blob: a3c8e7038e7dd3006edc8e46a27679da355deb74 [file] [log] [blame]
 // 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 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