
if (event.os_event) {
const MSG& msg = event.os_event->native_event();
DefWindowProc(msg.hwnd, msg.message, msg.wParam, msg.lParam);
} else {
MSG msg = {};
msg.hwnd = PlatformGetWindowHandle();
if (!msg.hwnd)
return;
switch (event.type) {
case blink::WebInputEvent::RawKeyDown:
msg.message = event.isSystemKey ? WM_SYSKEYDOWN : WM_KEYDOWN;
break;
case blink::WebInputEvent::KeyUp:
msg.message = event.isSystemKey ? WM_SYSKEYUP : WM_KEYUP;
break;
case blink::WebInputEvent::Char:
msg.message = event.isSystemKey ? WM_SYSCHAR: WM_CHAR;
break;
default:
NOTREACHED();
return;
}
msg.wParam = event.windowsKeyCode;
UINT scan_code = ::MapVirtualKeyW(event.windowsKeyCode, MAPVK_VK_TO_VSC);
msg.lParam = (scan_code << 16) | // key scan code
1; // key repeat count
if (event.modifiers & content::NativeWebKeyboardEvent::AltKey)
msg.lParam |= (1 << 29);
DefWindowProc(msg.hwnd, msg.message, msg.wParam, msg.lParam);
}
}
void CefBrowserHostImpl::PlatformRunFileChooser(
const FileChooserParams& params,
RunFileChooserCallback callback) {
int filter_index = params.selected_accept_filter;
std::vector<base::FilePath> files;
HWND owner = PlatformGetWindowHandle();
if (params.mode == content::FileChooserParams::Open) {
base::FilePath file;
if (RunOpenFileDialog(params, owner, &filter_index, &file))
files.push_back(file);
} else if (params.mode == content::FileChooserParams::OpenMultiple) {
RunOpenMultiFileDialog(params, owner, &filter_index, &files);
} else if (params.mode == content::FileChooserParams::UploadFolder) {
base::FilePath file;
if (RunOpenFolderDialog(params, owner, &file))
files.push_back(file);
} else if (params.mode == content::FileChooserParams::Save) {
base::FilePath file;
if (RunSaveFileDialog(params, owner, &filter_index, &file))
files.push_back(file);
} else {
NOTIMPLEMENTED();
}
callback.Run(filter_index, files);
}
void CefBrowserHostImpl::PlatformHandleExternalProtocol(const GURL& url) {
if (CEF_CURRENTLY_ON_FILET()) {
if (!HasExternalHandler(url.scheme()))
return;
const std::string& address = url.spec();
if (address.length() > kMaxAddressLengthChars)
return;
ShellExecuteA(NULL, "open", address.c_str(), NULL, NULL, SW_SHOWNORMAL);
} else {
// Execute on the FILE thread.
CEF_POST_TASK(CEF_FILET,
base::Bind(&CefBrowserHostImpl::PlatformHandleExternalProtocol, this,
url));
}
}
void CefBrowserHostImpl::PlatformTranslateKeyEvent(
content::NativeWebKeyboardEvent& result, const CefKeyEvent& key_event) {
result.timeStampSeconds = GetMessageTime() / 1000.0;
result.windowsKeyCode = key_event.windows_key_code;
result.nativeKeyCode = key_event.native_key_code;
result.isSystemKey = key_event.is_system_key ? 1 : 0;
switch (key_event.type) {
case KEYEVENT_RAWKEYDOWN:
case KEYEVENT_KEYDOWN:
result.type = blink::WebInputEvent::RawKeyDown;
break;
case KEYEVENT_KEYUP:
result.type = blink::WebInputEvent::KeyUp;
break;
case KEYEVENT_CHAR:
result.type = blink::WebInputEvent::Char;
break;
default:
NOTREACHED();
}
if (result.type == blink::WebInputEvent::Char ||
result.type == blink::WebInputEvent::RawKeyDown) {
result.text[0] = result.windowsKeyCode;
result.unmodifiedText[0] = result.windowsKeyCode;
}
if (result.type != blink::WebInputEvent::Char)
result.setKeyIdentifierFromWindowsKeyCode();
result.modifiers |= TranslateModifiers(key_event.modifiers);
}
void CefBrowserHostImpl::PlatformTranslateClickEvent(
blink::WebMouseEvent& result,
const CefMouseEvent& mouse_event,
CefBrowserHost::MouseButtonType type,
bool mouseUp, int clickCount) {
PlatformTranslateMouseEvent(result, mouse_event);
switch (type) {
case MBT_LEFT:
result.type = mouseUp ? blink::WebInputEvent::MouseUp :
blink::WebInputEvent::MouseDown;
result.button = blink::WebMouseEvent::ButtonLeft;
break;
case MBT_MIDDLE:
result.type = mouseUp ? blink::WebInputEvent::MouseUp :
blink::WebInputEvent::MouseDown;
result.button = blink::WebMouseEvent::ButtonMiddle;
break;
case MBT_RIGHT:
result.type = mouseUp ? blink::WebInputEvent::MouseUp :
