Merge branch 'feature/extend_heading_formatting'

app/build.gradle

@@ -36,4 +36,6 @@ dependencies {
 
     compile 'com.google.dagger:dagger:2.10'
     annotationProcessor 'com.google.dagger:dagger-compiler:2.10'
+
+    implementation "com.android.support:appcompat-v7:27.0.2"
 }

app/src/main/java/ru/noties/markwon/MarkdownRenderer.java

@@ -1,11 +1,15 @@
 package ru.noties.markwon;
 
 import android.content.Context;
+import android.graphics.Color;
+import android.graphics.Typeface;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.SystemClock;
+import android.support.annotation.FontRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v4.content.res.ResourcesCompat;
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Future;
@@ -14,13 +18,14 @@ import javax.inject.Inject;
 
 import ru.noties.debug.Debug;
 import ru.noties.markwon.spans.AsyncDrawable;
+import ru.noties.markwon.spans.SpannableTheme;
+import ru.noties.markwon.spans.heading.HeadingConfig;
+import ru.noties.markwon.spans.heading.HeadingTypeConfig;
 
 @ActivityScope
 public class MarkdownRenderer {
 
-    interface MarkdownReadyListener {
-        void onMarkdownReady(CharSequence markdown);
-    }
+    private final Context context;
 
     @Inject
     AsyncDrawable.Loader loader;
@@ -34,14 +39,15 @@ public class MarkdownRenderer {
     private Future<?> task;
 
     @Inject
-    MarkdownRenderer() {
+    MarkdownRenderer(Context context) {
+        this.context = context;
     }
 
     public void render(
-            @NonNull final Context context,
-            @Nullable final Uri uri,
-            @NonNull final String markdown,
-            @NonNull final MarkdownReadyListener listener) {
+        @NonNull final Context context,
+        @Nullable final Uri uri,
+        @NonNull final String markdown,
+        @NonNull final MarkdownReadyListener listener) {
         cancel();
         task = service.submit(new Runnable() {
             @Override
@@ -55,9 +61,10 @@ public class MarkdownRenderer {
                 }
 
                 final SpannableConfiguration configuration = SpannableConfiguration.builder(context)
-                        .asyncDrawableLoader(loader)
-                        .urlProcessor(urlProcessor)
-                        .build();
+                    .theme(getSpannableTheme())
+                    .asyncDrawableLoader(loader)
+                    .urlProcessor(urlProcessor)
+                    .build();
 
                 final long start = SystemClock.uptimeMillis();
 
@@ -92,4 +99,25 @@ public class MarkdownRenderer {
     private boolean isCancelled() {
         return task == null || task.isCancelled();
     }
+
+    private HeadingConfig getHeadingConfig() {
+        final HeadingTypeConfig h1 = new HeadingTypeConfig(-1, Color.RED, getTypeface(R.font.opensans_semibold));
+        final HeadingTypeConfig h2 = new HeadingTypeConfig(-1, Color.BLUE, getTypeface(R.font.opensans_regular));
+
+        return new HeadingConfig(h1, h2);
+    }
+
+    private SpannableTheme getSpannableTheme() {
+        return SpannableTheme.builderWithDefaults(context)
+            .headingConfig(getHeadingConfig(), context.getResources().getDisplayMetrics().density)
+            .build();
+    }
+
+    private Typeface getTypeface(@FontRes int font){
+        return ResourcesCompat.getFont(context, font);
+    }
+
+    interface MarkdownReadyListener {
+        void onMarkdownReady(CharSequence markdown);
+    }
 }

app/src/main/res/font/app_font.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<font-family
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <!-- Regular -->
+    <font
+        android:font="@font/opensans_regular"
+        android:fontStyle="normal"
+        android:fontWeight="400"
+
+        app:font="@font/opensans_regular"
+        app:fontStyle="normal"
+        app:fontWeight="400"/>
+
+    <!-- Semi-bold -->
+    <font
+        android:font="@font/opensans_semibold"
+        android:fontStyle="normal"
+        android:fontWeight="700"
+
+        app:font="@font/opensans_semibold"
+        app:fontStyle="normal"
+        app:fontWeight="700"/>
+</font-family>

library/src/main/java/ru/noties/markwon/spans/HeadingSpan.java

@@ -10,12 +10,14 @@ import android.text.TextPaint;
 import android.text.style.LeadingMarginSpan;
 import android.text.style.MetricAffectingSpan;
 
