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Diffstat (limited to 'chrome/views/window_win.cc')
| -rw-r--r-- | chrome/views/window_win.cc | 1234 |
1 files changed, 0 insertions, 1234 deletions
diff --git a/chrome/views/window_win.cc b/chrome/views/window_win.cc deleted file mode 100644 index e2226d7..0000000 --- a/chrome/views/window_win.cc +++ /dev/null @@ -1,1234 +0,0 @@ -// 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 "chrome/views/window_win.h" - -#include <shellapi.h> - -#include "base/win_util.h" -#include "chrome/app/chrome_dll_resource.h" -#include "chrome/common/gfx/chrome_canvas.h" -#include "chrome/common/gfx/chrome_font.h" -#include "chrome/common/gfx/icon_util.h" -#include "chrome/common/gfx/path.h" -#include "chrome/common/l10n_util.h" -#include "chrome/common/notification_service.h" -#include "chrome/common/pref_service.h" -#include "chrome/common/resource_bundle.h" -#include "chrome/common/win_util.h" -#include "chrome/views/client_view.h" -#include "chrome/views/custom_frame_view.h" -#include "chrome/views/native_frame_view.h" -#include "chrome/views/non_client_view.h" -#include "chrome/views/root_view.h" -#include "chrome/views/window_delegate.h" -#include "grit/generated_resources.h" - -namespace views { - -// A scoping class that prevents a window from being able to redraw in response -// to invalidations that may occur within it for the lifetime of the object. -// -// Why would we want such a thing? Well, it turns out Windows has some -// "unorthodox" behavior when it comes to painting its non-client areas. -// Occasionally, Windows will paint portions of the default non-client area -// right over the top of the custom frame. This is not simply fixed by handling -// WM_NCPAINT/WM_PAINT, with some investigation it turns out that this -// rendering is being done *inside* the default implementation of some message -// handlers and functions: -// . WM_SETTEXT -// . WM_SETICON -// . WM_NCLBUTTONDOWN -// . EnableMenuItem, called from our WM_INITMENU handler -// The solution is to handle these messages and call DefWindowProc ourselves, -// but prevent the window from being able to update itself for the duration of -// the call. We do this with this class, which automatically calls its -// associated Window's lock and unlock functions as it is created and destroyed. -// See documentation in those methods for the technique used. -// -// IMPORTANT: Do not use this scoping object for large scopes or periods of -// time! IT WILL PREVENT THE WINDOW FROM BEING REDRAWN! (duh). -// -// I would love to hear Raymond Chen's explanation for all this. And maybe a -// list of other messages that this applies to ;-) -class WindowWin::ScopedRedrawLock { - public: - explicit ScopedRedrawLock(WindowWin* window) : window_(window) { - window_->LockUpdates(); - } - - ~ScopedRedrawLock() { - window_->UnlockUpdates(); - } - - private: - // The window having its style changed. - WindowWin* window_; -}; - -HCURSOR WindowWin::resize_cursors_[6]; - -// If the hung renderer warning doesn't fit on screen, the amount of padding to -// be left between the edge of the window and the edge of the nearest monitor, -// after the window is nudged back on screen. Pixels. -static const int kMonitorEdgePadding = 10; - -//////////////////////////////////////////////////////////////////////////////// -// WindowWin, public: - -WindowWin::~WindowWin() { -} - -// static -Window* Window::CreateChromeWindow(gfx::NativeWindow parent, - const gfx::Rect& bounds, - WindowDelegate* window_delegate) { - WindowWin* window = new WindowWin(window_delegate); - window->GetNonClientView()->SetFrameView(window->CreateFrameViewForWindow()); - window->Init(parent, bounds); - return window; -} - -gfx::Rect WindowWin::GetBounds() const { - gfx::Rect bounds; - WidgetWin::GetBounds(&bounds, true); - return bounds; -} - -void WindowWin::SetBounds(const gfx::Rect& bounds) { - SetBounds(bounds, NULL); -} - -void WindowWin::SetBounds(const gfx::Rect& bounds, - gfx::NativeWindow other_window) { - win_util::SetChildBounds(GetNativeView(), GetParent(), other_window, bounds, - kMonitorEdgePadding, 0); -} - -void WindowWin::Show(int show_state) { - ShowWindow(show_state); - // When launched from certain programs like bash and Windows Live Messenger, - // show_state is set to SW_HIDE, so we need to correct that condition. We - // don't just change show_state to SW_SHOWNORMAL because MSDN says we must - // always first call ShowWindow with the specified value from STARTUPINFO, - // otherwise all future ShowWindow calls will be ignored (!!#@@#!). Instead, - // we call ShowWindow again in this case. - if (show_state == SW_HIDE) { - show_state = SW_SHOWNORMAL; - ShowWindow(show_state); - } - - // We need to explicitly activate the window if we've been shown with a state - // that should activate, because if we're opened from a desktop shortcut while - // an existing window is already running it doesn't seem to be enough to use - // one of these flags to activate the window. - if (show_state == SW_SHOWNORMAL) - Activate(); - - SetInitialFocus(); -} - -int WindowWin::GetShowState() const { - return SW_SHOWNORMAL; -} - -void WindowWin::ExecuteSystemMenuCommand(int command) { - if (command) - SendMessage(GetNativeView(), WM_SYSCOMMAND, command, 0); -} - -// static -int Window::GetLocalizedContentsWidth(int col_resource_id) { - double chars = _wtof(l10n_util::GetString(col_resource_id).c_str()); - ResourceBundle& rb = ResourceBundle::GetSharedInstance(); - ChromeFont font = rb.GetFont(ResourceBundle::BaseFont); - int width = font.GetExpectedTextWidth(static_cast<int>(chars)); - DCHECK(width > 0); - return width; -} - -// static -int Window::GetLocalizedContentsHeight(int row_resource_id) { - double lines = _wtof(l10n_util::GetString(row_resource_id).c_str()); - ResourceBundle& rb = ResourceBundle::GetSharedInstance(); - ChromeFont font = rb.GetFont(ResourceBundle::BaseFont); - int height = static_cast<int>(font.height() * lines); - DCHECK(height > 0); - return height; -} - -// static -gfx::Size Window::GetLocalizedContentsSize(int col_resource_id, - int row_resource_id) { - return gfx::Size(GetLocalizedContentsWidth(col_resource_id), - GetLocalizedContentsHeight(row_resource_id)); -} - -//////////////////////////////////////////////////////////////////////////////// -// WindowWin, Window implementation: - -void WindowWin::Show() { - int show_state = GetShowState(); - if (saved_maximized_state_) - show_state = SW_SHOWMAXIMIZED; - Show(show_state); -} - -void WindowWin::Activate() { - if (IsMinimized()) - ::ShowWindow(GetNativeView(), SW_RESTORE); - ::SetWindowPos(GetNativeView(), HWND_TOP, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE); - SetForegroundWindow(GetNativeView()); -} - -void WindowWin::Close() { - if (window_closed_) { - // It appears we can hit this code path if you close a modal dialog then - // close the last browser before the destructor is hit, which triggers - // invoking Close again. I'm short circuiting this code path to avoid - // calling into the delegate twice, which is problematic. - return; - } - - if (non_client_view_->CanClose()) { - SaveWindowPosition(); - RestoreEnabledIfNecessary(); - WidgetWin::Close(); - // If the user activates another app after opening us, then comes back and - // closes us, we want our owner to gain activation. But only if the owner - // is visible. If we don't manually force that here, the other app will - // regain activation instead. - if (owning_hwnd_ && GetNativeView() == GetForegroundWindow() && - IsWindowVisible(owning_hwnd_)) { - SetForegroundWindow(owning_hwnd_); - } - window_closed_ = true; - } -} - -void WindowWin::Maximize() { - ExecuteSystemMenuCommand(SC_MAXIMIZE); -} - -void WindowWin::Minimize() { - ExecuteSystemMenuCommand(SC_MINIMIZE); -} - -void WindowWin::Restore() { - ExecuteSystemMenuCommand(SC_RESTORE); -} - -bool WindowWin::IsActive() const { - return is_active_; -} - -bool WindowWin::IsVisible() const { - return !!::IsWindowVisible(GetNativeView()); -} - -bool WindowWin::IsMaximized() const { - return !!::IsZoomed(GetNativeView()); -} - -bool WindowWin::IsMinimized() const { - return !!::IsIconic(GetNativeView()); -} - -void WindowWin::EnableClose(bool enable) { - // If the native frame is rendering its own close button, ask it to disable. - non_client_view_->EnableClose(enable); - - // Disable the native frame's close button regardless of whether or not the - // native frame is in use, since this also affects the system menu. - EnableMenuItem(GetSystemMenu(GetNativeView(), false), - SC_CLOSE, enable ? MF_ENABLED : MF_GRAYED); - - // Let the window know the frame changed. - SetWindowPos(NULL, 0, 0, 0, 0, - SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOCOPYBITS | - SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOREPOSITION | - SWP_NOSENDCHANGING | SWP_NOSIZE | SWP_NOZORDER); -} - -void WindowWin::DisableInactiveRendering() { - disable_inactive_rendering_ = true; - non_client_view_->DisableInactiveRendering(disable_inactive_rendering_); -} - -void WindowWin::UpdateWindowTitle() { - // If the non-client view is rendering its own title, it'll need to relayout - // now. - non_client_view_->Layout(); - - // Update the native frame's text. We do this regardless of whether or not - // the native frame is being used, since this also updates the taskbar, etc. - std::wstring window_title = window_delegate_->GetWindowTitle(); - std::wstring localized_text; - if (l10n_util::AdjustStringForLocaleDirection(window_title, &localized_text)) - window_title.assign(localized_text); - SetWindowText(GetNativeView(), window_title.c_str()); -} - -void WindowWin::UpdateWindowIcon() { - // If the non-client view is rendering its own icon, we need to tell it to - // repaint. - non_client_view_->SchedulePaint(); - - // Update the native frame's icon. We do this regardless of whether or not - // the native frame is being used, since this also updates the taskbar, etc. - SkBitmap icon = window_delegate_->GetWindowIcon(); - if (!icon.isNull()) { - HICON windows_icon = IconUtil::CreateHICONFromSkBitmap(icon); - // We need to make sure to destroy the previous icon, otherwise we'll leak - // these GDI objects until we crash! - HICON old_icon = reinterpret_cast<HICON>( - SendMessage(GetNativeView(), WM_SETICON, ICON_SMALL, - reinterpret_cast<LPARAM>(windows_icon))); - if (old_icon) - DestroyIcon(old_icon); - old_icon = reinterpret_cast<HICON>( - SendMessage(GetNativeView(), WM_SETICON, ICON_BIG, - reinterpret_cast<LPARAM>(windows_icon))); - if (old_icon) - DestroyIcon(old_icon); - } -} - -NonClientFrameView* WindowWin::CreateFrameViewForWindow() { - if (non_client_view_->UseNativeFrame()) - return new NativeFrameView(this); - return new CustomFrameView(this); -} - -void WindowWin::UpdateFrameAfterFrameChange() { - // We've either gained or lost a custom window region, so reset it now. - ResetWindowRegion(true); -} - -WindowDelegate* WindowWin::GetDelegate() const { - return window_delegate_; -} - -NonClientView* WindowWin::GetNonClientView() const { - return non_client_view_; -} - -ClientView* WindowWin::GetClientView() const { - return non_client_view_->client_view(); -} - -gfx::NativeWindow WindowWin::GetNativeWindow() const { - return GetNativeView(); -} - -//////////////////////////////////////////////////////////////////////////////// -// WindowWin, NotificationObserver implementation: - -void WindowWin::Observe(NotificationType type, - const NotificationSource& source, - const NotificationDetails& details) { - // This window is closed when the last app window is closed. - DCHECK(type == NotificationType::ALL_APPWINDOWS_CLOSED); - // Only registered as an observer when we're not an app window. - // XXX DCHECK(!IsAppWindow()); - Close(); -} - -/////////////////////////////////////////////////////////////////////////////// -// WindowWin, protected: - -WindowWin::WindowWin(WindowDelegate* window_delegate) - : WidgetWin(), - focus_on_creation_(true), - window_delegate_(window_delegate), - non_client_view_(new NonClientView(this)), - owning_hwnd_(NULL), - minimum_size_(100, 100), - is_modal_(false), - restored_enabled_(false), - is_always_on_top_(false), - window_closed_(false), - disable_inactive_rendering_(false), - is_active_(false), - lock_updates_(false), - saved_window_style_(0), - saved_maximized_state_(0), - force_hidden_(false) { - InitClass(); - DCHECK(window_delegate_); - window_delegate_->window_.reset(this); - // Initialize these values to 0 so that subclasses can override the default - // behavior before calling Init. - set_window_style(0); - set_window_ex_style(0); -} - -void WindowWin::Init(HWND parent, const gfx::Rect& bounds) { - // We need to save the parent window, since later calls to GetParent() will - // return NULL. - owning_hwnd_ = parent; - // We call this after initializing our members since our implementations of - // assorted WidgetWin functions may be called during initialization. - is_modal_ = window_delegate_->IsModal(); - if (is_modal_) - BecomeModal(); - is_always_on_top_ = window_delegate_->IsAlwaysOnTop(); - - if (window_style() == 0) - set_window_style(CalculateWindowStyle()); - if (window_ex_style() == 0) - set_window_ex_style(CalculateWindowExStyle()); - - WidgetWin::Init(parent, bounds, true); - win_util::SetWindowUserData(GetNativeView(), this); - - // Create the ClientView, add it to the NonClientView and add the - // NonClientView to the RootView. This will cause everything to be parented. - non_client_view_->set_client_view(window_delegate_->CreateClientView(this)); - WidgetWin::SetContentsView(non_client_view_); - - UpdateWindowTitle(); - - SetInitialBounds(bounds); - InitAlwaysOnTopState(); - - if (!IsAppWindow()) { - notification_registrar_.Add( - this, - NotificationType::ALL_APPWINDOWS_CLOSED, - NotificationService::AllSources()); - } - - ResetWindowRegion(false); -} - -void WindowWin::SizeWindowToDefault() { - win_util::CenterAndSizeWindow(owning_window(), GetNativeView(), - non_client_view_->GetPreferredSize().ToSIZE(), - false); -} - -void WindowWin::RunSystemMenu(const gfx::Point& point) { - // We need to reset and clean up any currently created system menu objects. - // We need to call this otherwise there's a small chance that we aren't going - // to get a system menu. We also can't take the return value of this - // function. We need to call it *again* to get a valid HMENU. - //::GetSystemMenu(GetNativeView(), TRUE); - HMENU system_menu = ::GetSystemMenu(GetNativeView(), FALSE); - int id = ::TrackPopupMenu(system_menu, - TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RETURNCMD, - point.x(), point.y(), 0, GetNativeView(), NULL); - ExecuteSystemMenuCommand(id); -} - -/////////////////////////////////////////////////////////////////////////////// -// WindowWin, WidgetWin overrides: - -void WindowWin::OnActivate(UINT action, BOOL minimized, HWND window) { - if (action == WA_INACTIVE) - SaveWindowPosition(); -} - -void WindowWin::OnActivateApp(BOOL active, DWORD thread_id) { - if (!active && thread_id != GetCurrentThreadId()) { - // Another application was activated, we should reset any state that - // disables inactive rendering now. - disable_inactive_rendering_ = false; - non_client_view_->DisableInactiveRendering(false); - // Update the native frame too, since it could be rendering the non-client - // area. - CallDefaultNCActivateHandler(FALSE); - } -} - -LRESULT WindowWin::OnAppCommand(HWND window, short app_command, WORD device, - int keystate) { - // We treat APPCOMMAND ids as an extension of our command namespace, and just - // let the delegate figure out what to do... - if (!window_delegate_->ExecuteWindowsCommand(app_command)) - return WidgetWin::OnAppCommand(window, app_command, device, keystate); - return 0; -} - -void WindowWin::OnCommand(UINT notification_code, int command_id, HWND window) { - // If the notification code is > 1 it means it is control specific and we - // should ignore it. - if (notification_code > 1 || - window_delegate_->ExecuteWindowsCommand(command_id)) { - WidgetWin::OnCommand(notification_code, command_id, window); - } -} - -void WindowWin::OnDestroy() { - non_client_view_->WindowClosing(); - RestoreEnabledIfNecessary(); - WidgetWin::OnDestroy(); -} - -namespace { -static BOOL CALLBACK SendDwmCompositionChanged(HWND window, LPARAM param) { - SendMessage(window, WM_DWMCOMPOSITIONCHANGED, 0, 0); - return TRUE; -} -} // namespace - -LRESULT WindowWin::OnDwmCompositionChanged(UINT msg, WPARAM w_param, - LPARAM l_param) { - // The window may try to paint in SetUseNativeFrame, and as a result it can - // get into a state where it is very unhappy with itself - rendering black - // behind the entire client