Alibek Omarov
5 years ago
parent
4b0c7789c2
commit
8e2b421b1f
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/* Copyright 2017 Andrew Dawson |
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* |
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* This file is a part of Tusky. |
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* |
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* This program is free software; you can redistribute it and/or modify it under the terms of the |
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even |
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along with Tusky; if not, |
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.util; |
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import android.graphics.Bitmap; |
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import android.graphics.Canvas; |
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import android.graphics.Paint; |
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import android.graphics.drawable.BitmapDrawable; |
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import android.graphics.drawable.Drawable; |
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import android.text.SpannableStringBuilder; |
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import android.text.Spanned; |
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import android.text.SpannedString; |
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import android.text.style.ReplacementSpan; |
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import android.view.View; |
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import com.bumptech.glide.Glide; |
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import com.bumptech.glide.request.target.CustomTarget; |
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import com.bumptech.glide.request.target.Target; |
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import com.bumptech.glide.request.transition.Transition; |
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import com.keylesspalace.tusky.entity.Emoji; |
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import java.lang.ref.WeakReference; |
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import java.util.List; |
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import java.util.regex.Matcher; |
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import java.util.regex.Pattern; |
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import androidx.annotation.NonNull; |
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import androidx.annotation.Nullable; |
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public class CustomEmojiHelper { |
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/** |
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* replaces emoji shortcodes in a text with EmojiSpans |
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* @param text the text containing custom emojis |
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* @param emojis a list of the custom emojis (nullable for backward compatibility with old mastodon instances) |
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* @param view a reference to the a view the emojis will be shown in (should be the TextView, but parents of the TextView are also acceptable) |
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* @return the text with the shortcodes replaced by EmojiSpans |
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*/ |
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@NonNull |
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public static Spanned emojifyText(@NonNull Spanned text, @Nullable List<Emoji> emojis, @NonNull final View view) { |
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if (emojis != null && !emojis.isEmpty()) { |
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SpannableStringBuilder builder = new SpannableStringBuilder(text); |
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for (Emoji emoji : emojis) { |
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CharSequence pattern = new StringBuilder(":").append(emoji.getShortcode()).append(':'); |
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Matcher matcher = Pattern.compile(pattern.toString(), Pattern.LITERAL) |
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.matcher(text); |
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while (matcher.find()) { |
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EmojiSpan span = new EmojiSpan(view); |
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builder.setSpan(span, matcher.start(), matcher.end(), 0); |
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Glide.with(view) |
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.asBitmap() |
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.load(emoji.getUrl()) |
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.into(span.getTarget()); |
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} |
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} |
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return builder; |
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} |
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return text; |
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} |
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@NonNull |
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public static Spanned emojifyString(@NonNull String string, @Nullable List<Emoji> emojis, @NonNull final View ciew) { |
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return emojifyText(new SpannedString(string), emojis, ciew); |
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} |
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public static class EmojiSpan extends ReplacementSpan { |
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@Nullable |
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private Drawable imageDrawable; |
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private WeakReference<View> viewWeakReference; |
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EmojiSpan(View view) { |
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this.viewWeakReference = new WeakReference<>(view); |
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} |
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@Override |
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public int getSize(@NonNull Paint paint, CharSequence text, int start, int end, |
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@Nullable Paint.FontMetricsInt fm) { |
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/* update FontMetricsInt or otherwise span does not get drawn when |
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it covers the whole text */ |
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Paint.FontMetricsInt metrics = paint.getFontMetricsInt(); |
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if (fm != null) { |
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fm.top = (int)((float)metrics.top * 1.3); |
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fm.ascent = (int)((float)metrics.ascent * 1.3); |
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fm.descent = (int)((float)metrics.descent * 2.0); |
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fm.bottom = (int)((float)metrics.bottom * 3.5); |
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// fm.leading = (int)((float)metrics.leading); // useless to change
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} |
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return (int) (paint.getTextSize()*2.0); |
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} |
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@Override |
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public void draw(@NonNull Canvas canvas, CharSequence text, int start, int end, float x, |
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int top, int y, int bottom, @NonNull Paint paint) { |
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if (imageDrawable == null) return; |
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canvas.save(); |
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int emojiSize = (int) (paint.getTextSize() * 2.0); |
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imageDrawable.setBounds(0, 0, emojiSize, emojiSize); |
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int transY = bottom - imageDrawable.getBounds().bottom; |
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transY -= paint.getFontMetricsInt().descent/2; |
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canvas.translate(x, transY); |
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imageDrawable.draw(canvas); |
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canvas.restore(); |
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} |
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Target<Bitmap> getTarget(){ |
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return new CustomTarget<Bitmap>() { |
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@Override |
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public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) { |
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View view = viewWeakReference.get(); |
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if (view != null) { |
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imageDrawable = new BitmapDrawable(view.getContext().getResources(), resource); |
