1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/ui/tabs/tab_resources.h" 6 7 #include "base/logging.h" 8 #include "ui/gfx/path.h" 9 10 namespace { 11 12 // Hit mask constants. 13 const SkScalar kTabCapWidth = 15; 14 const SkScalar kTabTopCurveWidth = 4; 15 const SkScalar kTabBottomCurveWidth = 3; 16 #if defined(TOOLKIT_VIEWS) 17 // Windows and Ash have shadows in the left, right and top parts of the tab. 18 const SkScalar kTabInset = 6; 19 const SkScalar kTabTop = 2; 20 #else 21 // Linux GTK and Mac don't have the shadows. 22 const SkScalar kTabInset = 0; 23 const SkScalar kTabTop = 0; 24 #endif 25 26 } // namespace 27 28 // static 29 void TabResources::GetHitTestMask(int width, 30 int height, 31 bool include_top_shadow, 32 gfx::Path* path) { 33 DCHECK(path); 34 35 SkScalar left = kTabInset; 36 SkScalar top = kTabTop; 37 SkScalar right = SkIntToScalar(width) - kTabInset; 38 SkScalar bottom = SkIntToScalar(height); 39 40 // Start in the lower-left corner. 41 path->moveTo(left, bottom); 42 43 // Left end cap. 44 path->lineTo(left + kTabBottomCurveWidth, bottom - kTabBottomCurveWidth); 45 path->lineTo(left + kTabCapWidth - kTabTopCurveWidth, 46 top + kTabTopCurveWidth); 47 path->lineTo(left + kTabCapWidth, top); 48 49 // Extend over the top shadow area if we have one and the caller wants it. 50 if (kTabTop > 0 && include_top_shadow) { 51 path->lineTo(left + kTabCapWidth, 0); 52 path->lineTo(right - kTabCapWidth, 0); 53 } 54 55 // Connect to the right cap. 56 path->lineTo(right - kTabCapWidth, top); 57 58 // Right end cap. 59 path->lineTo(right - kTabCapWidth + kTabTopCurveWidth, 60 top + kTabTopCurveWidth); 61 path->lineTo(right - kTabBottomCurveWidth, bottom - kTabBottomCurveWidth); 62 path->lineTo(right, bottom); 63 64 // Close out the path. 65 path->lineTo(left, bottom); 66 path->close(); 67 } 68
