mirror of https://github.com/tasks/tasks
Add TagFormatter
Alex Baker
9 years ago
parent
ca8b3ca872
commit
7a8af4e46f
@ -0,0 +1,125 @@
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package org.tasks.tasklist;
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import android.content.Context;
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import android.text.SpannableString;
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import android.text.SpannableStringBuilder;
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import android.text.Spanned;
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import android.text.style.BackgroundColorSpan;
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import android.text.style.ForegroundColorSpan;
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import android.util.TypedValue;
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import com.google.common.base.Function;
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import com.google.common.base.Predicates;
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import com.google.common.collect.Ordering;
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import com.todoroo.astrid.data.TagData;
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import com.todoroo.astrid.tags.TagService;
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import org.tasks.R;
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import org.tasks.injection.ForApplication;
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import org.tasks.themes.ThemeCache;
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import org.tasks.themes.ThemeColor;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.inject.Inject;
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import static com.google.common.collect.Iterables.filter;
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import static com.google.common.collect.Lists.transform;
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public class TagFormatter {
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private static final char SPACE = '\u0020';
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private static final char HAIR_SPACE = '\u200a';
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private final Map<String, TagData> tagMap = new HashMap<>();
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private final TagService tagService;
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private final ThemeCache themeCache;
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private final float tagCharacters;
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@Inject
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public TagFormatter(@ForApplication Context context, TagService tagService, ThemeCache themeCache) {
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this.tagService = tagService;
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this.themeCache = themeCache;
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TypedValue typedValue = new TypedValue();
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context.getResources().getValue(R.dimen.tag_characters, typedValue, true);
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tagCharacters = typedValue.getFloat();
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}
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public void updateTagMap() {
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tagMap.clear();
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for (TagData tagData : tagService.getTagList()) {
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tagMap.put(tagData.getUuid(), tagData);
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}
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}
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public CharSequence getTagString(List<String> tagUuids) {
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Iterable<TagData> t = filter(transform(tagUuids, uuidToTag), Predicates.notNull());
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List<TagData> firstFourByName = orderByName.leastOf(t, 4);
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int numTags = firstFourByName.size();
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if (numTags == 0) {
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return null;
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}
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List<TagData> firstFourByNameLength = orderByLength.sortedCopy(firstFourByName);
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float maxLength = tagCharacters / numTags;
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for (int i = 0; i < numTags - 1; i++) {
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TagData tagData = firstFourByNameLength.get(i);
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String name = tagData.getName();
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if (name.length() >= maxLength) {
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break;
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}
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float excess = maxLength - name.length();
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int beneficiaries = numTags - i - 1;
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float additional = excess / beneficiaries;
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maxLength += additional;
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}
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List<SpannableString> tagStrings = transform(firstFourByName, tagToString(maxLength));
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SpannableStringBuilder builder = new SpannableStringBuilder();
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for (SpannableString tagString : tagStrings) {
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if (builder.length() > 0) {
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builder.append(HAIR_SPACE);
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}
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builder.append(tagString);
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}
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return builder;
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}
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private Function<TagData, SpannableString> tagToString(final float maxLength) {
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return tagData -> {
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String tagName = tagData.getName();
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tagName = tagName.substring(0, Math.min(tagName.length(), (int) maxLength));
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SpannableString string = new SpannableString(SPACE + tagName + SPACE);
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int themeIndex = tagData.getColor();
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ThemeColor color = themeIndex >= 0 ? themeCache.getThemeColor(themeIndex) : themeCache.getUntaggedColor();
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string.setSpan(new BackgroundColorSpan(color.getPrimaryColor()), 0, string.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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string.setSpan(new ForegroundColorSpan(color.getActionBarTint()), 0, string.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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return string;
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};
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}
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private final Function<String, TagData> uuidToTag = tagMap::get;
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private final Ordering<TagData> orderByName = new Ordering<TagData>() {
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@Override
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public int compare(TagData left, TagData right) {
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return left.getName().compareTo(right.getName());
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}
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};
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private final Ordering<TagData> orderByLength = new Ordering<TagData>() {
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@Override
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public int compare(TagData left, TagData right) {
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int leftLength = left.getName().length();
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int rightLength = right.getName().length();
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if (leftLength < rightLength) {
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return -1;
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} else if (rightLength < leftLength) {
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return 1;
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} else {
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return 0;
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}
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}
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};
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}
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