| // 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/browser/dock_info.h" |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "chrome/browser/browser.h" |
| #include "chrome/browser/browser_list.h" |
| #include "chrome/browser/browser_window.h" |
| #include "chrome/browser/views/frame/browser_view.h" |
| #include "chrome/browser/views/tabs/tab.h" |
| |
| namespace { |
| |
| // BaseWindowFinder ----------------------------------------------------------- |
| |
| // Base class used to locate a window. This is intended to be used with the |
| // various win32 functions that iterate over windows. |
| // |
| // A subclass need only override ShouldStopIterating to determine when |
| // iteration should stop. |
| class BaseWindowFinder { |
| public: |
| // Creates a BaseWindowFinder with the specified set of HWNDs to ignore. |
| explicit BaseWindowFinder(const std::set<HWND>& ignore) : ignore_(ignore) {} |
| virtual ~BaseWindowFinder() {} |
| |
| protected: |
| // Returns true if iteration should stop, false if iteration should continue. |
| virtual bool ShouldStopIterating(HWND window) = 0; |
| |
| static BOOL CALLBACK WindowCallbackProc(HWND hwnd, LPARAM lParam) { |
| BaseWindowFinder* finder = reinterpret_cast<BaseWindowFinder*>(lParam); |
| if (finder->ignore_.find(hwnd) != finder->ignore_.end()) |
| return TRUE; |
| |
| return finder->ShouldStopIterating(hwnd) ? FALSE : TRUE; |
| } |
| |
| private: |
| const std::set<HWND>& ignore_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BaseWindowFinder); |
| }; |
| |
| // TopMostFinder -------------------------------------------------------------- |
| |
| // Helper class to determine if a particular point of a window is not obscured |
| // by another window. |
| class TopMostFinder : public BaseWindowFinder { |
| public: |
| // Returns true if |window| is the topmost window at the location |
| // |screen_loc|, not including the windows in |ignore|. |
| static bool IsTopMostWindowAtPoint(HWND window, |
| const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) { |
| TopMostFinder finder(window, screen_loc, ignore); |
| return finder.is_top_most_; |
| } |
| |
| virtual bool ShouldStopIterating(HWND hwnd) { |
| if (hwnd == target_) { |
| // Window is topmost, stop iterating. |
| is_top_most_ = true; |
| return true; |
| } |
| |
| if (!IsWindowVisible(hwnd)) { |
| // The window isn't visible, keep iterating. |
| return false; |
| } |
| |
| RECT r; |
| if (!GetWindowRect(hwnd, &r) || !PtInRect(&r, screen_loc_.ToPOINT())) { |
| // The window doesn't contain the point, keep iterating. |
| return false; |
| } |
| |
| // hwnd is at the point. Make sure the point is within the windows region. |
| if (GetWindowRgn(hwnd, tmp_region_.Get()) == ERROR) { |
| // There's no region on the window and the window contains the point. Stop |
| // iterating. |
| return true; |
| } |
| |
| // The region is relative to the window's rect. |
| BOOL is_point_in_region = PtInRegion(tmp_region_.Get(), |
| screen_loc_.x() - r.left, screen_loc_.y() - r.top); |
| tmp_region_ = CreateRectRgn(0, 0, 0, 0); |
| // Stop iterating if the region contains the point. |
| return !!is_point_in_region; |
| } |
| |
| private: |
| TopMostFinder(HWND window, |
| const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) |
| : BaseWindowFinder(ignore), |
| target_(window), |
| screen_loc_(screen_loc), |
| is_top_most_(false), |
| tmp_region_(CreateRectRgn(0, 0, 0, 0)) { |
| EnumWindows(WindowCallbackProc, reinterpret_cast<LPARAM>(this)); |
