| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.recents.misc; |
| |
| import android.content.Intent; |
| import android.graphics.Color; |
| import android.graphics.Matrix; |
| import android.graphics.Rect; |
| import android.view.View; |
| import com.android.systemui.recents.RecentsConfiguration; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| |
| /* Common code */ |
| public class Utilities { |
| |
| // Reflection methods for altering shadows |
| private static Method sPropertyMethod; |
| static { |
| try { |
| Class<?> c = Class.forName("android.view.GLES20Canvas"); |
| sPropertyMethod = c.getDeclaredMethod("setProperty", String.class, String.class); |
| if (!sPropertyMethod.isAccessible()) sPropertyMethod.setAccessible(true); |
| } catch (ClassNotFoundException e) { |
| e.printStackTrace(); |
| } catch (NoSuchMethodException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** |
| * Calculates a consistent animation duration (ms) for all animations depending on the movement |
| * of the object being animated. |
| */ |
| public static int calculateTranslationAnimationDuration(int distancePx) { |
| return calculateTranslationAnimationDuration(distancePx, 100); |
| } |
| public static int calculateTranslationAnimationDuration(int distancePx, int minDuration) { |
| RecentsConfiguration config = RecentsConfiguration.getInstance(); |
| return Math.max(minDuration, (int) (1000f /* ms/s */ * |
| (Math.abs(distancePx) / config.animationPxMovementPerSecond))); |
| } |
| |
| /** Scales a rect about its centroid */ |
| public static void scaleRectAboutCenter(Rect r, float scale) { |
| if (scale != 1.0f) { |
| int cx = r.centerX(); |
| int cy = r.centerY(); |
| r.offset(-cx, -cy); |
| r.left = (int) (r.left * scale + 0.5f); |
| r.top = (int) (r.top * scale + 0.5f); |
| r.right = (int) (r.right * scale + 0.5f); |
| r.bottom = (int) (r.bottom * scale + 0.5f); |
| r.offset(cx, cy); |
| } |
| } |
| |
| /** Maps a coorindate in a descendant view into the parent. */ |
| public static float mapCoordInDescendentToSelf(View descendant, View root, |
| float[] coord, boolean includeRootScroll) { |
| ArrayList<View> ancestorChain = new ArrayList<View>(); |
| |
| float[] pt = {coord[0], coord[1]}; |
| |
| View v = descendant; |
| while(v != root && v != null) { |
| ancestorChain.add(v); |
| v = (View) v.getParent(); |
| } |
| ancestorChain.add(root); |
| |
| float scale = 1.0f; |
| int count = ancestorChain.size(); |
| for (int i = 0; i < count; i++) { |
| View v0 = ancestorChain.get(i); |
| // For TextViews, scroll has a meaning which relates to the text position |
| // which is very strange... ignore the scroll. |
| if (v0 != descendant || includeRootScroll) { |
| pt[0] -= v0.getScrollX(); |
| pt[1] -= v0.getScrollY(); |
| } |
| |
| v0.getMatrix().mapPoints(pt); |
| pt[0] += v0.getLeft(); |
| pt[1] += v0.getTop(); |
| scale *= v0.getScaleX(); |
| } |
| |
| coord[0] = pt[0]; |
| coord[1] = pt[1]; |
| return scale; |
| } |
| |
| /** Maps a coordinate in the root to a descendent. */ |
| public static float mapCoordInSelfToDescendent(View descendant, View root, |
| float[] coord, Matrix tmpInverseMatrix) { |
| ArrayList<View> ancestorChain = new ArrayList<View>(); |
| |
| float[] pt = {coord[0], coord[1]}; |
| |
| View v = descendant; |
| while(v != root) { |
| ancestorChain.add(v); |
| v = (View) v.getParent(); |
| } |
| ancestorChain.add(root); |
| |
| float scale = 1.0f; |
| int count = ancestorChain.size(); |
| tmpInverseMatrix.set(Matrix.IDENTITY_MATRIX); |
| for (int i = count - 1; i >= 0; i--) { |
| View ancestor = ancestorChain.get(i); |
| View next = i > 0 ? ancestorChain.get(i-1) : null; |
| |
| pt[0] += ancestor.getScrollX(); |
| pt[1] += ancestor.getScrollY(); |
| |
| if (next != null) { |
| pt[0] -= next.getLeft(); |
| pt[1] -= next.getTop(); |
| next.getMatrix().invert(tmpInverseMatrix); |
| tmpInverseMatrix.mapPoints(pt); |
| scale *= next.getScaleX(); |
| } |
| } |
| |
| coord[0] = pt[0]; |
| coord[1] = pt[1]; |
| return scale; |
| } |
| |
| /** Calculates the constrast between two colors, using the algorithm provided by the WCAG v2. */ |
| public static float computeContrastBetweenColors(int bg, int fg) { |
| float bgR = Color.red(bg) / 255f; |
| float bgG = Color.green(bg) / 255f; |
| float bgB = Color.blue(bg) / 255f; |
| bgR = (bgR < 0.03928f) ? bgR / 12.92f : (float) Math.pow((bgR + 0.055f) / 1.055f, 2.4f); |
| bgG = (bgG < 0.03928f) ? bgG / 12.92f : (float) Math.pow((bgG + 0.055f) / 1.055f, 2.4f); |
| bgB = (bgB < 0.03928f) ? bgB / 12.92f : (float) Math.pow((bgB + 0.055f) / 1.055f, 2.4f); |
| float bgL = 0.2126f * bgR + 0.7152f * bgG + 0.0722f * bgB; |
| |
| float fgR = Color.red(fg) / 255f; |
| float fgG = Color.green(fg) / 255f; |
| float fgB = Color.blue(fg) / 255f; |
| fgR = (fgR < 0.03928f) ? fgR / 12.92f : (float) Math.pow((fgR + 0.055f) / 1.055f, 2.4f); |
| fgG = (fgG < 0.03928f) ? fgG / 12.92f : (float) Math.pow((fgG + 0.055f) / 1.055f, 2.4f); |
| fgB = (fgB < 0.03928f) ? fgB / 12.92f : (float) Math.pow((fgB + 0.055f) / 1.055f, 2.4f); |
| float fgL = 0.2126f * fgR + 0.7152f * fgG + 0.0722f * fgB; |
| |
| return Math.abs((fgL + 0.05f) / (bgL + 0.05f)); |
| } |
| |
| /** Returns the base color overlaid with another overlay color with a specified alpha. */ |
| public static int getColorWithOverlay(int baseColor, int overlayColor, float overlayAlpha) { |
| return Color.rgb( |
| (int) (overlayAlpha * Color.red(baseColor) + |
| (1f - overlayAlpha) * Color.red(overlayColor)), |
| (int) (overlayAlpha * Color.green(baseColor) + |
| (1f - overlayAlpha) * Color.green(overlayColor)), |
| (int) (overlayAlpha * Color.blue(baseColor) + |
| (1f - overlayAlpha) * Color.blue(overlayColor))); |
| } |
| |
| /** Sets some private shadow properties. */ |
| public static void setShadowProperty(String property, String value) |
| throws IllegalAccessException, InvocationTargetException { |
| sPropertyMethod.invoke(null, property, value); |
| } |
| |
| /** Returns whether the specified intent is a document. */ |
| public static boolean isDocument(Intent intent) { |
| int flags = intent.getFlags(); |
| return (flags & Intent.FLAG_ACTIVITY_NEW_DOCUMENT) == Intent.FLAG_ACTIVITY_NEW_DOCUMENT; |
| } |
| } |