area. This is because for some reason the - // SkPorterDuff::kClear_mode erase done in the RootView thinks the window is - // still opaque. So, to work around this we hide the window as soon as we can - // (now), saving off its placement so it can be properly restored once - // everything has settled down. - WINDOWPLACEMENT saved_window_placement; - saved_window_placement.length = sizeof(WINDOWPLACEMENT); - GetWindowPlacement(GetNativeView(), &saved_window_placement); - Hide(); - - // Important step: restore the window first, since our hiding hack doesn't - // work for maximized windows! We tell the frame not to allow itself to be - // made visible though, which removes the brief flicker. - force_hidden_ = true; - ::ShowWindow(GetNativeView(), SW_RESTORE); - force_hidden_ = false; - - // We respond to this in response to WM_DWMCOMPOSITIONCHANGED since that is - // the only thing we care about - we don't actually respond to WM_THEMECHANGED - // messages. - non_client_view_->SetUseNativeFrame(win_util::ShouldUseVistaFrame()); - - // Now that we've updated the frame, we'll want to restore our saved placement - // since the display should have settled down and we can be properly rendered. - SetWindowPlacement(GetNativeView(), &saved_window_placement); - - // WM_DWMCOMPOSITIONCHANGED is only sent to top level windows, however we want - // to notify our children too, since we can have MDI child windows who need to - // update their appearance. - EnumChildWindows(GetNativeView(), &SendDwmCompositionChanged, NULL); - return 0; -} - -void WindowWin::OnFinalMessage(HWND window) { - // Delete and NULL the delegate here once we're guaranteed to get no more - // messages. - window_delegate_->DeleteDelegate(); - window_delegate_ = NULL; - WidgetWin::OnFinalMessage(window); -} - -namespace { -static void EnableMenuItem(HMENU menu, UINT command, bool enabled) { - UINT flags = MF_BYCOMMAND | (enabled ? MF_ENABLED : MF_DISABLED | MF_GRAYED); - EnableMenuItem(menu, command, flags); -} -} // namespace - -void WindowWin::OnInitMenu(HMENU menu) { - // We only need to manually enable the system menu if we're not using a native - // frame. - if (non_client_view_->UseNativeFrame()) - WidgetWin::OnInitMenu(menu); - - bool is_minimized = IsMinimized(); - bool is_maximized = IsMaximized(); - bool is_restored = !is_minimized && !is_maximized; - - ScopedRedrawLock lock(this); - EnableMenuItem(menu, SC_RESTORE, !is_restored); - EnableMenuItem(menu, SC_MOVE, is_restored); - EnableMenuItem(menu, SC_SIZE, window_delegate_->CanResize() && is_restored); - EnableMenuItem(menu, SC_MAXIMIZE, - window_delegate_->CanMaximize() && !is_maximized); - EnableMenuItem(menu, SC_MINIMIZE, - window_delegate_->CanMaximize() && !is_minimized); -} - -void WindowWin::OnMouseLeave() { - // We only need to manually track WM_MOUSELEAVE messages between the client - // and non-client area when we're not using the native frame. - if (non_client_view_->UseNativeFrame()) { - SetMsgHandled(FALSE); - return; - } - - bool process_mouse_exited = true; - POINT pt; - if (GetCursorPos(&pt)) { - LRESULT ht_component = - ::SendMessage(GetNativeView(), WM_NCHITTEST, 0, MAKELPARAM(pt.x, pt.y)); - if (ht_component != HTNOWHERE) { - // If the mouse moved into a part of the window's non-client area, then - // don't send a mouse exited event since the mouse is still within the - // bounds of the ChromeView that's rendering the frame. Note that we do - // _NOT_ do this for windows with native frames, since in that case the - // mouse really will have left the bounds of the RootView. - process_mouse_exited = false; - } - } - - if (process_mouse_exited) - ProcessMouseExited(); -} - -LRESULT WindowWin::OnNCActivate(BOOL active) { - is_active_ = !!active; - - // If we're not using the native frame, we need to force a synchronous repaint - // otherwise we'll be left in the wrong activation state until something else - // causes a repaint later. - if (!non_client_view_->UseNativeFrame()) { - // We can get WM_NCACTIVATE before we're actually visible. If we're not - // visible, no need to paint. - if (IsWindowVisible(GetNativeView())) { - non_client_view_->SchedulePaint(); - // We need to force a paint now, as a user dragging a window will block - // painting operations while the move is in progress. - PaintNow(root_view_->GetScheduledPaintRect()); - } - } - - // If we're active again, we should be allowed to render as inactive, so - // tell the non-client view. This must be done independently of the check for - // disable_inactive_rendering_ since that check is valid even if the frame - // is not active, but this can only be done if we've become active. - if (IsActive()) - non_client_view_->DisableInactiveRendering(false); - - // Reset the disable inactive rendering state since activation has changed. - if (disable_inactive_rendering_) { - disable_inactive_rendering_ = false; - return CallDefaultNCActivateHandler(TRUE); - } - return CallDefaultNCActivateHandler(active); -} - -LRESULT WindowWin::OnNCCalcSize(BOOL mode, LPARAM l_param) { - // We only need to adjust the client size/paint handling when we're not using - // the native frame. - if (non_client_view_->UseNativeFrame()) - return WidgetWin::OnNCCalcSize(mode, l_param); - - RECT* client_rect = mode ? - &reinterpret_cast<NCCALCSIZE_PARAMS*>(l_param)->rgrc[0] : - reinterpret_cast<RECT*>(l_param); - if (IsMaximized()) { - // Make the maximized mode client rect fit the screen exactly, by - // subtracting the border Windows automatically adds for maximized mode. - int border_thickness = GetSystemMetrics(SM_CXSIZEFRAME); - InflateRect(client_rect, -border_thickness, -border_thickness); - - // Find all auto-hide taskbars along the screen edges and adjust in by the - // thickness of the auto-hide taskbar on each such edge, so the window isn't - // treated as a "fullscreen app", which would cause the taskbars to - // disappear. - HMONITOR monitor = MonitorFromWindow(GetNativeView(), - MONITOR_DEFAULTTONEAREST); - if (win_util::EdgeHasAutoHideTaskbar(ABE_LEFT, monitor)) - client_rect->left += win_util::kAutoHideTaskbarThicknessPx; - if (win_util::EdgeHasAutoHideTaskbar(ABE_TOP, monitor)) - client_rect->top += win_util::kAutoHideTaskbarThicknessPx; - if (win_util::EdgeHasAutoHideTaskbar(ABE_RIGHT, monitor)) - client_rect->right -= win_util::kAutoHideTaskbarThicknessPx; - if (win_util::EdgeHasAutoHideTaskbar(ABE_BOTTOM, monitor)) - client_rect->bottom -= win_util::kAutoHideTaskbarThicknessPx; - - // We cannot return WVR_REDRAW when there is nonclient area, or Windows - // exhibits bugs where client pixels and child HWNDs are mispositioned by - // the width/height of the upper-left nonclient area. - return 0; - } - - // If the window bounds change, we're going to relayout and repaint anyway. - // Returning WVR_REDRAW avoids an extra paint before that of the old client - // pixels in the (now wrong) location, and thus makes actions like resizing a - // window from the left edge look slightly less broken. - return mode ? WVR_REDRAW : 0; -} - -LRESULT WindowWin::OnNCHitTest(const CPoint& point) { - // First, give the NonClientView a chance to test the point to see if it - // provides any of the non-client area. - CPoint temp = point; - MapWindowPoints(HWND_DESKTOP, GetNativeView(), &temp, 1); - int component = non_client_view_->NonClientHitTest(gfx::Point(temp)); - if (component != HTNOWHERE) - return component; - - // Otherwise, we let Windows do all the native frame non-client handling for - // us. - return WidgetWin::OnNCHitTest(point); -} - -namespace { -struct ClipState { - // The window being painted. - HWND parent; - - // DC painting to. - HDC dc; - - // Origin of the window in terms of the screen. - int x; - int y; -}; - -// See comments in OnNCPaint for details of this function. -static BOOL CALLBACK ClipDCToChild(HWND window, LPARAM param) { - ClipState* clip_state = reinterpret_cast<ClipState*>(param); - if (GetParent(window) == clip_state->parent && IsWindowVisible(window)) { - RECT bounds; - GetWindowRect(window, &bounds); - ExcludeClipRect(clip_state->dc, - bounds.left - clip_state->x, - bounds.top - clip_state->y, - bounds.right - clip_state->x, - bounds.bottom - clip_state->y); - } - return TRUE; -} -} // namespace - -void WindowWin::OnNCPaint(HRGN rgn) { - // We only do non-client painting if we're not using the native frame. - if (non_client_view_->UseNativeFrame()) { - WidgetWin::OnNCPaint(rgn); - return; - } - - // We have an NC region and need to paint it. We expand the NC region to - // include the dirty region of the root view. This is done to minimize - // paints. - CRect window_rect; - GetWindowRect(&window_rect); - - if (window_rect.Width() != root_view_->width() || - window_rect.Height() != root_view_->height()) { - // If the size of the window differs from the size of the root view it - // means we're being asked to paint before we've gotten a WM_SIZE. This can - // happen when the user is interactively resizing the window. To avoid - // mass flickering we don't do anything here. Once we get the WM_SIZE we'll - // reset the region of the window which triggers another WM_NCPAINT and - // all is well. - return; - } - - CRect dirty_region; - // A value of 1 indicates paint all. - if (!rgn || rgn == reinterpret_cast<HRGN>(1)) { - dirty_region = CRect(0, 0, window_rect.Width(), window_rect.Height()); - } else { - RECT rgn_bounding_box; - GetRgnBox(rgn, &rgn_bounding_box); - if (!IntersectRect(&dirty_region, &rgn_bounding_box, &window_rect)) - return; // Dirty region doesn't intersect window bounds, bale. - - // rgn_bounding_box is in screen coordinates. Map it to window coordinates. - OffsetRect(&dirty_region, -window_rect.left, -window_rect.top); - } - - // In theory GetDCEx should do what we want, but I couldn't get it to work. - // In particular the docs mentiond DCX_CLIPCHILDREN, but as far as I can tell - // it doesn't work at all. So, instead we get the DC for the window then - // manually clip out the children. - HDC dc = GetWindowDC(GetNativeView()); - ClipState clip_state; - clip_state.x = window_rect.left; - clip_state.y = window_rect.top; - clip_state.parent = GetNativeView(); - clip_state.dc = dc; - EnumChildWindows(GetNativeView(), &ClipDCToChild, - reinterpret_cast<LPARAM>(&clip_state)); - - RootView* root_view = GetRootView(); - CRect old_paint_region = root_view->GetScheduledPaintRectConstrainedToSize(); - - if (!old_paint_region.IsRectEmpty()) { - // The root view has a region that needs to be painted. Include it in the - // region we're going to paint. - - CRect tmp = dirty_region; - UnionRect(&dirty_region, &tmp, &old_paint_region); - } - - root_view->SchedulePaint(gfx::Rect(dirty_region), false); - - // ChromeCanvasPaints destructor does the actual painting. As such, wrap the - // following in a block to force paint to occur so that we can release the dc. - { - ChromeCanvasPaint canvas(dc, opaque(), dirty_region.left, dirty_region.top, - dirty_region.Width(), dirty_region.Height()); - - root_view->ProcessPaint(&canvas); - } - - ReleaseDC(GetNativeView(), dc); -} - -void WindowWin::OnNCLButtonDown(UINT ht_component, const