StoryAdapter.java

package com.airlocksoftware.hackernews.adapter;

import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.FrameLayout;
import android.widget.ListView;
import com.airlocksoftware.hackernews.R;
import com.airlocksoftware.hackernews.activity.MainActivity;
import com.airlocksoftware.hackernews.activity.MainActivity.CommentsTab;
import com.airlocksoftware.hackernews.activity.UserActivity;
import com.airlocksoftware.hackernews.data.UserPrefs;
import com.airlocksoftware.hackernews.fragment.StoryFragment;
import com.airlocksoftware.hackernews.interfaces.TabletLayout;
import com.airlocksoftware.hackernews.model.Story;
import com.airlocksoftware.hackernews.view.SharePopup;
import com.airlocksoftware.holo.adapters.GroupAdapter;
import com.airlocksoftware.holo.image.IconView;
import com.airlocksoftware.holo.type.FontText;
import com.airlocksoftware.holo.utils.AnimUtils;
import com.airlocksoftware.holo.utils.Utils;
import com.airlocksoftware.holo.utils.ViewUtils;
import org.apache.commons.lang3.StringUtils;

import java.io.Serializable;
import java.util.List;

/** Adapter for StoryFragment and SubmissionsFragment. **/
public class StoryAdapter extends GroupAdapter<Story> {

	private long mActiveStoryId;

	private SharePopup mShare;
	private Context mContext;
	private ListView mList;
	private StoryFragment.Callbacks mStoryCallbacks;
	private TabletLayout mTabletInterface;
	private LayoutInflater mInflater;

	// cached resource values
	private final int BRIGHT_ACCENT_COLOR;
	private final int TEXT_COLOR_PRIMARY;
	private final int TEXT_COLOR_SECONDARY;
	private final int DARK_ORANGE_COLOR;
	private final int GRAY_50_COLOR;
	private final String UPVOTE;
	private final String UPVOTED;
	private final Drawable UPVOTE_INDICATOR;

	private static final int STORY_LAYOUT = R.layout.vw_story;
	private static final String STORIES = StoryAdapter.class.getSimpleName() + ".stories";
	private static final String ACTIVE_STORY = StoryAdapter.class.getSimpleName() + ".activeStory";

	private static class ViewHolder {
		public Story story;
		public FontText title, numPoints, numComments, domain, pointsLabel, upvoteLabel;
		public View commentsButton, webButton, ctrlContainer, container, divider;
		public FrameLayout upvoteBtn, shareBtn, userBtn;
		public IconView upvoteIcon, commentIcon;

		/** Whether or not this View is in "active mode" (i.e. Orange background, white text.) **/
		public boolean activeMode = false;

		/** Whether or not this view is in "upvoted mode".(i.e. disabled vote listener, orange icon, etc.) **/
		public boolean upvotedMode = false;
	}

	public StoryAdapter(Context context, ListView list, SharePopup share, StoryFragment.Callbacks storyCallbacks,
			TabletLayout tabletLayout) {
		mContext = context;
		mList = list;
		mShare = share;
		mStoryCallbacks = storyCallbacks;
		mTabletInterface = tabletLayout;
		mInflater = LayoutInflater.from(mContext);

		// cache reusable resources
		Resources res = mContext.getResources();
		TEXT_COLOR_PRIMARY = res.getColor(Utils.getThemedResourceId(mContext, R.attr.textColorPrimary));
		TEXT_COLOR_SECONDARY = res.getColor(Utils.getThemedResourceId(mContext, R.attr.textColorSecondary));
		BRIGHT_ACCENT_COLOR = res.getColor(R.color.bright_accent);
		DARK_ORANGE_COLOR = res.getColor(R.color.orange_5);
		GRAY_50_COLOR = res.getColor(R.color.gray_50);
		UPVOTE_INDICATOR = res.getDrawable(R.drawable.bg_story_upvote_indicator);
		UPVOTED = mContext.getString(R.string.upvoted);
		UPVOTE = mContext.getString(R.string.upvote);
	}

	@Override
	public View getView(Story story, View convertView, ViewGroup parent) {
		ViewHolder holder;
		if (convertView == null) {

			// inflate the layout
			convertView = mInflater.inflate(STORY_LAYOUT, parent, false);

			// find views for ViewHolder
			holder = new ViewHolder();
			findHolderViews(convertView, holder);

			// fix background repeats
			ViewUtils.fixBackgroundRepeat(holder.webButton);
			ViewUtils.fixBackgroundRepeat(holder.commentsButton);

			// attach click listeners
			attachClickListeners(holder);

			// set holder as tag on views that have click listeners
			attachTags(convertView, holder);

