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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 "chrome_frame/find_dialog.h"
#include <richedit.h>
#include "base/guid.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome_frame/chrome_frame_automation.h"
const int kMaxFindChars = 1024;
HHOOK CFFindDialog::msg_hook_ = NULL;
CFFindDialog::CFFindDialog() {}
void CFFindDialog::Init(ChromeFrameAutomationClient* automation_client) {
automation_client_ = automation_client;
}
LRESULT CFFindDialog::OnDestroy(UINT msg, WPARAM wparam, LPARAM lparam,
BOOL& handled) {
// In order to cancel the selection when the Find dialog is dismissed, we
// do a fake search for a string that is unlikely to appear on the page.
// TODO(robertshield): Change this to plumb through a StopFinding automation
// message that triggers a ViewMsg_StopFinding.
std::string guid(base::GenerateGUID());
automation_client_->FindInPage(ASCIIToWide(guid), FWD, CASE_SENSITIVE, false);
UninstallMessageHook();
return 0;
}
LRESULT CFFindDialog::OnFind(WORD wNotifyCode, WORD wID, HWND hWndCtl,
BOOL& bHandled) {
string16 find_text(kMaxFindChars, L'\0');
find_text.resize(GetDlgItemText(IDC_FIND_TEXT, &find_text[0], kMaxFindChars));
// Repeated searches for the same string should move to the next instance.
bool find_next = (find_text == last_find_text_);
if (!find_next)
last_find_text_ = find_text;
bool match_case = IsDlgButtonChecked(IDC_MATCH_CASE) == BST_CHECKED;
bool search_down = IsDlgButtonChecked(IDC_DIRECTION_DOWN) == BST_CHECKED;
automation_client_->FindInPage(find_text,
search_down ? FWD : BACK,
match_case ? CASE_SENSITIVE : IGNORE_CASE,
find_next);
return 0;
}
LRESULT CFFindDialog::OnCancel(WORD wNotifyCode, WORD wID, HWND hWndCtl,
BOOL& bHandled) {
DestroyWindow();
return 0;
}
LRESULT CFFindDialog::OnInitDialog(UINT msg, WPARAM wparam, LPARAM lparam,
BOOL& handled) {
// Init() must be called before Create() or DoModal()!
DCHECK(automation_client_.get());
InstallMessageHook();
SendDlgItemMessage(IDC_FIND_TEXT, EM_EXLIMITTEXT, 0, kMaxFindChars);
BOOL result = CheckRadioButton(IDC_DIRECTION_DOWN, IDC_DIRECTION_UP,
IDC_DIRECTION_DOWN);
HWND text_field = GetDlgItem(IDC_FIND_TEXT);
::SetFocus(text_field);
return FALSE; // we set the focus ourselves.
}
LRESULT CALLBACK CFFindDialog::GetMsgProc(int code, WPARAM wparam,
LPARAM lparam) {
// Mostly borrowed from http://support.microsoft.com/kb/q187988/
// and http://www.codeproject.com/KB/atl/cdialogmessagehook.aspx.
LPMSG msg = reinterpret_cast<LPMSG>(lparam);
if (code >= 0 && wparam == PM_REMOVE &&
msg->message >= WM_KEYFIRST && msg->message <= WM_KEYLAST) {
HWND hwnd = GetActiveWindow();
if (::IsWindow(hwnd) && ::IsDialogMessage(hwnd, msg)) {
// The value returned from this hookproc is ignored, and it cannot
// be used to tell Windows the message has been handled. To avoid
// further processing, convert the message to WM_NULL before
// returning.
msg->hwnd = NULL;
msg->message = WM_NULL;
msg->lParam = 0L;
msg->wParam = 0;
}
}
// Passes the hook information to the next hook procedure in
// the current hook chain.
return ::CallNextHookEx(msg_hook_, code, wparam, lparam);
}
bool CFFindDialog::InstallMessageHook() {
// Make sure we only call this once.
DCHECK(msg_hook_ == NULL);
msg_hook_ = ::SetWindowsHookEx(WH_GETMESSAGE, &CFFindDialog::GetMsgProc,
_AtlBaseModule.m_hInst, GetCurrentThreadId());
DCHECK(msg_hook_ != NULL);
return msg_hook_ != NULL;
}
bool CFFindDialog::UninstallMessageHook() {
DCHECK(msg_hook_ != NULL);
BOOL result = ::UnhookWindowsHookEx(msg_hook_);
DCHECK(result);
msg_hook_ = NULL;
return result != FALSE;
}
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