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view.invalidate(); |
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} |
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} |
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@Override |
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public void onLoadCleared(@Nullable Drawable placeholder) { |
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//Do nothing on load cleared
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} |
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}; |
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} |
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} |
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} |
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@ -0,0 +1,120 @@ |
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/* Copyright 2017 Andrew Dawson |
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* |
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* This file is a part of Tusky. |
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* |
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* This program is free software; you can redistribute it and/or modify it under the terms of the |
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even |
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along with Tusky; if not, |
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* see <http://www.gnu.org/licenses>. */ |
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package com.keylesspalace.tusky.util |
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import android.graphics.Bitmap |
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import android.graphics.Canvas |
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import android.graphics.Paint |
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import android.graphics.drawable.BitmapDrawable |
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import android.graphics.drawable.Drawable |
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import android.text.SpannableStringBuilder |
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import android.text.Spanned |
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import android.text.SpannedString |
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import android.text.style.ReplacementSpan |
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import android.view.View |
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import com.bumptech.glide.Glide |
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import com.bumptech.glide.request.target.CustomTarget |
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import com.bumptech.glide.request.target.Target |
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import com.bumptech.glide.request.transition.Transition |
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import com.keylesspalace.tusky.entity.Emoji |
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import java.lang.ref.WeakReference |
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import java.util.regex.Pattern |
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import androidx.preference.PreferenceManager |
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/** |
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* replaces emoji shortcodes in a text with EmojiSpans |
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* @param text the text containing custom emojis |
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* @param emojis a list of the custom emojis (nullable for backward compatibility with old mastodon instances) |
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* @param view a reference to the a view the emojis will be shown in (should be the TextView, but parents of the TextView are also acceptable) |
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* @return the text with the shortcodes replaced by EmojiSpans |
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*/ |
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fun emojifyText(text: Spanned, emojis: List<Emoji>?, view: View) : Spanned { |
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if (emojis != null && emojis.isNotEmpty()) { |
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val builder = SpannableStringBuilder(text) |
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for (emoji in emojis) { |
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val pattern = StringBuilder(":").append(emoji.shortcode).append(":") |
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val matcher = Pattern.compile(pattern.toString(), Pattern.LITERAL) |
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.matcher(text) |
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while(matcher.find()) { |
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val span = EmojiSpan(WeakReference<View>(view)) |
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builder.setSpan(span, matcher.start(), matcher.end(), 0); |
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Glide.with(view) |
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.asBitmap() |
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.load(emoji.url) |
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.into(span.getTarget()) |
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} |
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} |
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return builder |
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} |
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return text |
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} |
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fun emojifyString(string: String, emojis: List<Emoji>?, view: View) : Spanned { |
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return emojifyText(SpannedString(string), emojis, view) |
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} |
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public class EmojiSpan(val viewWeakReference: WeakReference<View>) : ReplacementSpan() { |
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var imageDrawable: Drawable? = null |
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override fun getSize(paint: Paint, text: CharSequence, start: Int, end: Int, fm: Paint.FontMetricsInt?) : Int { |
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if (fm != null) { |
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/* update FontMetricsInt or otherwise span does not get drawn when |
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* it covers the whole text */ |
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val metrics = paint.fontMetricsInt |
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fm.top = (metrics.top * 1.3f).toInt() |
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fm.ascent = (metrics.ascent * 1.3f).toInt() |
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fm.descent = (metrics.descent * 2.0f).toInt() |
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fm.bottom = (metrics.bottom * 3.5f).toInt() |
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} |
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return (paint.textSize * 2.0).toInt() |
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} |
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override fun draw(canvas: Canvas, text: CharSequence, start: Int, end: Int, x: Float, top: Int, y: Int, bottom: Int, paint: Paint) { |
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if (imageDrawable == null) |
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return |
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canvas.save() |
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val emojiSize = getSize(paint, text, start, end, null) |
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imageDrawable!!.setBounds(0, 0, emojiSize, emojiSize) |
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var transY = bottom - imageDrawable!!.bounds.bottom |
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transY -= paint.fontMetricsInt.descent / 2; |
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canvas.translate(x, transY.toFloat()) |
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imageDrawable!!.draw(canvas) |
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canvas.restore() |
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} |
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fun getTarget(): Target<Bitmap> { |
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return object : CustomTarget<Bitmap>() { |
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override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) { |
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val view = viewWeakReference.get() |
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if (view != null) { |
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imageDrawable = BitmapDrawable(view.context.resources, resource) |
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view.invalidate() |
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} |
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} |
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override fun onLoadCleared(placeholder: Drawable?) {} |
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} |
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} |
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} |
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