CPoint& point) { - // When we're using a native frame, window controls work without us - // interfering. - if (!non_client_view_->UseNativeFrame()) { - switch (ht_component) { - case HTCLOSE: - case HTMINBUTTON: - case HTMAXBUTTON: { - // When the mouse is pressed down in these specific non-client areas, - // we need to tell the RootView to send the mouse pressed event (which - // sets capture, allowing subsequent WM_LBUTTONUP (note, _not_ - // WM_NCLBUTTONUP) to fire so that the appropriate WM_SYSCOMMAND can be - // sent by the applicable button's ButtonListener. We _have_ to do this - // way rather than letting Windows just send the syscommand itself (as - // would happen if we never did this dance) because for some insane - // reason DefWindowProc for WM_NCLBUTTONDOWN also renders the pressed - // window control button appearance, in the Windows classic style, over - // our view! Ick! By handling this message we prevent Windows from - // doing this undesirable thing, but that means we need to roll the - // sys-command handling ourselves. - ProcessNCMousePress(point, MK_LBUTTON); - return; - } - } - } - - // TODO(beng): figure out why we need to run the system menu manually - // ourselves. This is wrong and causes many subtle bugs. - // From my initial research, it looks like DefWindowProc tries - // to run it but fails before sending the initial WM_MENUSELECT - // for the sysmenu. - if (ht_component == HTSYSMENU) - RunSystemMenu(non_client_view_->GetSystemMenuPoint()); - else - WidgetWin::OnNCLButtonDown(ht_component, point); - - /* TODO(beng): Fix the standard non-client over-painting bug. This code - doesn't work but identifies the problem. - if (!IsMsgHandled()) { - // WindowWin::OnNCLButtonDown set the message as unhandled. This normally - // means WidgetWin::ProcessWindowMessage will pass it to - // DefWindowProc. Sadly, DefWindowProc for WM_NCLBUTTONDOWN does weird - // non-client painting, so we need to call it directly here inside a - // scoped update lock. - ScopedRedrawLock lock(this); - DefWindowProc(GetNativeView(), WM_NCLBUTTONDOWN, ht_component, - MAKELPARAM(point.x, point.y)); - SetMsgHandled(TRUE); - } - */ -} - -void WindowWin::OnNCRButtonDown(UINT ht_component, const CPoint& point) { - if (ht_component == HTCAPTION || ht_component == HTSYSMENU) - RunSystemMenu(gfx::Point(point)); - else - WidgetWin::OnNCRButtonDown(ht_component, point); -} - -LRESULT WindowWin::OnNCUAHDrawCaption(UINT msg, WPARAM w_param, - LPARAM l_param) { - // See comment in widget_win.h at the definition of WM_NCUAHDRAWCAPTION for - // an explanation about why we need to handle this message. - SetMsgHandled(!non_client_view_->UseNativeFrame()); - return 0; -} - -LRESULT WindowWin::OnNCUAHDrawFrame(UINT msg, WPARAM w_param, - LPARAM l_param) { - // See comment in widget_win.h at the definition of WM_NCUAHDRAWCAPTION for - // an explanation about why we need to handle this message. - SetMsgHandled(!non_client_view_->UseNativeFrame()); - return 0; -} - -LRESULT WindowWin::OnSetCursor(HWND window, UINT hittest_code, UINT message) { - // If the window is disabled, it's because we're showing a modal dialog box. - // We need to let DefWindowProc handle the message. That's because - // DefWindowProc for WM_SETCURSOR with message = some kind of mouse button - // down message sends the top level window a WM_ACTIVATEAPP message, which we - // otherwise wouldn't get. The symptom of not doing this is that if the user - // has a window in the background with a modal dialog open, they can't click - // on the disabled background window to bring the entire stack to the front. - // This is annoying because they then have to move all the foreground windows - // out of the way to be able to activate said window. I love how on Windows, - // the answer isn't always logical. - if (!IsWindowEnabled(GetNativeView())) - return WidgetWin::OnSetCursor(window, hittest_code, message); - - int index = RC_NORMAL; - switch (hittest_code) { - case HTTOP: - case HTBOTTOM: - index = RC_VERTICAL; - break; - case HTTOPLEFT: - case HTBOTTOMRIGHT: - index = RC_NWSE; - break; - case HTTOPRIGHT: - case HTBOTTOMLEFT: - index = RC_NESW; - break; - case HTLEFT: - case HTRIGHT: - index = RC_HORIZONTAL; - break; - case HTCAPTION: - case HTCLIENT: - index = RC_NORMAL; - break; - } - SetCursor(resize_cursors_[index]); - return 0; -} - -LRESULT WindowWin::OnSetIcon(UINT size_type, HICON new_icon) { - // This shouldn't hurt even if we're using the native frame. - ScopedRedrawLock lock(this); - return DefWindowProc(GetNativeView(), WM_SETICON, size_type, - reinterpret_cast<LPARAM>(new_icon)); -} - -LRESULT WindowWin::OnSetText(const wchar_t* text) { - // This shouldn't hurt even if we're using the native frame. - ScopedRedrawLock lock(this); - return DefWindowProc(GetNativeView(), WM_SETTEXT, NULL, - reinterpret_cast<LPARAM>(text)); -} - -void WindowWin::OnSize(UINT size_param, const CSize& new_size) { - // Don't no-op if the new_size matches current size. If our normal bounds - // and maximized bounds are the same, then we need to layout (because we - // layout differently when maximized). - SaveWindowPosition(); - ChangeSize(size_param, new_size); - RedrawWindow(GetNativeView(), NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN); - - // ResetWindowRegion is going to trigger WM_NCPAINT. By doing it after we've - // invoked OnSize we ensure the RootView has been laid out. - ResetWindowRegion(false); -} - -void WindowWin::OnSysCommand(UINT notification_code, CPoint click) { - if (!non_client_view_->UseNativeFrame()) { - // Windows uses