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Add default prism4j theme implementation

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This commit is contained in:
Dimitry Ivanov 2018-07-16 17:23:17 +03:00
parent 5df0299dc0
commit efad173606
2 changed files with 204 additions and 0 deletions
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140
library-syntax/src/main/java/ru/noties/markwon/syntax/Prism4jThemeBase.java Normal file
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package ru.noties.markwon.syntax;
import android.support.annotation.ColorInt;
import android.support.annotation.FloatRange;
import android.support.annotation.IntRange;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.style.ForegroundColorSpan;
import java.util.HashMap;
import ru.noties.markwon.SpannableBuilder;
import ru.noties.prism4j.Prism4j;
public abstract class Prism4jThemeBase implements Prism4jTheme {
@ColorInt
protected static int applyAlpha(@IntRange(from = 0, to = 255) int alpha, @ColorInt int color) {
return (color & 0x00FFFFFF) | (alpha << 24);
}
@ColorInt
protected static int applyAlpha(@FloatRange(from = .0F, to = 1.F) float alpha, @ColorInt int color) {
return applyAlpha((int) (255 * alpha + .5F), color);
}
protected static boolean isOfType(@NonNull String expected, @NonNull String type, @Nullable String alias) {
return expected.equals(type) || expected.equals(alias);
}
private final ColorHashMap colorHashMap;
protected Prism4jThemeBase() {
this.colorHashMap = init();
}
@NonNull
protected abstract ColorHashMap init();
@ColorInt
protected int color(@NonNull String language, @NonNull String type, @Nullable String alias) {
Color color = colorHashMap.get(type);
if (color == null
&& alias != null) {
color = colorHashMap.get(alias);
}
return color != null
? color.color
: 0;
}
@Override
public void apply(
@NonNull String language,
@NonNull Prism4j.Syntax syntax,
@NonNull SpannableBuilder builder,
int start,
int end) {
final String type = syntax.type();
final String alias = syntax.alias();
final int color = color(language, type, alias);
if (color != 0) {
builder.setSpan(new ForegroundColorSpan(color), start, end);
applyColor(language, type, alias, color, builder, start, end);
}
}
@SuppressWarnings("unused")
protected void applyColor(
@NonNull String language,
@NonNull String type,
@Nullable String alias,
@ColorInt int color,
@NonNull SpannableBuilder builder,
int start,
int end) {
builder.setSpan(new ForegroundColorSpan(color), start, end);
}
protected static class Color {
@NonNull
public static Color of(@ColorInt int color) {
return new Color(color);
}
@ColorInt
protected final int color;
protected Color(@ColorInt int color) {
this.color = color;
}
}
protected static class ColorHashMap extends HashMap<String, Color> {
@NonNull
protected ColorHashMap add(@ColorInt int color, String name) {
put(name, Color.of(color));
return this;
}
@NonNull
protected ColorHashMap add(
@ColorInt int color,
@NonNull String name1,
@NonNull String name2) {
final Color c = Color.of(color);
put(name1, c);
put(name2, c);
return this;
}
@NonNull
protected ColorHashMap add(
@ColorInt int color,
@NonNull String name1,
@NonNull String name2,
@NonNull String name3) {
final Color c = Color.of(color);
put(name1, c);
put(name2, c);
put(name3, c);
return this;
}
@NonNull
protected ColorHashMap add(@ColorInt int color, String... names) {
final Color c = Color.of(color);
for (String name : names) {
put(name, c);
}
return this;
}
}
}

64
library-syntax/src/main/java/ru/noties/markwon/syntax/Prism4jThemeDefault.java Normal file
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package ru.noties.markwon.syntax;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.style.BackgroundColorSpan;
import ru.noties.markwon.SpannableBuilder;
import ru.noties.markwon.spans.EmphasisSpan;
import ru.noties.markwon.spans.StrongEmphasisSpan;
public class Prism4jThemeDefault extends Prism4jThemeBase {
@NonNull
public static Prism4jThemeDefault create() {
return new Prism4jThemeDefault();
}
@NonNull
@Override
protected ColorHashMap init() {
return new ColorHashMap()
.add(0xFF708090, "comment", "prolog", "doctype", "cdata")
.add(0xFF999999, "punctuation")
.add(0xFF990055, "property", "tag", "boolean", "number", "constant", "symbol", "deleted")
.add(0xFF669900, "selector", "attr-name", "string", "char", "builtin", "inserted")
.add(0xFF9a6e3a, "operator", "entity", "url")
.add(0xFF0077aa, "atrule", "attr-value", "keyword")
.add(0xFFDD4A68, "function", "class-name")
.add(0xFFee9900, "regex", "important", "variable");
}
@Override
protected void applyColor(
@NonNull String language,
@NonNull String type,
@Nullable String alias,
@ColorInt int color,
@NonNull SpannableBuilder builder,
int start,
int end) {
if ("css".equals(language) && isOfType("string", type, alias)) {
super.applyColor(language, type, alias, 0xFF9a6e3a, builder, start, end);
builder.setSpan(new BackgroundColorSpan(0x80ffffff), start, end);
return;
}
if (isOfType("namespace", type, alias)) {
color = applyAlpha(.7F, color);
}
super.applyColor(language, type, alias, color, builder, start, end);
if (isOfType("important", type, alias)
|| isOfType("bold", type, alias)) {
builder.setSpan(new StrongEmphasisSpan(), start, end);
}
if (isOfType("italic", type, alias)) {
builder.setSpan(new EmphasisSpan(), start, end);
}
}
}