| } |
| |
| // The window we're looking for. |
| HWND target_; |
| |
| // Location of window to find. |
| gfx::Point screen_loc_; |
| |
| // Is target_ the top most window? This is initially false but set to true |
| // in ShouldStopIterating if target_ is passed in. |
| bool is_top_most_; |
| |
| ScopedRegion tmp_region_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TopMostFinder); |
| }; |
| |
| // WindowFinder --------------------------------------------------------------- |
| |
| // Helper class to determine if a particular point contains a window from our |
| // process. |
| class LocalProcessWindowFinder : public BaseWindowFinder { |
| public: |
| // Returns the hwnd from our process at screen_loc that is not obscured by |
| // another window. Returns NULL otherwise. |
| static HWND GetProcessWindowAtPoint(const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) { |
| LocalProcessWindowFinder finder(screen_loc, ignore); |
| if (finder.result_ && |
| TopMostFinder::IsTopMostWindowAtPoint(finder.result_, screen_loc, |
| ignore)) { |
| return finder.result_; |
| } |
| return NULL; |
| } |
| |
| protected: |
| virtual bool ShouldStopIterating(HWND hwnd) { |
| RECT r; |
| if (IsWindowVisible(hwnd) && GetWindowRect(hwnd, &r) && |
| PtInRect(&r, screen_loc_.ToPOINT())) { |
| result_ = hwnd; |
| return true; |
| } |
| return false; |
| } |
| |
| private: |
| LocalProcessWindowFinder(const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) |
| : BaseWindowFinder(ignore), |
| screen_loc_(screen_loc), |
| result_(NULL) { |
| EnumThreadWindows(GetCurrentThreadId(), WindowCallbackProc, |
| reinterpret_cast<LPARAM>(this)); |
| } |
| |
| // Position of the mouse. |
| gfx::Point screen_loc_; |
| |
| // The resulting window. This is initially null but set to true in |
| // ShouldStopIterating if an appropriate window is found. |
| HWND result_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LocalProcessWindowFinder); |
| }; |
| |
| // DockToWindowFinder --------------------------------------------------------- |
| |
| // Helper class for creating a DockInfo from a specified point. |
| class DockToWindowFinder : public BaseWindowFinder { |
| public: |
| // Returns the DockInfo for the specified point. If there is no docking |
| // position for the specified point the returned DockInfo has a type of NONE. |
| static DockInfo GetDockInfoAtPoint(const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) { |
| DockToWindowFinder finder(screen_loc, ignore); |
| if (!finder.result_.window() || |
| !TopMostFinder::IsTopMostWindowAtPoint(finder.result_.window(), |
| finder.result_.hot_spot(), |
| ignore)) { |
| finder.result_.set_type(DockInfo::NONE); |
| } |
| return finder.result_; |
| } |
| |
| protected: |
| virtual bool ShouldStopIterating(HWND hwnd) { |
| BrowserView* window = BrowserView::GetBrowserViewForNativeWindow(hwnd); |
| RECT bounds; |
| if (!window || !IsWindowVisible(hwnd) || |
| !GetWindowRect(hwnd, &bounds)) { |
| return false; |
| } |
| |
| // Check the three corners we allow docking to. We don't currently allow |
| // docking to top of window as it conflicts with docking to the tab strip. |
| if (CheckPoint(hwnd, bounds.left, (bounds.top + bounds.bottom) / 2, |
| DockInfo::LEFT_OF_WINDOW) || |
| CheckPoint(hwnd, bounds.right - 1, (bounds.top + bounds.bottom) / 2, |
| DockInfo::RIGHT_OF_WINDOW) || |
| CheckPoint(hwnd, (bounds.left + bounds.right) / 2, bounds.bottom - 1, |
| DockInfo::BOTTOM_OF_WINDOW)) { |
| return true; |
| } |
