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/* vim: se cin sw=2 ts=2 et : */
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "TaskbarTabPreview.h"
#include "nsWindowGfx.h"
#include "nsUXThemeData.h"
#include "WinUtils.h"
#include <nsITaskbarPreviewController.h>
#define TASKBARPREVIEW_HWNDID L"TaskbarTabPreviewHwnd"
namespace mozilla {
namespace widget {
NS_IMPL_ISUPPORTS(TaskbarTabPreview, nsITaskbarTabPreview)
const wchar_t* const kWindowClass = L"MozillaTaskbarPreviewClass";
TaskbarTabPreview::TaskbarTabPreview(ITaskbarList4* aTaskbar,
nsITaskbarPreviewController* aController,
HWND aHWND, nsIDocShell* aShell)
: TaskbarPreview(aTaskbar, aController, aHWND, aShell),
mProxyWindow(nullptr),
mIcon(nullptr),
mRegistered(false) {}
TaskbarTabPreview::~TaskbarTabPreview() {
if (mIcon) {
::DestroyIcon(mIcon);
mIcon = nullptr;
}
// We need to ensure that proxy window disappears or else Bad Things happen.
if (mProxyWindow) Disable();
NS_ASSERTION(!mProxyWindow, "Taskbar proxy window was not destroyed!");
if (IsWindowAvailable()) {
DetachFromNSWindow();
} else {
mWnd = nullptr;
}
}
nsresult TaskbarTabPreview::Init() {
nsresult rv = TaskbarPreview::Init();
if (NS_FAILED(rv)) {
return rv;
}
WindowHook* hook = GetWindowHook();
if (!hook) {
return NS_ERROR_NOT_AVAILABLE;
}
return hook->AddMonitor(WM_WINDOWPOSCHANGED, MainWindowHook, this);
}
nsresult TaskbarTabPreview::ShowActive(bool active) {
NS_ASSERTION(mVisible && CanMakeTaskbarCalls(),
"ShowActive called on invisible window or before taskbar calls "
"can be made for this window");
return FAILED(
mTaskbar->SetTabActive(active ? mProxyWindow : nullptr, mWnd, 0))
? NS_ERROR_FAILURE
: NS_OK;
}
HWND& TaskbarTabPreview::PreviewWindow() { return mProxyWindow; }
nativeWindow TaskbarTabPreview::GetHWND() { return mProxyWindow; }
void TaskbarTabPreview::EnsureRegistration() {
NS_ASSERTION(mVisible && CanMakeTaskbarCalls(),
"EnsureRegistration called when it is not safe to do so");
(void)UpdateTaskbarProperties();
}
NS_IMETHODIMP
TaskbarTabPreview::GetTitle(nsAString& aTitle) {
aTitle = mTitle;
return NS_OK;
}
NS_IMETHODIMP
TaskbarTabPreview::SetTitle(const nsAString& aTitle) {
mTitle = aTitle;
return mVisible ? UpdateTitle() : NS_OK;
}
NS_IMETHODIMP
TaskbarTabPreview::SetIcon(imgIContainer* icon) {
HICON hIcon = nullptr;
if (icon) {
nsresult rv;
rv = nsWindowGfx::CreateIcon(
icon, false, LayoutDeviceIntPoint(),
nsWindowGfx::GetIconMetrics(nsWindowGfx::kSmallIcon), &hIcon);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mIcon) ::DestroyIcon(mIcon);
mIcon = hIcon;
mIconImage = icon;
return mVisible ? UpdateIcon() : NS_OK;
}
NS_IMETHODIMP
TaskbarTabPreview::GetIcon(imgIContainer** icon) {
NS_IF_ADDREF(*icon = mIconImage);
return NS_OK;
}
NS_IMETHODIMP
TaskbarTabPreview::Move(nsITaskbarTabPreview* aNext) {
if (aNext == this) return NS_ERROR_INVALID_ARG;
mNext = aNext;
return CanMakeTaskbarCalls() ? UpdateNext() : NS_OK;
}
nsresult TaskbarTabPreview::UpdateTaskbarProperties() {
if (mRegistered) return NS_OK;
if (FAILED(mTaskbar->RegisterTab(mProxyWindow, mWnd)))
return NS_ERROR_FAILURE;
nsresult rv = UpdateNext();
NS_ENSURE_SUCCESS(rv, rv);
rv = TaskbarPreview::UpdateTaskbarProperties();
mRegistered = true;
return rv;
}
LRESULT
TaskbarTabPreview::WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam) {
RefPtr<TaskbarTabPreview> kungFuDeathGrip(this);
switch (nMsg) {
case WM_CREATE:
TaskbarPreview::EnableCustomDrawing(mProxyWindow, true);
return 0;
case WM_CLOSE:
mController->OnClose();
return 0;
case WM_ACTIVATE:
if (LOWORD(wParam) == WA_ACTIVE) {
// Activate the tab the user selected then restore the main window,
// keeping normal/max window state intact.
