diff options
Diffstat (limited to 'src/com/android/tv/dvr/ui/browse/DetailsContentPresenter.java')
| -rw-r--r-- | src/com/android/tv/dvr/ui/browse/DetailsContentPresenter.java | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/src/com/android/tv/dvr/ui/browse/DetailsContentPresenter.java b/src/com/android/tv/dvr/ui/browse/DetailsContentPresenter.java new file mode 100644 index 00000000..09b57887 --- /dev/null +++ b/src/com/android/tv/dvr/ui/browse/DetailsContentPresenter.java @@ -0,0 +1,319 @@ +/* + * Copyright (C) 2016 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.tv.dvr.ui.browse; + +import android.app.Activity; +import android.animation.Animator; +import android.animation.AnimatorSet; +import android.animation.ObjectAnimator; +import android.animation.PropertyValuesHolder; +import android.content.Context; +import android.graphics.Paint; +import android.graphics.Paint.FontMetricsInt; +import android.support.v17.leanback.widget.Presenter; +import android.text.TextUtils; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.view.ViewTreeObserver; +import android.view.accessibility.AccessibilityManager; +import android.widget.LinearLayout; +import android.widget.TextView; + +import com.android.tv.R; +import com.android.tv.ui.ViewUtils; +import com.android.tv.util.Utils; + +/** + * An {@link Presenter} for rendering a detailed description of an DVR item. + * Typically this Presenter will be used in a + * {@link android.support.v17.leanback.widget.DetailsOverviewRowPresenter}. + * Most codes of this class is originated from + * {@link android.support.v17.leanback.widget.AbstractDetailsDescriptionPresenter}. + * The latter class are re-used to provide a customized version of + * {@link android.support.v17.leanback.widget.DetailsOverviewRow}. + */ +class DetailsContentPresenter extends Presenter { + /** + * The ViewHolder for the {@link DetailsContentPresenter}. + */ + public static class ViewHolder extends Presenter.ViewHolder { + final TextView mTitle; + final TextView mSubtitle; + final LinearLayout mDescriptionContainer; + final TextView mBody; + final TextView mReadMoreView; + final int mTitleMargin; + final int mUnderTitleBaselineMargin; + final int mUnderSubtitleBaselineMargin; + final int mTitleLineSpacing; + final int mBodyLineSpacing; + final int mBodyMaxLines; + final int mBodyMinLines; + final FontMetricsInt mTitleFontMetricsInt; + final FontMetricsInt mSubtitleFontMetricsInt; + final FontMetricsInt mBodyFontMetricsInt; + final int mTitleMaxLines; + + private Activity mActivity; + private boolean mFullTextMode; + private int mFullTextAnimationDuration; + private boolean mIsListeningToPreDraw; + + private ViewTreeObserver.OnPreDrawListener mPreDrawListener = + new ViewTreeObserver.OnPreDrawListener() { + @Override + public boolean onPreDraw() { + if (mSubtitle.getVisibility() == View.VISIBLE + && mSubtitle.getTop() > view.getHeight() + && mTitle.getLineCount() > 1) { + mTitle.setMaxLines(mTitle.getLineCount() - 1); + return false; + } + final int bodyLines = mBody.getLineCount(); + int maxLines = mFullTextMode ? bodyLines : + (mTitle.getLineCount() > 1 ? mBodyMinLines : mBodyMaxLines); + if (bodyLines > maxLines) { + mReadMoreView.setVisibility(View.VISIBLE); + mDescriptionContainer.setFocusable(true); + mDescriptionContainer.setClickable(true); + mDescriptionContainer.