blink::WebInputEvent::MouseDown;
result.button = blink::WebMouseEvent::ButtonRight;
break;
default:
NOTREACHED();
}
result.clickCount = clickCount;
}
void CefBrowserHostImpl::PlatformTranslateMoveEvent(
blink::WebMouseEvent& result,
const CefMouseEvent& mouse_event,
bool mouseLeave) {
PlatformTranslateMouseEvent(result, mouse_event);
if (!mouseLeave) {
result.type = blink::WebInputEvent::MouseMove;
if (mouse_event.modifiers & EVENTFLAG_LEFT_MOUSE_BUTTON)
result.button = blink::WebMouseEvent::ButtonLeft;
else if (mouse_event.modifiers & EVENTFLAG_MIDDLE_MOUSE_BUTTON)
result.button = blink::WebMouseEvent::ButtonMiddle;
else if (mouse_event.modifiers & EVENTFLAG_RIGHT_MOUSE_BUTTON)
result.button = blink::WebMouseEvent::ButtonRight;
else
result.button = blink::WebMouseEvent::ButtonNone;
} else {
result.type = blink::WebInputEvent::MouseLeave;
result.button = blink::WebMouseEvent::ButtonNone;
}
result.clickCount = 0;
}
void CefBrowserHostImpl::PlatformTranslateWheelEvent(
blink::WebMouseWheelEvent& result,
const CefMouseEvent& mouse_event,
int deltaX, int deltaY) {
PlatformTranslateMouseEvent(result, mouse_event);
result.type = blink::WebInputEvent::MouseWheel;
result.button = blink::WebMouseEvent::ButtonNone;
float wheelDelta;
bool horizontalScroll = false;
wheelDelta = static_cast<float>(deltaY ? deltaY : deltaX);
horizontalScroll = (deltaY == 0);
static const ULONG defaultScrollCharsPerWheelDelta = 1;
static const FLOAT scrollbarPixelsPerLine = 100.0f / 3.0f;
static const ULONG defaultScrollLinesPerWheelDelta = 3;
wheelDelta /= WHEEL_DELTA;
float scrollDelta = wheelDelta;
if (horizontalScroll) {
ULONG scrollChars = defaultScrollCharsPerWheelDelta;
SystemParametersInfo(SPI_GETWHEELSCROLLCHARS, 0, &scrollChars, 0);
scrollDelta *= static_cast<FLOAT>(scrollChars) * scrollbarPixelsPerLine;
} else {
ULONG scrollLines = defaultScrollLinesPerWheelDelta;
SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &scrollLines, 0);
if (scrollLines == WHEEL_PAGESCROLL)
result.scrollByPage = true;
if (!result.scrollByPage)
scrollDelta *= static_cast<FLOAT>(scrollLines) * scrollbarPixelsPerLine;
}
// Set scroll amount based on above calculations. WebKit expects positive
// deltaY to mean "scroll up" and positive deltaX to mean "scroll left".
if (horizontalScroll) {
result.deltaX = scrollDelta;
result.wheelTicksX = wheelDelta;
} else {
result.deltaY = scrollDelta;
result.wheelTicksY = wheelDelta;
}
}
void CefBrowserHostImpl::PlatformTranslateMouseEvent(
blink::WebMouseEvent& result,
const CefMouseEvent& mouse_event) {
// position
result.x = mouse_event.x;
result.y = mouse_event.y;
result.windowX = result.x;
result.windowY = result.y;
result.globalX = result.x;
result.globalY = result.y;
if (IsWindowless()) {
CefRefPtr<CefRenderHandler> handler = client_->GetRenderHandler();
if (handler.get()) {
handler->GetScreenPoint(this, result.x, result.y, result.globalX,
result.globalY);
}
} else {
POINT globalPoint = { result.x, result.y };
ClientToScreen(GetWindowHandle(), &globalPoint);
result.globalX = globalPoint.x;
result.globalY = globalPoint.y;
}
// modifiers
result.modifiers |= TranslateModifiers(mouse_event.modifiers);
// timestamp
result.timeStampSeconds = GetMessageTime() / 1000.0;
}
void CefBrowserHostImpl::PlatformNotifyMoveOrResizeStarted() {
if (IsWindowless())
return;
if (!window_widget_)
return;
// Notify DesktopWindowTreeHostWin of move events so that screen rectangle
// information is communicated to the renderer process and popups are
// displayed in the correct location.
views::DesktopWindowTreeHostWin* tree_host =
static_cast<views::DesktopWindowTreeHostWin*>(
aura::WindowTreeHost::GetForAcceleratedWidget(
HWNDForWidget(window_widget_)));
DCHECK(tree_host);
if (tree_host) {
// Cast to HWNDMessageHandlerDelegate so we can access HandleMove().
static_cast<views::HWNDMessageHandlerDelegate*>(tree_host)->HandleMove();
}
}
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