/*
* Firetweet - Twitter client for Android
*
* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.getlantern.firetweet.view;
import android.content.Context;
import android.content.res.TypedArray;
import android.support.annotation.IntDef;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.TextView;
import org.getlantern.firetweet.Constants;
import org.getlantern.firetweet.R;
import org.getlantern.firetweet.model.ParcelableMedia;
import org.getlantern.firetweet.util.ImageLoadingHandler;
import org.getlantern.firetweet.util.MediaLoaderWrapper;
import org.getlantern.firetweet.util.Utils.OnMediaClickListener;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* Created by mariotaku on 14/12/17.
*/
public class CardMediaContainer extends ViewGroup implements Constants {
private static final float WIDTH_HEIGHT_RATIO = 0.5f;
private final int mMaxColumns;
private final int mHorizontalSpacing, mVerticalSpacing;
private int[] mTempIndices;
private int mMediaPreviewStyle;
public CardMediaContainer(Context context) {
this(context, null);
}
public CardMediaContainer(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CardMediaContainer(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mMaxColumns = 3;
final TypedArray a = context.obtainStyledAttributes(attrs, new int[]{
android.R.attr.horizontalSpacing, android.R.attr.verticalSpacing});
mHorizontalSpacing = a.getDimensionPixelSize(0, 0);
mVerticalSpacing = a.getDimensionPixelSize(1, 0);
a.recycle();
}
public void displayMedia(@NonNull final int... imageRes) {
for (int i = 0, j = getChildCount(), k = imageRes.length; i < j; i++) {
final View child = getChildAt(i);
final ImageView imageView = (ImageView) child.findViewById(R.id.media_preview);
final View progress = child.findViewById(R.id.media_preview_progress);
progress.setVisibility(GONE);
if (i < k) {
imageView.setImageResource(imageRes[i]);
} else {
imageView.setImageDrawable(null);
child.setVisibility(GONE);
}
}
}
public void displayMedia(@Nullable final ParcelableMedia[] mediaArray,
@NonNull final MediaLoaderWrapper loader,
final long accountId,
final OnMediaClickListener mediaClickListener,
final ImageLoadingHandler loadingHandler) {
if (mediaArray == null || mMediaPreviewStyle == VALUE_MEDIA_PREVIEW_STYLE_CODE_NONE) {
for (int i = 0, j = getChildCount(); i < j; i++) {
final View child = getChildAt(i);
child.setVisibility(GONE);
}
return;
}
final View.OnClickListener clickListener = new ImageGridClickListener(mediaClickListener, accountId);
for (int i = 0, j = getChildCount(), k = mediaArray.length; i < j; i++) {
final View child = getChildAt(i);
child.setOnClickListener(clickListener);
final ImageView imageView = (ImageView) child.findViewById(R.id.media_preview);
switch (mMediaPreviewStyle) {
case VALUE_MEDIA_PREVIEW_STYLE_CODE_CROP: {
imageView.setScaleType(ScaleType.CENTER_CROP);
break;
}
case VALUE_MEDIA_PREVIEW_STYLE_CODE_SCALE: {
imageView.setScaleType(ScaleType.CENTER_INSIDE);
break;
}
}
if (i < k) {
final ParcelableMedia media = mediaArray[i];
loader.displayPreviewImage(imageView, media.page_url, loadingHandler);
child.setTag(media);
child.setVisibility(VISIBLE);
if (i == j - 1) {
final TextView moreIndicator = (TextView) child.findViewById(R.id.more_media);
moreIndicator.setVisibility(j < k ? VISIBLE : GONE);
if (k > j) {
final int extraMediaCount = k - j;
moreIndicator.setText(getResources().getQuantityString(R.plurals.N_media,
extraMediaCount, extraMediaCount));
} else {
moreIndicator.setText(null);
}
}
} else {
loader.cancelDisplayTask(imageView);
child.setVisibility(GONE);
}
}
}
public void setStyle(int style) {
mMediaPreviewStyle = style;
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int[] childIndices = createChildIndices();
final int childCount = getChildIndicesInLayout(this, childIndices);
if (childCount > 0) {
if (childCount == 1) {
layout1Media(childIndices);
} else if (childCount == 3) {
layout3Media(mHorizontalSpacing, mVerticalSpacing, childIndices);
} else {
layoutGridMedia(childCount, 2, mHorizontalSpacing, mVerticalSpacing, childIndices);
}
}
}
private void measure1Media(int contentWidth, int[] childIndices) {
final View child = getChildAt(childIndices[0]);
final int childHeight = Math.round(contentWidth * WIDTH_HEIGHT_RATIO);
final int widthSpec = MeasureSpec.makeMeasureSpec(contentWidth, MeasureSpec.EXACTLY);
final int heightSpec = MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.EXACTLY);
child.measure(widthSpec, heightSpec);
}
private void layout1Media(int[] childIndices) {
final View child = getChildAt(childIndices[0]);
final int left = getPaddingLeft(), top = getPaddingTop();
final int right = left + child.getMeasuredWidth(), bottom = top + child.getMeasuredHeight();
child.layout(left, top, right, bottom);
}
private int measureGridMedia(int childCount, int columnCount, int contentWidth,
float widthHeightRatio, int horizontalSpacing, int verticalSpacing,
int[] childIndices) {