bool activateWindow;
nsresult rv = mController->OnActivate(&activateWindow);
if (NS_SUCCEEDED(rv) && activateWindow) {
nsWindow* win = WinUtils::GetNSWindowPtr(mWnd);
if (win) {
nsWindow* parent = win->GetTopLevelWindow(true);
if (parent) {
parent->Show(true);
}
}
}
}
return 0;
case WM_GETICON:
return (LRESULT)mIcon;
case WM_SYSCOMMAND:
// Send activation events to the top level window and select the proper
// tab through the controller.
if (wParam == SC_RESTORE || wParam == SC_MAXIMIZE) {
bool activateWindow;
nsresult rv = mController->OnActivate(&activateWindow);
if (NS_SUCCEEDED(rv) && activateWindow) {
// Note, restoring an iconic, maximized window here will only
// activate the maximized window. This is not a bug, it's default
// windows behavior.
::SendMessageW(mWnd, WM_SYSCOMMAND, wParam, lParam);
}
return 0;
}
// Forward everything else to the top level window. Do not forward
// close since that's intended for the tab. When the preview proxy
// closes, we'll close the tab above.
return wParam == SC_CLOSE
? ::DefWindowProcW(mProxyWindow, WM_SYSCOMMAND, wParam, lParam)
: ::SendMessageW(mWnd, WM_SYSCOMMAND, wParam, lParam);
}
return TaskbarPreview::WndProc(nMsg, wParam, lParam);
}
/* static */
LRESULT CALLBACK TaskbarTabPreview::GlobalWndProc(HWND hWnd, UINT nMsg,
WPARAM wParam,
LPARAM lParam) {
TaskbarTabPreview* preview(nullptr);
if (nMsg == WM_CREATE) {
CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lParam);
preview = reinterpret_cast<TaskbarTabPreview*>(cs->lpCreateParams);
if (!::SetPropW(hWnd, TASKBARPREVIEW_HWNDID, preview))
NS_ERROR("Could not associate native window with tab preview");
preview->mProxyWindow = hWnd;
} else {
preview = reinterpret_cast<TaskbarTabPreview*>(
::GetPropW(hWnd, TASKBARPREVIEW_HWNDID));
if (nMsg == WM_DESTROY) ::RemovePropW(hWnd, TASKBARPREVIEW_HWNDID);
}
if (preview) return preview->WndProc(nMsg, wParam, lParam);
return ::DefWindowProcW(hWnd, nMsg, wParam, lParam);
}
nsresult TaskbarTabPreview::Enable() {
WNDCLASSW wc;
HINSTANCE module = GetModuleHandle(nullptr);
if (!GetClassInfoW(module, kWindowClass, &wc)) {
wc.style = 0;
wc.lpfnWndProc = GlobalWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = module;
wc.hIcon = nullptr;
wc.hCursor = nullptr;
wc.hbrBackground = (HBRUSH) nullptr;
wc.lpszMenuName = (LPCWSTR) nullptr;
wc.lpszClassName = kWindowClass;
RegisterClassW(&wc);
}
::CreateWindowW(kWindowClass, L"TaskbarPreviewWindow",
WS_CAPTION | WS_SYSMENU, 0, 0, 200, 60, nullptr, nullptr,
module, this);
// GlobalWndProc will set mProxyWindow so that WM_CREATE can have a valid HWND
if (!mProxyWindow) return NS_ERROR_INVALID_ARG;
UpdateProxyWindowStyle();
nsresult rv = TaskbarPreview::Enable();
nsresult rvUpdate;
rvUpdate = UpdateTitle();
if (NS_FAILED(rvUpdate)) rv = rvUpdate;
rvUpdate = UpdateIcon();
if (NS_FAILED(rvUpdate)) rv = rvUpdate;
return rv;
}
nsresult TaskbarTabPreview::Disable() {
// TaskbarPreview::Disable assumes that mWnd is valid but this method can be
// called when it is null iff the nsWindow has already been destroyed and we
// are still visible for some reason during object destruction.