+import ru.noties.markwon.spans.heading.HeadingType;
+
 public class HeadingSpan extends MetricAffectingSpan implements LeadingMarginSpan {
 
     private final SpannableTheme theme;
     private final Rect rect = ObjectsPool.rect();
     private final Paint paint = ObjectsPool.paint();
-    private final int level;
+    @HeadingType private final int level;
 
     public HeadingSpan(@NonNull SpannableTheme theme, @IntRange(from = 1, to = 6) int level) {
         this.theme = theme;

library/src/main/java/ru/noties/markwon/spans/SpannableTheme.java

@@ -9,12 +9,15 @@ import android.support.annotation.AttrRes;
 import android.support.annotation.ColorInt;
 import android.support.annotation.Dimension;
 import android.support.annotation.FloatRange;
-import android.support.annotation.IntRange;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.text.TextPaint;
 import android.util.TypedValue;
 
+import ru.noties.markwon.spans.heading.HeadingConfig;
+import ru.noties.markwon.spans.heading.HeadingType;
+import ru.noties.markwon.spans.heading.HeadingTypeConfig;
+
 @SuppressWarnings("WeakerAccess")
 public class SpannableTheme {
 
@@ -78,16 +81,16 @@ public class SpannableTheme {
 
         final Dip dip = new Dip(context);
         return new Builder()
-                .linkColor(linkColor)
-                .codeMultilineMargin(dip.toPx(8))
-                .blockMargin(dip.toPx(24))
-                .blockQuoteWidth(dip.toPx(4))
-                .bulletListItemStrokeWidth(dip.toPx(1))
-                .headingBreakHeight(dip.toPx(1))
-                .thematicBreakHeight(dip.toPx(4))
-                .tableCellPadding(dip.toPx(4))
-                .tableBorderWidth(dip.toPx(1))
-                .taskListDrawable(new TaskListDrawable(linkColor, linkColor, backgroundColor));
+            .linkColor(linkColor)
+            .codeMultilineMargin(dip.toPx(8))
+            .blockMargin(dip.toPx(24))
+            .blockQuoteWidth(dip.toPx(4))
+            .bulletListItemStrokeWidth(dip.toPx(1))
+            .headingConfig(new HeadingConfig(), dip.density)
+            .thematicBreakHeight(dip.toPx(4))
+            .tableCellPadding(dip.toPx(4))
+            .tableBorderWidth(dip.toPx(1))
+            .taskListDrawable(new TaskListDrawable(linkColor, linkColor, backgroundColor));
     }
 
     private static int resolve(Context context, @AttrRes int attr) {
@@ -104,6 +107,7 @@ public class SpannableTheme {
     protected static final int BLOCK_QUOTE_DEF_COLOR_ALPHA = 25;
 
     protected static final int CODE_DEF_BACKGROUND_COLOR_ALPHA = 25;
+
     protected static final float CODE_DEF_TEXT_SIZE_RATIO = .87F;
 
     protected static final int HEADING_DEF_BREAK_COLOR_ALPHA = 75;
@@ -111,7 +115,7 @@ public class SpannableTheme {
     // taken from html spec (most browsers render headings like that)
     // is not exposed via protected modifier in order to disallow modification
     private static final float[] HEADING_SIZES = {
-            2.F, 1.5F, 1.17F, 1.F, .83F, .67F,
+        2.F, 1.5F, 1.17F, 1.F, .83F, .67F,
     };
 
     protected static final float SCRIPT_DEF_TEXT_SIZE_RATIO = .75F;
@@ -159,11 +163,7 @@ public class SpannableTheme {
     // applied ONLY if default typeface was used, otherwise, not applied
     protected final int codeTextSize;
 
-    // by default paint.getStrokeWidth
-    protected final int headingBreakHeight;
-
-    // by default, text color with `HEADING_DEF_BREAK_COLOR_ALPHA` applied alpha
-    protected final int headingBreakColor;
+    protected final HeadingConfig headingConfig;
 
     // by default `SCRIPT_DEF_TEXT_SIZE_RATIO`
     protected final float scriptTextSizeRatio;
@@ -202,8 +202,7 @@ public class SpannableTheme {
         this.codeMultilineMargin = builder.codeMultilineMargin;
         this.codeTypeface = builder.codeTypeface;
         this.codeTextSize = builder.codeTextSize;
-        this.headingBreakHeight = builder.headingBreakHeight;
-        this.headingBreakColor = builder.headingBreakColor;
+        this.headingConfig = builder.headingConfig;
         this.scriptTextSizeRatio = builder.scriptTextSizeRatio;
         this.thematicBreakColor = builder.thematicBreakColor;
         this.thematicBreakHeight = builder.thematicBreakHeight;
@@ -214,7 +213,6 @@ public class SpannableTheme {
         this.taskListDrawable = builder.taskListDrawable;
     }
 