final int childWidth = (contentWidth - horizontalSpacing * (columnCount - 1)) / columnCount;
final int childHeight = Math.round(childWidth * widthHeightRatio);
final int widthSpec = MeasureSpec.makeMeasureSpec(childWidth, MeasureSpec.EXACTLY);
final int heightSpec = MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.EXACTLY);
for (int i = 0; i < childCount; i++) {
getChildAt(childIndices[i]).measure(widthSpec, heightSpec);
}
final int rowsCount = (int) Math.ceil(childCount / (double) columnCount);
return rowsCount * childHeight + (rowsCount - 1) * verticalSpacing;
}
private void layoutGridMedia(int childCount, int columnCount, int horizontalSpacing,
int verticalSpacing, int[] childIndices) {
final int initialLeft = getPaddingLeft();
int left = initialLeft, top = getPaddingTop();
for (int i = 0; i < childCount; i++) {
final int colIdx = i % columnCount;
final View child = getChildAt(childIndices[i]);
child.layout(left, top, left + child.getMeasuredWidth(), top + child.getMeasuredHeight());
if (colIdx == columnCount - 1) {
// Last item in this row, set top of next row to last view bottom + verticalSpacing
top = child.getBottom() + verticalSpacing;
// And reset left to initial left
left = initialLeft;
} else {
// The left of next item is right + horizontalSpacing of previous item
left = child.getRight() + horizontalSpacing;
}
}
}
private void measure3Media(int contentWidth, int horizontalSpacing, int[] childIndices) {
final View child0 = getChildAt(childIndices[0]), child1 = getChildAt(childIndices[1]),
child2 = getChildAt(childIndices[2]);
final int childWidth = (contentWidth - horizontalSpacing) / 2;
final int sizeSpec = MeasureSpec.makeMeasureSpec(childWidth, MeasureSpec.EXACTLY);
child0.measure(sizeSpec, sizeSpec);
final int childRightHeight = Math.round(childWidth - horizontalSpacing) / 2;
final int heightSpec = MeasureSpec.makeMeasureSpec(childRightHeight, MeasureSpec.EXACTLY);
child1.measure(sizeSpec, heightSpec);
child2.measure(sizeSpec, heightSpec);
}
private void layout3Media(int horizontalSpacing, int verticalSpacing, int[] childIndices) {
final int left = getPaddingLeft(), top = getPaddingTop();
final View child0 = getChildAt(childIndices[0]), child1 = getChildAt(childIndices[1]),
child2 = getChildAt(childIndices[2]);
child0.layout(left, top, left + child0.getMeasuredWidth(), top + child0.getMeasuredHeight());
final int rightColLeft = child0.getRight() + horizontalSpacing;
child1.layout(rightColLeft, top, rightColLeft + child1.getMeasuredWidth(),
top + child1.getMeasuredHeight());
final int child2Top = child1.getBottom() + verticalSpacing;
child2.layout(rightColLeft, child2Top, rightColLeft + child2.getMeasuredWidth(),
child2Top + child2.getMeasuredHeight());
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int measuredWidth = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
final int contentWidth = measuredWidth - getPaddingLeft() - getPaddingRight();
final int[] childIndices = createChildIndices();
final int childCount = getChildIndicesInLayout(this, childIndices);
int heightSum = 0;
if (childCount > 0) {
if (childCount == 1) {
measure1Media(contentWidth, childIndices);
heightSum = Math.round(contentWidth * WIDTH_HEIGHT_RATIO);
} else if (childCount == 2) {
measureGridMedia(childCount, 2, contentWidth, 1, mHorizontalSpacing, mVerticalSpacing,
childIndices);
heightSum = Math.round(contentWidth * WIDTH_HEIGHT_RATIO);
} else if (childCount == 3) {
measure3Media(contentWidth, mHorizontalSpacing, childIndices);
heightSum = Math.round(contentWidth * WIDTH_HEIGHT_RATIO);
} else {
heightSum = measureGridMedia(childCount, 2, contentWidth, WIDTH_HEIGHT_RATIO,
mHorizontalSpacing, mVerticalSpacing, childIndices);
}
}
final int height = heightSum + getPaddingTop() + getPaddingBottom();
setMeasuredDimension(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
}
private int[] createChildIndices() {
if (mTempIndices == null || mTempIndices.length < getChildCount()) {
return mTempIndices = new int[getChildCount()];
}
return mTempIndices;
}
private static int getChildIndicesInLayout(ViewGroup viewGroup, int[] indices) {
final int childCount = viewGroup.getChildCount();
int indicesCount = 0;
for (int i = 0; i < childCount; i++) {
if (viewGroup.getChildAt(i).getVisibility() != GONE) {
indices[indicesCount++] = i;
}
}
return indicesCount;
}
private static class ImageGridClickListener implements View.OnClickListener {
private final OnMediaClickListener mListener;
private final long mAccountId;
ImageGridClickListener(final OnMediaClickListener listener, final long accountId) {
mListener = listener;
mAccountId = accountId;
}
@Override
public void onClick(final View v) {
if (mListener == null) return;
mListener.onMediaClick(v, (ParcelableMedia) v.getTag(), mAccountId);
}
}
@IntDef({VALUE_MEDIA_PREVIEW_STYLE_CODE_SCALE, VALUE_MEDIA_PREVIEW_STYLE_CODE_CROP})
@Retention(RetentionPolicy.SOURCE)
public static @interface PreviewStyle {
}
}