if (mWnd) TaskbarPreview::Disable();
if (FAILED(mTaskbar->UnregisterTab(mProxyWindow))) return NS_ERROR_FAILURE;
mRegistered = false;
// TaskbarPreview::WndProc will set mProxyWindow to null
if (!DestroyWindow(mProxyWindow)) return NS_ERROR_FAILURE;
mProxyWindow = nullptr;
return NS_OK;
}
void TaskbarTabPreview::DetachFromNSWindow() {
(void)SetVisible(false);
if (WindowHook* hook = GetWindowHook()) {
hook->RemoveMonitor(WM_WINDOWPOSCHANGED, MainWindowHook, this);
}
TaskbarPreview::DetachFromNSWindow();
}
/* static */
bool TaskbarTabPreview::MainWindowHook(void* aContext, HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam,
LRESULT* aResult) {
if (nMsg == WM_WINDOWPOSCHANGED) {
TaskbarTabPreview* preview = reinterpret_cast<TaskbarTabPreview*>(aContext);
WINDOWPOS* pos = reinterpret_cast<WINDOWPOS*>(lParam);
if (SWP_FRAMECHANGED == (pos->flags & SWP_FRAMECHANGED))
preview->UpdateProxyWindowStyle();
} else {
MOZ_ASSERT_UNREACHABLE(
"Style changed hook fired on non-style changed "
"message");
}
return false;
}
void TaskbarTabPreview::UpdateProxyWindowStyle() {
if (!mProxyWindow) return;
DWORD minMaxMask = WS_MINIMIZE | WS_MAXIMIZE;
DWORD windowStyle = GetWindowLongW(mWnd, GWL_STYLE);
DWORD proxyStyle = GetWindowLongW(mProxyWindow, GWL_STYLE);
proxyStyle &= ~minMaxMask;
proxyStyle |= windowStyle & minMaxMask;
SetWindowLongW(mProxyWindow, GWL_STYLE, proxyStyle);
DWORD exStyle =
(WS_MAXIMIZE == (windowStyle & WS_MAXIMIZE)) ? WS_EX_TOOLWINDOW : 0;
SetWindowLongW(mProxyWindow, GWL_EXSTYLE, exStyle);
}
nsresult TaskbarTabPreview::UpdateTitle() {
NS_ASSERTION(mVisible, "UpdateTitle called on invisible preview");
if (!::SetWindowTextW(mProxyWindow, mTitle.get())) return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult TaskbarTabPreview::UpdateIcon() {
NS_ASSERTION(mVisible, "UpdateIcon called on invisible preview");
::SendMessageW(mProxyWindow, WM_SETICON, ICON_SMALL, (LPARAM)mIcon);
return NS_OK;
}
nsresult TaskbarTabPreview::UpdateNext() {
NS_ASSERTION(CanMakeTaskbarCalls() && mVisible,
"UpdateNext called on invisible tab preview");
HWND hNext = nullptr;
if (mNext) {
bool visible;
nsresult rv = mNext->GetVisible(&visible);
NS_ENSURE_SUCCESS(rv, rv);
// Can only move next to enabled previews
if (!visible) return NS_ERROR_FAILURE;
hNext = (HWND)mNext->GetHWND();
// hNext must be registered with the taskbar if the call is to succeed
mNext->EnsureRegistration();
}
if (FAILED(mTaskbar->SetTabOrder(mProxyWindow, hNext)))
return NS_ERROR_FAILURE;
return NS_OK;
}
} // namespace widget
} // namespace mozilla