the 4 lower order bits of |notification_code| for type- - // specific information so we must exclude this when comparing. - static const int sc_mask = 0xFFF0; - if ((notification_code & sc_mask) == SC_MINIMIZE || - (notification_code & sc_mask) == SC_MAXIMIZE || - (notification_code & sc_mask) == SC_RESTORE) { - non_client_view_->ResetWindowControls(); - } else if ((notification_code & sc_mask) == SC_MOVE || - (notification_code & sc_mask) == SC_SIZE) { - if (lock_updates_) { - // We were locked, before entering a resize or move modal loop. Now that - // we've begun to move the window, we need to unlock updates so that the - // sizing/moving feedback can be continuous. - UnlockUpdates(); - } - } - } - - // First see if the delegate can handle it. - if (window_delegate_->ExecuteWindowsCommand(notification_code)) - return; - - if (notification_code == IDC_ALWAYS_ON_TOP) { - is_always_on_top_ = !is_always_on_top_; - - // Change the menu check state. - HMENU system_menu = GetSystemMenu(GetNativeView(), FALSE); - MENUITEMINFO menu_info; - memset(&menu_info, 0, sizeof(MENUITEMINFO)); - menu_info.cbSize = sizeof(MENUITEMINFO); - BOOL r = GetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP, - FALSE, &menu_info); - DCHECK(r); - menu_info.fMask = MIIM_STATE; - if (is_always_on_top_) - menu_info.fState = MFS_CHECKED; - r = SetMenuItemInfo(system_menu, IDC_ALWAYS_ON_TOP, FALSE, &menu_info); - - // Now change the actual window's behavior. - AlwaysOnTopChanged(); - } else if ((notification_code == SC_KEYMENU) && (click.x == VK_SPACE)) { - // Run the system menu at the NonClientView's desired location. - RunSystemMenu(non_client_view_->GetSystemMenuPoint()); - } else { - // Use the default implementation for any other command. - DefWindowProc(GetNativeView(), WM_SYSCOMMAND, notification_code, - MAKELPARAM(click.y, click.x)); - } -} - -void WindowWin::OnWindowPosChanging(WINDOWPOS* window_pos) { - if (force_hidden_) { - // Prevent the window from being made visible if we've been asked to do so. - // See comment in header as to why we might want this. - window_pos->flags &= ~SWP_SHOWWINDOW; - } - WidgetWin::OnWindowPosChanging(window_pos); -} - -//////////////////////////////////////////////////////////////////////////////// -// WindowWin, private: - -void WindowWin::BecomeModal() { - // We implement modality by crawling up the hierarchy of windows starting - // at the owner, disabling all of them so that they don't receive input - // messages. - DCHECK(owning_hwnd_) << "Can't create a modal dialog without an owner"; - HWND start = owning_hwnd_; - while (start != NULL) { - ::EnableWindow(start, FALSE); - start = ::GetParent(start); - } -} - -void WindowWin::SetInitialFocus() { - if (!focus_on_creation_) - return; - - View* v = window_delegate_->GetInitiallyFocusedView(); - if (v) { - v->RequestFocus(); - } else { - // The window does not get keyboard messages unless we focus it, not sure - // why. - SetFocus(GetNativeView()); - } -} - -void WindowWin::SetInitialBounds(const gfx::Rect& create_bounds) { - // First we obtain the window's saved show-style and store it. We need to do - // this here, rather than in Show() because by the time Show() is called, - // the window's size will have been reset (below) and the saved maximized - // state will have been lost. Sadly there's no way to tell on Windows when - // a window is restored from maximized state, so we can't more accurately - // track maximized state independently of sizing information. - window_delegate_->GetSavedMaximizedState(&saved_maximized_state_); - - // Restore the window's placement from the controller. - gfx::Rect saved_bounds(create_bounds.ToRECT()); - if (window_delegate_->GetSavedWindowBounds(&saved_bounds)) { - // Make sure the bounds are at least the minimum size. - if (saved_bounds.width() < minimum_size_.cx) { - saved_bounds.SetRect(saved_bounds.x(), saved_bounds.y(), - saved_bounds.right() + minimum_size_.cx - - saved_bounds.width(), - saved_bounds.bottom()); - } - - if (saved_bounds.height() < minimum_size_.cy) { - saved_bounds.SetRect(saved_bounds.x(), saved_bounds.y(), - saved_bounds.right(), - saved_bounds.bottom() + minimum_size_.cy - - saved_bounds.height()); - } - - // "Show state" (maximized, minimized, etc) is handled by Show(). - // Don't use SetBounds here. SetBounds constrains to the size of the - // monitor, but we don't want that when creating a new window as the result - // of dragging out a tab to create a new window. - SetWindowPos(NULL, saved_bounds.x(), saved_bounds.y(), - saved_bounds.width(), saved_bounds.height(), 0); - } else { - if (create_bounds.IsEmpty()) { - // No initial bounds supplied, so size the window to its content and - // center over its parent. - SizeWindowToDefault(); - } else { - // Use the supplied initial bounds. - SetBounds(create_bounds); - } - } -} - -void WindowWin::InitAlwaysOnTopState() { - is_always_on_top_ = false; - if (window_delegate_->GetSavedAlwaysOnTopState(&is_always_on_top_) && - is_always_on_top_ != window_delegate_->IsAlwaysOnTop()) { - AlwaysOnTopChanged(); - } - - if (window_delegate_->HasAlwaysOnTopMenu()) - AddAlwaysOnTopSystemMenuItem(); -} - -void WindowWin::AddAlwaysOnTopSystemMenuItem() { - // The Win32 API requires that we own the text. - always_on_top_menu_text_ = l10n_util::GetString(IDS_ALWAYS_ON_TOP); - - // Let's insert a menu to the window. - HMENU system_menu = ::GetSystemMenu(GetNativeView(), FALSE); - int index = ::GetMenuItemCount(system_menu) - 1; - if (index < 0) { - // Paranoia check. - NOTREACHED(); - index = 0; - } - // First we