		} else {
			holder = (ViewHolder) convertView.getTag();
		}

		bindView(story, holder);
		return convertView;
	}

	private void attachTags(View convertView, ViewHolder holder) {
		convertView.setTag(holder);
		holder.webButton.setTag(holder);
		holder.commentsButton.setTag(holder);
		holder.upvoteBtn.setTag(holder);
		holder.shareBtn.setTag(holder);
		holder.userBtn.setTag(holder);
	}

	private void attachClickListeners(ViewHolder holder) {
		holder.webButton.setOnClickListener(mClickListener);
		holder.commentsButton.setOnClickListener(mClickListener);
		holder.webButton.setOnLongClickListener(mLongListener);
		holder.commentsButton.setOnLongClickListener(mLongListener);
		holder.shareBtn.setOnClickListener(mShareListener);
		holder.upvoteBtn.setOnClickListener(mVoteListener);
		holder.userBtn.setOnClickListener(mUserListener);
	}

	private void findHolderViews(View convertView, ViewHolder holder) {
		holder.container = convertView;
		holder.title = (FontText) convertView.findViewById(R.id.txt_title);
		holder.numPoints = (FontText) convertView.findViewById(R.id.txt_num_pts);
		holder.numComments = (FontText) convertView.findViewById(R.id.txt_num_comments);
		holder.domain = (FontText) convertView.findViewById(R.id.txt_domain);
		holder.commentsButton = convertView.findViewById(R.id.btn_comments);
		holder.webButton = convertView.findViewById(R.id.btn_web);
		holder.ctrlContainer = convertView.findViewById(R.id.cnt_ctrl);
		holder.shareBtn = (FrameLayout) convertView.findViewById(R.id.btn_share);
		holder.userBtn = (FrameLayout) convertView.findViewById(R.id.btn_user);
		holder.upvoteBtn = (FrameLayout) convertView.findViewById(R.id.btn_upvote);
		holder.upvoteIcon = (IconView) convertView.findViewById(R.id.icv_upvote);
		holder.upvoteLabel = (FontText) convertView.findViewById(R.id.txt_upvote);
		holder.pointsLabel = (FontText) convertView.findViewById(R.id.txt_pts);
		holder.commentIcon = (IconView) convertView.findViewById(R.id.icv_comment);
		holder.divider = convertView.findViewById(R.id.divider);
	}

	public void setActiveStory(Story story) {
		if (story != null) {
			mActiveStoryId = story.storyId;
			notifyDataSetChanged();
		}
	}

	private void bindView(Story story, ViewHolder holder) {
		holder.story = story;
		if (holder.ctrlContainer.getVisibility() != View.GONE) holder.ctrlContainer.setVisibility(View.GONE);

		bindTextViews(story, holder);
		bindIsJobsPost(story, holder, Story.isYCombinatorJobPost(story));

		// holder.upvotedMode caches whether this view has been configured to show an upvoted story
		// if upvotedMode != story.isUpvoted, then we need reconfigure the view
		if (story.isUpvoted != holder.upvotedMode) {
			bindIsUpvoted(story, holder);
		}

		// if this is the active story & the view isn't already in activeMode,
		// change background & colors, hide divider, and disable click listeners
		if (mTabletInterface != null && mTabletInterface.isTabletLayout()) {
			boolean isActiveStory = story.storyId == mActiveStoryId;
			if (isActiveStory != holder.activeMode) {
				bindIsActiveStory(holder, isActiveStory);
			}
		}
	}

	private void bindIsActiveStory(ViewHolder holder, boolean isActiveStory) {
		int textColorSecondary = isActiveStory ? Color.WHITE : TEXT_COLOR_SECONDARY;
		holder.numPoints.setTextColor(textColorSecondary);
		holder.numComments.setTextColor(textColorSecondary);
		holder.domain.setTextColor(textColorSecondary);
		holder.pointsLabel.setTextColor(textColorSecondary);

		holder.container.setBackgroundColor(isActiveStory ? DARK_ORANGE_COLOR : Color.TRANSPARENT);
		holder.title.setTextColor(isActiveStory ? Color.WHITE : TEXT_COLOR_PRIMARY);
		holder.commentIcon.iconColor(isActiveStory ? Color.WHITE : GRAY_50_COLOR);
		holder.divider.setVisibility(ViewUtils.boolToVis(!isActiveStory));

		holder.commentsButton.setOnClickListener(isActiveStory ? null : mClickListener);
		holder.commentsButton.setOnLongClickListener(isActiveStory ? null : mLongListener);
		holder.webButton.setOnClickListener(isActiveStory ? null : mClickListener);
		holder.webButton.setOnLongClickListener(isActiveStory ? null : mLongListener);
		holder.commentsButton.setClickable(!isActiveStory);
		holder.commentsButton.setLongClickable(!isActiveStory);
		holder.webButton.setClickable(!isActiveStory);
		holder.webButton.setLongClickable(!isActiveStory);

		holder.activeMode = isActiveStory;
	}

	@SuppressWarnings("deprecation")
	private void bindIsUpvoted(Story story, ViewHolder holder) {
		holder.upvoteIcon.iconColor(story.isUpvoted ? BRIGHT_ACCENT_COLOR : TEXT_COLOR_PRIMARY);
		holder.upvoteLabel.setTextColor(story.isUpvoted ? BRIGHT_ACCENT_COLOR : TEXT_COLOR_PRIMARY);
		holder.upvoteLabel.setText(story.isUpvoted ? UPVOTED : UPVOTE);
		holder.upvoteBtn.setClickable(!story.isUpvoted);
		holder.upvoteBtn.setOnClickListener(story.isUpvoted ? null : mVoteListener);
		holder.numPoints.setBackgroundDrawable(story.isUpvoted ? UPVOTE_INDICATOR : null);
		holder.upvotedMode = story.isUpvoted;
	}

