Gets find bar animation/clipping to work on views/gtk.

chrome/browser/views/find_bar_host_win.cc

 // Copyright (c) 2006-2009 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/views/find_bar_host.h"
 
 #include "chrome/browser/find_bar_controller.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/browser/views/frame/browser_view.h"
 #include "views/controls/scrollbar/native_scroll_bar.h"
 #include "views/widget/widget_win.h"
 
-// TODO(brettw) this should not be so complicated. The view should really be in
-// charge of these regions. CustomFrameWindow will do this for us. It will also
-// let us set a path for the window region which will avoid some logic here.
-void FindBarHost::UpdateWindowEdges(const gfx::Rect& new_pos) {
-  // |w| is used to make it easier to create the part of the polygon that curves
-  // the right side of the Find window. It essentially keeps track of the
-  // x-pixel position of the right-most background image inside the view.
-  // TODO(finnur): Let the view tell us how to draw the curves or convert
-  // this to a CustomFrameWindow.
-  int w = new_pos.width() - 6;  // -6 positions us at the left edge of the
-                                // rightmost background image of the view.
-
-  // This polygon array represents the outline of the background image for the
-  // dialog. Basically, it encompasses only the visible pixels of the
-  // concatenated find_dlg_LMR_bg images (where LMR = [left | middle | right]).
-  static const POINT polygon[] = {
-      {0, 0}, {0, 1}, {2, 3}, {2, 29}, {4, 31},
-        {4, 32}, {w+0, 32},
-      {w+0, 31}, {w+1, 31}, {w+3, 29}, {w+3, 3}, {w+6, 0}
-  };
-
-  // Find the largest x and y value in the polygon.
-  int max_x = 0, max_y = 0;
-  for (int i = 0; i < arraysize(polygon); i++) {
-    max_x = std::max(max_x, static_cast<int>(polygon[i].x));
-    max_y = std::max(max_y, static_cast<int>(polygon[i].y));
-  }
-
-  // We then create the polygon and use SetWindowRgn to force the window to draw
-  // only within that area. This region may get reduced in size below.
-  HRGN region = CreatePolygonRgn(polygon, arraysize(polygon), ALTERNATE);
-
-  // Are we animating?
-  if (find_dialog_animation_offset_ > 0) {
-    // The animation happens in two steps: First, we clip the window and then in
-    // GetDialogPosition we offset the window position so that it still looks
-    // attached to the toolbar as it grows. We clip the window by creating a
-    // rectangle region (that gradually increases as the animation progresses)
-    // and find the intersection between the two regions using CombineRgn.
-
-    // |y| shrinks as the animation progresses from the height of the view down
-    // to 0 (and reverses when closing).
-    int y = find_dialog_animation_offset_;
-    // |y| shrinking means the animation (visible) region gets larger. In other
-    // words: the rectangle grows upward (when the dialog is opening).
-    HRGN animation_region = CreateRectRgn(0, y, max_x, max_y);
-    // |region| will contain the intersected parts after calling this function:
-    CombineRgn(region, animation_region, region, RGN_AND);
-    DeleteObject(animation_region);
-
-    // Next, we need to increase the region a little bit to account for the
-    // curved edges that the view will draw to make it look like grows out of
-    // the toolbar.
-    POINT left_curve[] = {
-      {0, y+0}, {0, y+1}, {2, y+3}, {2, y+0}, {0, y+0}
-    };
-    POINT right_curve[] = {
-      {w+3, y+3}, {w+6, y+0}, {w+3, y+0}, {w+3, y+3}
-    };
-
-    // Combine the region for the curve on the left with our main region.
-    HRGN r = CreatePolygonRgn(left_curve, arraysize(left_curve), ALTERNATE);
-    CombineRgn(region, r, region, RGN_OR);
-    DeleteObject(r);
-
-    // Combine the region for the curve on the right with our main region.
-    r = CreatePolygonRgn(right_curve, arraysize(right_curve), ALTERNATE);
-    CombineRgn(region, r, region, RGN_OR);
-    DeleteObject(r);
-  }
-
-  // Now see if we need to truncate the region because parts of it obscures
-  // the main window border.
-  gfx::Rect dialog_bounds;
-  GetDialogBounds(&dialog_bounds);
-
-  // Calculate how much our current position overlaps our boundaries. If we
-  // overlap, it means we have too little space to draw the whole dialog and
-  // we allow overwriting the scrollbar before we start truncating our dialog.
-  //
-  // TODO(brettw) this constant is evil. This is the amount of room we've added
-  // to the window size, when we set the region, it can change the size.
-  static const int kAddedWidth = 7;
-  int difference = (new_pos.right() - kAddedWidth) -
-                   dialog_bounds.width() -
-                   views::NativeScrollBar::GetVerticalScrollBarWidth() +
-                   1;
-  if (difference > 0) {
-    POINT exclude[4] = {0};
-    exclude[0].x = max_x - difference;  // Top left corner.
-    exclude[0].y = 0;
-
-    exclude[1].x = max_x;               // Top right corner.
-    exclude[1].y = 0;
-
-    exclude[2].x = max_x;               // Bottom right corner.
-    exclude[2].y = max_y;
-
-    exclude[3].x = max_x - difference;  // Bottom left corner.
-    exclude[3].y = max_y;
-
-    // Subtract this region from the original region.
-    HRGN exclude_rgn = CreatePolygonRgn(exclude, arraysize(exclude), ALTERNATE);
-    int result = CombineRgn(region, region, exclude_rgn, RGN_DIFF);
-    DeleteObject(exclude_rgn);
-  }
-
-  // The system now owns the region, so we do not delete it.
-  ::SetWindowRgn(host_->GetNativeView(), region, TRUE);  // TRUE = Redraw.
-}
-
 NativeWebKeyboardEvent FindBarHost::GetKeyboardEvent(
      const TabContents* contents,
      const views::Textfield::Keystroke& key_stroke) {
   HWND hwnd = contents->GetContentNativeView();
   return NativeWebKeyboardEvent(
       hwnd, key_stroke.message(), key_stroke.key(), 0);
 }
 
 void FindBarHost::AudibleAlert() {
   MessageBeep(MB_OK);
@@ skipping 38 matching lines @@
 
 gfx::NativeView FindBarHost::GetNativeView(BrowserView* browser_view) {
   return browser_view->GetWidget()->GetNativeView();
 }
 
 bool FindBarHost::ShouldForwardKeystrokeToWebpageNative(
     const views::Textfield::Keystroke& key_stroke) {
   // We specifically ignore WM_CHAR. See http://crbug.com/10509.
   return key_stroke.message() == WM_KEYDOWN || key_stroke.message() == WM_KEYUP;
 }