| // Copyright 2018 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. |
| |
| // Copied with modifications from ash/accessibility, refactored for use in |
| // chromecast. |
| |
| #include "chromecast/graphics/accessibility/accessibility_focus_ring.h" |
| |
| #include <stddef.h> |
| |
| #include "base/logging.h" |
| |
| namespace chromecast { |
| |
| // static |
| AccessibilityFocusRing AccessibilityFocusRing::CreateWithRect( |
| const gfx::Rect& bounds, |
| int margin) { |
| // Compute the height of the top and bottom cap. |
| int cap_height = std::min(bounds.height() / 2, margin * 2); |
| |
| gfx::Rect top(bounds.x(), bounds.y(), bounds.width(), cap_height); |
| gfx::Rect bottom(bounds.x(), bounds.bottom() - cap_height, bounds.width(), |
| cap_height); |
| gfx::Rect body(bounds.x(), top.bottom(), bounds.width(), |
| bottom.y() - top.bottom()); |
| |
| return CreateWithParagraphShape(top, body, bottom, margin); |
| } |
| |
| // static |
| AccessibilityFocusRing AccessibilityFocusRing::Interpolate( |
| const AccessibilityFocusRing& r1, |
| const AccessibilityFocusRing& r2, |
| double fraction) { |
| AccessibilityFocusRing dst; |
| for (int i = 0; i < 36; ++i) { |
| dst.points[i] = gfx::Point( |
| r1.points[i].x() * (1 - fraction) + r2.points[i].x() * fraction, |
| r1.points[i].y() * (1 - fraction) + r2.points[i].y() * fraction); |
| } |
| return dst; |
| } |
| |
| // static |
| AccessibilityFocusRing AccessibilityFocusRing::CreateWithParagraphShape( |
| const gfx::Rect& orig_top_line, |
| const gfx::Rect& orig_body, |
| const gfx::Rect& orig_bottom_line, |
| int margin) { |
| gfx::Rect top = orig_top_line; |
| gfx::Rect middle = orig_body; |
| gfx::Rect bottom = orig_bottom_line; |
| |
| int min_height = std::min(top.height(), bottom.height()); |
| margin = std::min(margin, min_height / 2); |
| |
| if (top.x() <= middle.x() + 2 * margin) { |
| top.set_width(top.width() + top.x() - middle.x()); |
| top.set_x(middle.x()); |
| } |
| if (top.right() >= middle.right() - 2 * margin) { |
| top.set_width(middle.right() - top.x()); |
| } |
| |
| if (bottom.x() <= middle.x() + 2 * margin) { |
| bottom.set_width(bottom.width() + bottom.x() - middle.x()); |
| bottom.set_x(middle.x()); |
| } |
| if (bottom.right() >= middle.right() - 2 * margin) { |
| bottom.set_width(middle.right() - bottom.x()); |
| } |
| |
| AccessibilityFocusRing ring; |
| ring.points[0] = gfx::Point(top.x(), top.bottom() - margin); |
| ring.points[1] = gfx::Point(top.x(), top.y() + margin); |
| ring.points[2] = gfx::Point(top.x(), top.y()); |
| ring.points[3] = gfx::Point(top.x() + margin, top.y()); |
| ring.points[4] = gfx::Point(top.right() - margin, top.y()); |
| ring.points[5] = gfx::Point(top.right(), top.y()); |
| ring.points[6] = gfx::Point(top.right(), top.y() + margin); |
| ring.points[7] = gfx::Point(top.right(), top.bottom() - margin); |
| ring.points[8] = gfx::Point(top.right(), top.bottom()); |
| if (top.right() < middle.right()) { |
| ring.points[9] = gfx::Point(top.right() + margin, middle.y()); |
| ring.points[10] = gfx::Point(middle.right() - margin, middle.y()); |
| } else { |
| ring.points[9] = gfx::Point(top.right(), middle.y()); |
| ring.points[10] = gfx::Point(middle.right(), middle.y()); |
| } |
| ring.points[11] = gfx::Point(middle.right(), middle.y()); |
| ring.points[12] = gfx::Point(middle.right(), middle.y() + margin); |
| ring.points[13] = gfx::Point(middle.right(), middle.bottom() - margin); |
| ring.points[14] = gfx::Point(middle.right(), middle.bottom()); |
| if (bottom.right() < middle.right()) { |
| ring.points[15] = gfx::Point(middle.right() - margin, bottom.y()); |
| ring.points[16] = gfx::Point(bottom.right() + margin, bottom.y()); |
| } else { |
| ring.points[15] = gfx::Point(middle.right(), bottom.y()); |
| ring.points[16] = gfx::Point(bottom.right(), bottom.y()); |
| } |
| ring.points[17] = gfx::Point(bottom.right(), bottom.y()); |
| ring.points[18] = gfx::Point(bottom.right(), bottom.y() + margin); |
| ring.points[19] = gfx::Point(bottom.right(), bottom.bottom() - margin); |
| ring.points[20] = gfx::Point(bottom.right(), bottom.bottom()); |
| ring.points[21] = gfx::Point(bottom.right() - margin, bottom.bottom()); |
| ring.points[22] = gfx::Point(bottom.x() + margin, bottom.bottom()); |
| ring.points[23] = gfx::Point(bottom.x(), bottom.bottom()); |
| ring.points[24] = gfx::Point(bottom.x(), bottom.bottom() - margin); |
| ring.points[25] = gfx::Point(bottom.x(), bottom.y() + margin); |
| ring.points[26] = gfx::Point(bottom.x(), bottom.y()); |
| if (bottom.x() > middle.x()) { |
| ring.points[27] = gfx::Point(bottom.x() - margin, bottom.y()); |
| ring.points[28] = gfx::Point(middle.x() + margin, middle.bottom()); |
| } else { |
| ring.points[27] = gfx::Point(bottom.x(), bottom.y()); |
| ring.points[28] = gfx::Point(middle.x(), middle.bottom()); |
| } |
| ring.points[29] = gfx::Point(middle.x(), middle.bottom()); |
| ring.points[30] = gfx::Point(middle.x(), middle.bottom() - margin); |
| ring.points[31] = gfx::Point(middle.x(), middle.y() + margin); |
| ring.points[32] = gfx::Point(middle.x(), middle.y()); |
| if (top.x() > middle.x()) { |
| ring.points[33] = gfx::Point(middle.x() + margin, middle.y()); |
| ring.points[34] = gfx::Point(top.x() - margin, top.bottom()); |
| } else { |
| ring.points[33] = gfx::Point(middle.x(), middle.y()); |
| ring.points[34] = gfx::Point(top.x(), top.bottom()); |
| } |
| ring.points[35] = gfx::Point(top.x(), top.bottom()); |
| |
| return ring; |
| } |
| |
| gfx::Rect AccessibilityFocusRing::GetBounds() const { |
| gfx::Point top_left = points[0]; |
| gfx::Point bottom_right = points[0]; |
| for (size_t i = 1; i < 36; ++i) { |
| top_left.SetToMin(points[i]); |
| bottom_right.SetToMax(points[i]); |
| } |
| return gfx::Rect(top_left, gfx::Size(bottom_right.x() - top_left.x(), |
| bottom_right.y() - top_left.y())); |
| } |
| |
| } // namespace chromecast |