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + mFullTextMode = true; + mReadMoreView.setVisibility(View.GONE); + mDescriptionContainer.setFocusable(( + (AccessibilityManager) view.getContext() + .getSystemService( + Context.ACCESSIBILITY_SERVICE)) + .isEnabled()); + mDescriptionContainer.setClickable(false); + mDescriptionContainer.setOnClickListener(null); + int oldMaxLines = mBody.getMaxLines(); + mBody.setMaxLines(bodyLines); + // Minus 1 from line difference to eliminate the space + // originally occupied by "READ MORE" + showFullText((bodyLines - oldMaxLines - 1) * mBodyLineSpacing); + } + }); + } + if (mReadMoreView.getVisibility() == View.VISIBLE + && mSubtitle.getVisibility() == View.VISIBLE) { + // If both "READ MORE" and subtitle is shown, the capable maximum lines + // will be one line less. + maxLines -= 1; + } + if (mBody.getMaxLines() != maxLines) { + mBody.setMaxLines(maxLines); + return false; + } else { + removePreDrawListener(); + return true; + } + } + }; + + public ViewHolder(final View view) { + super(view); + view.addOnAttachStateChangeListener( + new View.OnAttachStateChangeListener() { + @Override + public void onViewAttachedToWindow(View v) { + // In case predraw listener was removed in detach, make sure + // we have the proper layout. + addPreDrawListener(); + } + + @Override + public void onViewDetachedFromWindow(View v) { + removePreDrawListener(); + } + }); + mTitle = (TextView) view.findViewById(R.id.dvr_details_description_title); + mSubtitle = (TextView) view.findViewById(R.id.dvr_details_description_subtitle); + mBody = (TextView) view.findViewById(R.id.dvr_details_description_body); + mDescriptionContainer = + (LinearLayout) view.findViewById(R.id.dvr_details_description_container); + // We have to explicitly set focusable to true here for accessibility, since we might + // set the view's focusable state when we need to show "READ MORE", which would remove + // the default focusable state for accessibility. + mDescriptionContainer.setFocusable(((AccessibilityManager) view.getContext() + .getSystemService(Context.ACCESSIBILITY_SERVICE)).isEnabled()); + mReadMoreView = (TextView) view.findViewById(R.id.dvr_details_description_read_more); + + FontMetricsInt titleFontMetricsInt = getFontMetricsInt(mTitle); + final int titleAscent = view.getResources().getDimensionPixelSize( + R.dimen.lb_details_description_title_baseline); + // Ascent is negative + mTitleMargin = titleAscent + titleFontMetricsInt.ascent; + + mUnderTitleBaselineMargin = view.getResources().getDimensionPixelSize( + R.dimen.lb_details_description_under_title_baseline_margin); + mUnderSubtitleBaselineMargin = view.getResources().getDimensionPixelSize( + R.dimen.dvr_details_description_under_subtitle_baseline_margin); + + mTitleLineSpacing = view.getResources().getDimensionPixelSize( + R.dimen.lb_details_description_title_line_spacing); + mBodyLineSpacing = view.getResources().getDimensionPixelSize( + R.dimen.lb_details_description_body_line_spacing); + + mBodyMaxLines = view.getResources().getInteger( + R.integer.lb_details_description_body_max_lines); + mBodyMinLines = view.getResources().getInteger( + R.integer.lb_details_description_body_min_lines); + mTitleMaxLines = mTitle.getMaxLines(); + + mTitleFontMetricsInt = getFontMetricsInt(mTitle); + mSubtitleFontMetricsInt = getFontMetricsInt(mSubtitle); + mBodyFontMetricsInt = getFontMetricsInt(mBody); + } + + void addPreDrawListener() { + if (!mIsListeningToPreDraw) { + mIsListeningToPreDraw = true; + view.getViewTreeObserver().addOnPreDrawListener(mPreDrawListener); + } + } + + void removePreDrawListener() { + if (mIsListeningToPreDraw) { + view.getViewTreeObserver().removeOnPreDrawListener(mPreDrawListener); + mIsListeningToPreDraw = false; + } + } + + public TextView getTitle() { + return mTitle; + } + + public TextView getSubtitle() { + return mSubtitle; + } + + public TextView getBody() { + return mBody; + } + + private FontMetricsInt getFontMetricsInt(TextView textView) { + Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); + paint.setTextSize(textView.getTextSize()); + paint.setTypeface(textView.getTypeface()); + return paint.getFontMetricsInt(); + } + + private void showFullText(int heightDiff) { + final