| return false; |
| } |
| |
| private: |
| DockToWindowFinder(const gfx::Point& screen_loc, |
| const std::set<HWND>& ignore) |
| : BaseWindowFinder(ignore), |
| screen_loc_(screen_loc) { |
| HMONITOR monitor = MonitorFromPoint(screen_loc.ToPOINT(), |
| MONITOR_DEFAULTTONULL); |
| MONITORINFO monitor_info = {0}; |
| monitor_info.cbSize = sizeof(MONITORINFO); |
| if (monitor && GetMonitorInfo(monitor, &monitor_info)) { |
| result_.set_monitor_bounds(gfx::Rect(monitor_info.rcWork)); |
| EnumThreadWindows(GetCurrentThreadId(), WindowCallbackProc, |
| reinterpret_cast<LPARAM>(this)); |
| } |
| } |
| |
| bool CheckPoint(HWND hwnd, int x, int y, DockInfo::Type type) { |
| bool in_enable_area; |
| if (DockInfo::IsCloseToPoint(screen_loc_, x, y, &in_enable_area)) { |
| result_.set_in_enable_area(in_enable_area); |
| result_.set_window(hwnd); |
| result_.set_type(type); |
| result_.set_hot_spot(gfx::Point(x, y)); |
| // Only show the hotspot if the monitor contains the bounds of the popup |
| // window. Otherwise we end with a weird situation where the popup window |
| // isn't completely visible. |
| return result_.monitor_bounds().Contains(result_.GetPopupRect()); |
| } |
| return false; |
| } |
| |
| // The location to look for. |
| gfx::Point screen_loc_; |
| |
| // The resulting DockInfo. |
| DockInfo result_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DockToWindowFinder); |
| }; |
| |
| } // namespace |
| |
| // DockInfo ------------------------------------------------------------------- |
| |
| // static |
| DockInfo DockInfo::GetDockInfoAtPoint(const gfx::Point& screen_point, |
| const std::set<HWND>& ignore) { |
| if (factory_) |
| return factory_->GetDockInfoAtPoint(screen_point, ignore); |
| |
| // Try docking to a window first. |
| DockInfo info = DockToWindowFinder::GetDockInfoAtPoint(screen_point, ignore); |
| if (info.type() != DockInfo::NONE) |
| return info; |
| |
| // No window relative positions. Try monitor relative positions. |
| const gfx::Rect& m_bounds = info.monitor_bounds(); |
| int mid_x = m_bounds.x() + m_bounds.width() / 2; |
| int mid_y = m_bounds.y() + m_bounds.height() / 2; |
| |
| bool result = |
| info.CheckMonitorPoint(screen_point, mid_x, m_bounds.y(), |
| DockInfo::MAXIMIZE) || |
| info.CheckMonitorPoint(screen_point, mid_x, m_bounds.bottom(), |
| DockInfo::BOTTOM_HALF) || |
| info.CheckMonitorPoint(screen_point, m_bounds.x(), mid_y, |
| DockInfo::LEFT_HALF) || |
| info.CheckMonitorPoint(screen_point, m_bounds.right(), mid_y, |
| DockInfo::RIGHT_HALF); |
| |
| return info; |
| } |
| |
| HWND DockInfo::GetLocalProcessWindowAtPoint(const gfx::Point& screen_point, |
| const std::set<HWND>& ignore) { |
| if (factory_) |
| return factory_->GetLocalProcessWindowAtPoint(screen_point, ignore); |
| return |
| LocalProcessWindowFinder::GetProcessWindowAtPoint(screen_point, ignore); |
| } |
| |
| bool DockInfo::GetWindowBounds(gfx::Rect* bounds) const { |
| RECT window_rect; |
| if (!window() || !GetWindowRect(window(), &window_rect)) |
| return false; |
| *bounds = gfx::Rect(window_rect); |
| return true; |
| } |
| |
| void DockInfo::SizeOtherWindowTo(const gfx::Rect& bounds) const { |
| if (IsZoomed(window())) { |
| // We're docking relative to another window, we need to make sure the |
| // window we're docking to isn't maximized. |
| ShowWindow(window(), SW_RESTORE | SW_SHOWNA); |
| } |
| SetWindowPos(window(), HWND_TOP, bounds.x(), bounds.y(), bounds.width(), |
| bounds.height(), SWP_NOACTIVATE | SWP_NOOWNERZORDER); |
| } |