add the separator. - MENUITEMINFO menu_info; - memset(&menu_info, 0, sizeof(MENUITEMINFO)); - menu_info.cbSize = sizeof(MENUITEMINFO); - menu_info.fMask = MIIM_FTYPE; - menu_info.fType = MFT_SEPARATOR; - ::InsertMenuItem(system_menu, index, TRUE, &menu_info); - - // Then the actual menu. - menu_info.fMask = MIIM_FTYPE | MIIM_ID | MIIM_STRING | MIIM_STATE; - menu_info.fType = MFT_STRING; - menu_info.fState = MFS_ENABLED; - if (is_always_on_top_) - menu_info.fState |= MFS_CHECKED; - menu_info.wID = IDC_ALWAYS_ON_TOP; - menu_info.dwTypeData = const_cast<wchar_t*>(always_on_top_menu_text_.c_str()); - ::InsertMenuItem(system_menu, index, TRUE, &menu_info); -} - -void WindowWin::RestoreEnabledIfNecessary() { - if (is_modal_ && !restored_enabled_) { - restored_enabled_ = true; - // If we were run modally, we need to undo the disabled-ness we inflicted on - // the owner's parent hierarchy. - HWND start = owning_hwnd_; - while (start != NULL) { - ::EnableWindow(start, TRUE); - start = ::GetParent(start); - } - } -} - -void WindowWin::AlwaysOnTopChanged() { - ::SetWindowPos(GetNativeView(), - is_always_on_top_ ? HWND_TOPMOST : HWND_NOTOPMOST, - 0, 0, 0, 0, - SWP_NOMOVE | SWP_NOSIZE | SWP_FRAMECHANGED); -} - -DWORD WindowWin::CalculateWindowStyle() { - DWORD window_styles = - WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_SYSMENU | WS_CAPTION; - bool can_resize = window_delegate_->CanResize(); - bool can_maximize = window_delegate_->CanMaximize(); - if (can_maximize) { - window_styles |= WS_OVERLAPPEDWINDOW; - } else if (can_resize) { - window_styles |= WS_OVERLAPPED | WS_THICKFRAME; - } - if (window_delegate_->AsDialogDelegate()) { - window_styles |= DS_MODALFRAME; - // NOTE: Turning this off means we lose the close button, which is bad. - // Turning it on though means the user can maximize or size the window - // from the system menu, which is worse. We may need to provide our own - // menu to get the close button to appear properly. - // window_styles &= ~WS_SYSMENU; - } - return window_styles; -} - -DWORD WindowWin::CalculateWindowExStyle() { - DWORD window_ex_styles = 0; - if (window_delegate_->AsDialogDelegate()) - window_ex_styles |= WS_EX_DLGMODALFRAME; - if (window_delegate_->IsAlwaysOnTop()) - window_ex_styles |= WS_EX_TOPMOST; - return window_ex_styles; -} - -void WindowWin::SaveWindowPosition() { - // The window delegate does the actual saving for us. It seems like (judging - // by go/crash) that in some circumstances we can end up here after - // WM_DESTROY, at which point the window delegate is likely gone. So just - // bail. - if (!window_delegate_) - return; - - WINDOWPLACEMENT win_placement = { 0 }; - win_placement.length = sizeof(WINDOWPLACEMENT); - - BOOL r = GetWindowPlacement(GetNativeView(), &win_placement); - DCHECK(r); - - bool maximized = (win_placement.showCmd == SW_SHOWMAXIMIZED); - CRect window_bounds(win_placement.rcNormalPosition); - window_delegate_->SaveWindowPlacement( - gfx::Rect(win_placement.rcNormalPosition), maximized, is_always_on_top_); -} - -void WindowWin::LockUpdates() { - lock_updates_ = true; - saved_window_style_ = GetWindowLong(GetNativeView(), GWL_STYLE); - SetWindowLong(GetNativeView(), GWL_STYLE, saved_window_style_ & ~WS_VISIBLE); -} - -void WindowWin::UnlockUpdates() { - SetWindowLong(GetNativeView(), GWL_STYLE, saved_window_style_); - lock_updates_ = false; -} - -void WindowWin::ResetWindowRegion(bool force) { - // A native frame uses the native window region, and we don't want to mess - // with it. - if (non_client_view_->UseNativeFrame()) { - if (force) - SetWindowRgn(NULL, TRUE); - return; - } - - // Changing the window region is going to force a paint. Only change the - // window region if the region really differs. - HRGN current_rgn = CreateRectRgn(0, 0, 0, 0); - int current_rgn_result = GetWindowRgn(GetNativeView(), current_rgn); - - CRect window_rect; - GetWindowRect(&window_rect); - HRGN new_region; - gfx::Path window_mask; - non_client_view_->GetWindowMask( - gfx::Size(window_rect.Width(), window_rect.Height()), &window_mask); - new_region = window_mask.CreateHRGN(); - - if (current_rgn_result == ERROR || !EqualRgn(current_rgn, new_region)) { - // SetWindowRgn takes ownership of the HRGN created by CreateHRGN. - SetWindowRgn(new_region, TRUE); - } else { - DeleteObject(new_region); - } - - DeleteObject(current_rgn); -} - -void WindowWin::ProcessNCMousePress(const CPoint& point, int flags) { - CPoint temp = point; - MapWindowPoints(HWND_DESKTOP, GetNativeView(), &temp, 1); - UINT message_flags = 0; - if ((GetKeyState(VK_CONTROL) & 0x80) == 0x80) - message_flags |= MK_CONTROL; - if ((GetKeyState(VK_SHIFT) & 0x80) == 0x80) - message_flags |= MK_SHIFT; - message_flags |= flags; - ProcessMousePressed(temp, message_flags, false); -} - -LRESULT WindowWin::CallDefaultNCActivateHandler(BOOL active) { - // The DefWindowProc handling for WM_NCACTIVATE renders the classic-look - // window title bar directly, so we need to use a redraw lock here to prevent - // it from doing so. - ScopedRedrawLock lock(this); - return DefWindowProc(GetNativeView(), WM_NCACTIVATE, active, 0); -} - -void WindowWin::InitClass() { - static bool initialized = false; - if (!initialized) { - resize_cursors_[RC_NORMAL] = LoadCursor(NULL, IDC_ARROW); - resize_cursors_[RC_VERTICAL] = LoadCursor(NULL, IDC_SIZENS); - resize_cursors_[RC_HORIZONTAL] = LoadCursor(NULL, IDC_SIZEWE); - resize_cursors_[RC_NESW] = LoadCursor(NULL, IDC_SIZENESW); - resize_cursors_[RC_NWSE] = LoadCursor(NULL, IDC_SIZENWSE); - initialized = true; - } -} - -} // namespace views |