1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 package android.support.v17.leanback.widget; 15 16 import static android.support.v17.leanback.widget.ItemAlignmentFacet.ITEM_ALIGN_OFFSET_PERCENT_DISABLED; 17 import static android.support.v7.widget.RecyclerView.HORIZONTAL; 18 19 import android.graphics.Paint; 20 import android.graphics.Rect; 21 import android.support.v17.leanback.widget.GridLayoutManager.LayoutParams; 22 import android.view.View; 23 import android.view.ViewGroup; 24 import android.widget.TextView; 25 26 /** 27 * Helper class to handle ItemAlignmentFacet in a grid view. 28 */ 29 class ItemAlignmentFacetHelper { 30 31 private static Rect sRect = new Rect(); 32 33 /** 34 * get alignment position relative to optical left/top of itemView. 35 */ getAlignmentPosition(View itemView, ItemAlignmentFacet.ItemAlignmentDef facet, int orientation)36 static int getAlignmentPosition(View itemView, ItemAlignmentFacet.ItemAlignmentDef facet, 37 int orientation) { 38 LayoutParams p = (LayoutParams) itemView.getLayoutParams(); 39 View view = itemView; 40 if (facet.mViewId != 0) { 41 view = itemView.findViewById(facet.mViewId); 42 if (view == null) { 43 view = itemView; 44 } 45 } 46 int alignPos = facet.mOffset; 47 if (orientation == HORIZONTAL) { 48 if (facet.mOffset >= 0) { 49 if (facet.mOffsetWithPadding) { 50 alignPos += view.getPaddingLeft(); 51 } 52 } else { 53 if (facet.mOffsetWithPadding) { 54 alignPos -= view.getPaddingRight(); 55 } 56 } 57 if (facet.mOffsetPercent != ITEM_ALIGN_OFFSET_PERCENT_DISABLED) { 58 alignPos += ((view == itemView ? p.getOpticalWidth(view) : view.getWidth()) 59 * facet.mOffsetPercent) / 100f; 60 } 61 if (itemView != view) { 62 sRect.left = alignPos; 63 ((ViewGroup) itemView).offsetDescendantRectToMyCoords(view, sRect); 64 alignPos = sRect.left - p.getOpticalLeftInset(); 65 } 66 } else { 67 if (facet.mOffset >= 0) { 68 if (facet.mOffsetWithPadding) { 69 alignPos += view.getPaddingTop(); 70 } 71 } else { 72 if (facet.mOffsetWithPadding) { 73 alignPos -= view.getPaddingBottom(); 74 } 75 } 76 if (facet.mOffsetPercent != ITEM_ALIGN_OFFSET_PERCENT_DISABLED) { 77 alignPos += ((view == itemView ? p.getOpticalHeight(view) : view.getHeight()) 78 * facet.mOffsetPercent) / 100f; 79 } 80 if (itemView != view) { 81 sRect.top = alignPos; 82 ((ViewGroup) itemView).offsetDescendantRectToMyCoords(view, sRect); 83 alignPos = sRect.top - p.getOpticalTopInset(); 84 } 85 if (view instanceof TextView && facet.isAlignedToTextViewBaseLine()) { 86 Paint textPaint = ((TextView)view).getPaint(); 87 int titleViewTextHeight = -textPaint.getFontMetricsInt().top; 88 alignPos += titleViewTextHeight; 89 } 90 } 91 return alignPos; 92 } 93 94 } 95