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Move formatting logic to separate class on Android (#563)
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android/src/main/java/com/expensify/livemarkdown/MarkdownFormatter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package com.expensify.livemarkdown; | ||
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| import android.content.res.AssetManager; | ||
| import android.text.SpannableStringBuilder; | ||
| import android.text.Spanned; | ||
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| import androidx.annotation.NonNull; | ||
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| import com.expensify.livemarkdown.spans.*; | ||
| import com.facebook.react.views.text.internal.span.CustomLineHeightSpan; | ||
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| import java.util.List; | ||
| import java.util.Objects; | ||
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| public class MarkdownFormatter { | ||
| private final @NonNull AssetManager mAssetManager; | ||
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| public MarkdownFormatter(@NonNull AssetManager assetManager) { | ||
| mAssetManager = assetManager; | ||
| } | ||
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| public void format(SpannableStringBuilder ssb, List<MarkdownRange> markdownRanges, @NonNull MarkdownStyle markdownStyle) { | ||
| Objects.requireNonNull(markdownStyle, "mMarkdownStyle is null"); | ||
| removeSpans(ssb); | ||
| applyRanges(ssb, markdownRanges, markdownStyle); | ||
| } | ||
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| private void removeSpans(SpannableStringBuilder ssb) { | ||
| // We shouldn't use `removeSpans()` because it also removes SpellcheckSpan, SuggestionSpan etc. | ||
| MarkdownSpan[] spans = ssb.getSpans(0, ssb.length(), MarkdownSpan.class); | ||
| for (MarkdownSpan span : spans) { | ||
| ssb.removeSpan(span); | ||
| } | ||
| } | ||
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| private void applyRanges(SpannableStringBuilder ssb, List<MarkdownRange> markdownRanges, @NonNull MarkdownStyle markdownStyle) { | ||
| for (MarkdownRange markdownRange : markdownRanges) { | ||
| applyRange(ssb, markdownRange, markdownStyle); | ||
| } | ||
| } | ||
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| private void applyRange(SpannableStringBuilder ssb, MarkdownRange markdownRange, MarkdownStyle markdownStyle) { | ||
| String type = markdownRange.getType(); | ||
| int start = markdownRange.getStart(); | ||
| int end = start + markdownRange.getLength(); | ||
| switch (type) { | ||
| case "bold": | ||
| setSpan(ssb, new MarkdownBoldSpan(), start, end); | ||
| break; | ||
| case "italic": | ||
| setSpan(ssb, new MarkdownItalicSpan(), start, end); | ||
| break; | ||
| case "strikethrough": | ||
| setSpan(ssb, new MarkdownStrikethroughSpan(), start, end); | ||
| break; | ||
| case "emoji": | ||
| setSpan(ssb, new MarkdownEmojiSpan(markdownStyle.getEmojiFontSize()), start, end); | ||
| break; | ||
| case "mention-here": | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getMentionHereColor()), start, end); | ||
| setSpan(ssb, new MarkdownBackgroundColorSpan(markdownStyle.getMentionHereBackgroundColor()), start, end); | ||
| break; | ||
| case "mention-user": | ||
| // TODO: change mention color when it mentions current user | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getMentionUserColor()), start, end); | ||
| setSpan(ssb, new MarkdownBackgroundColorSpan(markdownStyle.getMentionUserBackgroundColor()), start, end); | ||
| break; | ||
| case "mention-report": | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getMentionReportColor()), start, end); | ||
| setSpan(ssb, new MarkdownBackgroundColorSpan(markdownStyle.getMentionReportBackgroundColor()), start, end); | ||
| break; | ||
| case "syntax": | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getSyntaxColor()), start, end); | ||
| break; | ||
| case "link": | ||
| setSpan(ssb, new MarkdownUnderlineSpan(), start, end); | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getLinkColor()), start, end); | ||
| break; | ||
| case "code": | ||
| setSpan(ssb, new MarkdownFontFamilySpan(markdownStyle.getCodeFontFamily(), mAssetManager), start, end); | ||
| setSpan(ssb, new MarkdownFontSizeSpan(markdownStyle.getCodeFontSize()), start, end); | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getCodeColor()), start, end); | ||
| setSpan(ssb, new MarkdownBackgroundColorSpan(markdownStyle.getCodeBackgroundColor()), start, end); | ||
| break; | ||
| case "pre": | ||
| setSpan(ssb, new MarkdownFontFamilySpan(markdownStyle.getPreFontFamily(), mAssetManager), start, end); | ||
| setSpan(ssb, new MarkdownFontSizeSpan(markdownStyle.getPreFontSize()), start, end); | ||
| setSpan(ssb, new MarkdownForegroundColorSpan(markdownStyle.getPreColor()), start, end); | ||
| setSpan(ssb, new MarkdownBackgroundColorSpan(markdownStyle.getPreBackgroundColor()), start, end); | ||
| break; | ||
| case "h1": | ||
| setSpan(ssb, new MarkdownBoldSpan(), start, end); | ||
| CustomLineHeightSpan[] spans = ssb.getSpans(0, ssb.length(), CustomLineHeightSpan.class); | ||
| if (spans.length >= 1) { | ||
| int lineHeight = spans[0].getLineHeight(); | ||
| setSpan(ssb, new MarkdownLineHeightSpan(lineHeight * 1.5f), start, end); | ||
| } | ||
| // NOTE: size span must be set after line height span to avoid height jumps | ||
| setSpan(ssb, new MarkdownFontSizeSpan(markdownStyle.getH1FontSize()), start, end); | ||
| break; | ||
| case "blockquote": | ||
| MarkdownBlockquoteSpan span = new MarkdownBlockquoteSpan( | ||
| markdownStyle.getBlockquoteBorderColor(), | ||
| markdownStyle.getBlockquoteBorderWidth(), | ||
| markdownStyle.getBlockquoteMarginLeft(), | ||
| markdownStyle.getBlockquotePaddingLeft(), | ||
| markdownRange.getDepth()); | ||
| setSpan(ssb, span, start, end); | ||
| break; | ||
| } | ||
| } | ||
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| private void setSpan(SpannableStringBuilder ssb, MarkdownSpan span, int start, int end) { | ||
| ssb.setSpan(span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); | ||
| } | ||
| } |
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