ViewGroup detailsFrame = (ViewGroup) mActivity.findViewById(R.id.details_frame); + int nowHeight = ViewUtils.getLayoutHeight(detailsFrame); + Animator expandAnimator = ViewUtils.createHeightAnimator( + detailsFrame, nowHeight, nowHeight + heightDiff); + expandAnimator.setDuration(mFullTextAnimationDuration); + Animator shiftAnimator = ObjectAnimator.ofPropertyValuesHolder(detailsFrame, + PropertyValuesHolder.ofFloat(View.TRANSLATION_Y, + 0f, -(heightDiff / 2))); + shiftAnimator.setDuration(mFullTextAnimationDuration); + AnimatorSet fullTextAnimator = new AnimatorSet(); + fullTextAnimator.playTogether(expandAnimator, shiftAnimator); + fullTextAnimator.start(); + } + } + + private final Activity mActivity; + private final int mFullTextAnimationDuration; + + public DetailsContentPresenter(Activity activity) { + super(); + mActivity = activity; + mFullTextAnimationDuration = mActivity.getResources() + .getInteger(R.integer.dvr_details_full_text_animation_duration); + } + + @Override + public final ViewHolder onCreateViewHolder(ViewGroup parent) { + View v = LayoutInflater.from(parent.getContext()) + .inflate(R.layout.dvr_details_description, parent, false); + return new ViewHolder(v); + } + + @Override + public final void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) { + final ViewHolder vh = (ViewHolder) viewHolder; + final DetailsContent detailsContent = (DetailsContent) item; + + vh.mActivity = mActivity; + vh.mFullTextAnimationDuration = mFullTextAnimationDuration; + + boolean hasTitle = true; + if (TextUtils.isEmpty(detailsContent.getTitle())) { + vh.mTitle.setVisibility(View.GONE); + hasTitle = false; + } else { + vh.mTitle.setText(detailsContent.getTitle()); + vh.mTitle.setVisibility(View.VISIBLE); + vh.mTitle.setLineSpacing(vh.mTitleLineSpacing - vh.mTitle.getLineHeight() + + vh.mTitle.getLineSpacingExtra(), vh.mTitle.getLineSpacingMultiplier()); + vh.mTitle.setMaxLines(vh.mTitleMaxLines); + } + setTopMargin(vh.mTitle, vh.mTitleMargin); + + boolean hasSubtitle = true; + if (detailsContent.getStartTimeUtcMillis() != DetailsContent.INVALID_TIME + && detailsContent.getEndTimeUtcMillis() != DetailsContent.INVALID_TIME) { + vh.mSubtitle.setText(Utils.getDurationString(viewHolder.view.getContext(), + detailsContent.getStartTimeUtcMillis(), + detailsContent.getEndTimeUtcMillis(), false)); + vh.mSubtitle.setVisibility(View.VISIBLE); + if (hasTitle) { + setTopMargin(vh.mSubtitle, vh.mUnderTitleBaselineMargin + + vh.mSubtitleFontMetricsInt.ascent - vh.mTitleFontMetricsInt.descent); + } else { + setTopMargin(vh.mSubtitle, 0); + } + } else { + vh.mSubtitle.setVisibility(View.GONE); + hasSubtitle = false; + } + + if (TextUtils.isEmpty(detailsContent.getDescription())) { + vh.mBody.setVisibility(View.GONE); + } else { + vh.mBody.setText(detailsContent.getDescription()); + vh.mBody.setVisibility(View.VISIBLE); + vh.mBody.setLineSpacing(vh.mBodyLineSpacing - vh.mBody.getLineHeight() + + vh.mBody.getLineSpacingExtra(), vh.mBody.getLineSpacingMultiplier()); + if (hasSubtitle) { + setTopMargin(vh.mDescriptionContainer, vh.mUnderSubtitleBaselineMargin + + vh.mBodyFontMetricsInt.ascent - vh.mSubtitleFontMetricsInt.descent + - vh.mBody.getPaddingTop()); + } else if (hasTitle) { + setTopMargin(vh.mDescriptionContainer, vh.mUnderTitleBaselineMargin + + vh.mBodyFontMetricsInt.ascent - vh.mTitleFontMetricsInt.descent + - vh.mBody.getPaddingTop()); + } else { + setTopMargin(vh.mDescriptionContainer, 0); + } + } + } + + @Override + public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { } + + private void setTopMargin(View view, int topMargin) { + ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) view.getLayoutParams(); + lp.topMargin = topMargin; + view.setLayoutParams(lp); + } +}
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