	/** check for YCombinator job post **/
	private void bindIsJobsPost(Story story, ViewHolder holder, boolean isJobPost) {
		// hide / show comments, points, & webButton
		holder.webButton.setVisibility(ViewUtils.boolToVis(StringUtils.isNotBlank(story.url) && !isJobPost));
		holder.commentIcon.setVisibility(ViewUtils.boolToVis(!isJobPost));
		holder.numComments.setVisibility(ViewUtils.boolToVis(!isJobPost));
		holder.numPoints.setVisibility(ViewUtils.boolToVis(!isJobPost));
		holder.pointsLabel.setVisibility(ViewUtils.boolToVis(!isJobPost));
	}

	private void bindTextViews(Story story, ViewHolder holder) {
		holder.title.setText(story.title);
		holder.numPoints.setText(Integer.toString(story.numPoints));
		holder.numComments.setText(Integer.toString(story.numComments));
		holder.domain.setText((story.domain != null) ? story.domain : "");
	}

	// LISTENERS
	private View.OnClickListener mUserListener = new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			ViewHolder holder = (ViewHolder) v.getTag();
			UserActivity.startUserActivity(mContext, holder.story.username);

		}
	};

	private View.OnClickListener mShareListener = new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			ViewHolder holder = (ViewHolder) v.getTag();
			mShare.shareStory(holder.story);
		}
	};

	private View.OnClickListener mVoteListener = new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			ViewHolder holder = (ViewHolder) v.getTag();
			Story story = holder.story;
			story.upvote(mContext);
			hideControls(holder);
			notifyDataSetChanged();
		}
	};

	public View.OnClickListener mClickListener = new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			ViewHolder holder = (ViewHolder) v.getTag();
			CommentsTab tab = v.getId() == R.id.btn_comments ? CommentsTab.COMMENTS : CommentsTab.ARTICLE;
			boolean openInBrowser = new UserPrefs(mContext).getOpenInBrowser();

			// check for open in browser
			if (openInBrowser && tab == CommentsTab.ARTICLE) {
				mContext.startActivity(new Intent(Intent.ACTION_VIEW).setData(Uri.parse(holder.story.url)));
			}

			// if this is in a MainActivity, let mStoryCallbacks handle it
			if (mStoryCallbacks != null) {
				setActiveStory(holder.story);
				mStoryCallbacks.showCommentsForStory(holder.story, tab);
			} else {
				// this is from SubmissionsFragment, and should start a new CommentsActivity
				MainActivity.startCommentsActivity(mContext, null, holder.story, tab);
			}
		}
	};

	private View.OnLongClickListener mLongListener = new View.OnLongClickListener() {
		@Override
		public boolean onLongClick(View v) {
			ViewHolder holder = (ViewHolder) v.getTag();

			if (holder.ctrlContainer.getVisibility() == View.GONE) {

				// scroll to make controls visible
				int height = v.getHeight();
				int ctrlContainerHeight = mContext.getResources()
																					.getDimensionPixelSize(R.dimen.slideout_ctrl_height);
				int scrollY = height + Utils.getWindowLocation(mContext, v).y + ctrlContainerHeight
						- Utils.getScreenSize(mContext).y;
				if (scrollY > 0) mList.smoothScrollBy(scrollY, 200);

				showControls(holder);

			} else {
				hideControls(holder);
			}

			return true;
		}
	};

	private void showControls(ViewHolder holder) {
		// animate the showing of controls
		Animation inAnim = AnimationUtils.loadAnimation(mContext, R.anim.ctrl_scale_down);
		AnimUtils.startInAnimation(holder.ctrlContainer, inAnim);

		// hide divider
		holder.divider.setVisibility(View.GONE);
	}

	private void hideControls(ViewHolder holder) {
		// animate the hiding of controls
		Animation outAnim = AnimationUtils.loadAnimation(mContext, R.anim.ctrl_scale_up);
		AnimUtils.startOutAnimation(holder.ctrlContainer, outAnim);

		// show divider
		holder.divider.setVisibility(View.VISIBLE);
	}

	public Bundle onSaveInstanceState(Bundle bundle) {
		bundle.putLong(ACTIVE_STORY, mActiveStoryId);
		bundle.putSerializable(STORIES, (Serializable) this.getArray());
		return bundle;
	}

	@SuppressWarnings("unchecked")
	public void onRestoreInstanceState(Bundle savedInstanceState) {
		mActiveStoryId = savedInstanceState.getLong(ACTIVE_STORY);
		List<Story> stories = (List<Story>) savedInstanceState.getSerializable(STORIES);
		clear();
		if (stories != null) addAll(stories);
	}

}