-
     public void applyLinkStyle(@NonNull Paint paint) {
         paint.setUnderlineText(true);
         if (linkColor != 0) {
@@ -269,7 +267,7 @@ public class SpannableTheme {
 
         final int width;
         if (bulletWidth == 0
-                || bulletWidth > min) {
+            || bulletWidth > min) {
             width = min;
         } else {
             width = bulletWidth;
@@ -322,13 +320,51 @@ public class SpannableTheme {
         return color;
     }
 
-    public void applyHeadingTextStyle(@NonNull Paint paint, @IntRange(from = 1, to = 6) int level) {
+    public void applyHeadingTextStyle(@NonNull Paint paint, @HeadingType int level) {
+        HeadingTypeConfig headingTypeConfig;
+        switch (level) {
+            case HeadingType.H1:
+                headingTypeConfig = headingConfig.getH1Config();
+                break;
+            case HeadingType.H2:
+                headingTypeConfig = headingConfig.getH2Config();
+                break;
+            case HeadingType.H3:
+                headingTypeConfig = headingConfig.getH3Config();
+                break;
+            case HeadingType.H4:
+                headingTypeConfig = headingConfig.getH4Config();
+                break;
+            case HeadingType.H5:
+                headingTypeConfig = headingConfig.getH5Config();
+                break;
+            case HeadingType.H6:
+                headingTypeConfig = headingConfig.getH6Config();
+                break;
+            default:
+                headingTypeConfig = new HeadingTypeConfig();
+        }
+
         paint.setFakeBoldText(true);
-        paint.setTextSize(paint.getTextSize() * HEADING_SIZES[level - 1]);
+
+        final float textSize = headingTypeConfig.getTextSize() > 0 ?
+            headingTypeConfig.getTextSize() : HEADING_SIZES[level - 1];
+        paint.setTextSize(paint.getTextSize() * textSize);
+
+        final int textColor = headingTypeConfig.getTextColor();
+        if (textColor != -1) {
+            paint.setColor(textColor);
+        }
+
+        final Typeface typeface = headingTypeConfig.getTypeface();
+        if(typeface != null){
+            paint.setTypeface(typeface);
+        }
     }
 
     public void applyHeadingBreakStyle(@NonNull Paint paint) {
         final int color;
+        final int headingBreakColor = headingConfig.getHeadingBreakConfig().getHeadingBreakColor();
         if (headingBreakColor != 0) {
             color = headingBreakColor;
         } else {
@@ -336,6 +372,7 @@ public class SpannableTheme {
         }
         paint.setColor(color);
         paint.setStyle(Paint.Style.FILL);
+        final float headingBreakHeight = headingConfig.getHeadingBreakConfig().getHeadingBreakStrokeWidth();
         if (headingBreakHeight >= 0) {
             //noinspection SuspiciousNameCombination
             paint.setStrokeWidth(headingBreakHeight);
@@ -441,8 +478,7 @@ public class SpannableTheme {
         private int codeMultilineMargin;
         private Typeface codeTypeface;
         private int codeTextSize;
-        private int headingBreakHeight = -1;
-        private int headingBreakColor;
+        private HeadingConfig headingConfig;
         private float scriptTextSizeRatio;
         private int thematicBreakColor;
         private int thematicBreakHeight = -1;
@@ -468,8 +504,7 @@ public class SpannableTheme {
             this.codeMultilineMargin = theme.codeMultilineMargin;
             this.codeTypeface = theme.codeTypeface;
             this.codeTextSize = theme.codeTextSize;
-            this.headingBreakHeight = theme.headingBreakHeight;
-            this.headingBreakColor = theme.headingBreakColor;
+            this.headingConfig = theme.headingConfig;
             this.scriptTextSizeRatio = theme.scriptTextSizeRatio;
             this.thematicBreakColor = theme.thematicBreakColor;
             this.thematicBreakHeight = theme.thematicBreakHeight;
@@ -553,14 +588,9 @@ public class SpannableTheme {
         }
 
         @NonNull
-        public Builder headingBreakHeight(@Dimension int headingBreakHeight) {
-            this.headingBreakHeight = headingBreakHeight;
-            return this;
-        }
-
-        @NonNull
-        public Builder headingBreakColor(@ColorInt int headingBreakColor) {
-            this.headingBreakColor = headingBreakColor;
+        public Builder headingConfig(HeadingConfig headingConfig, float density) {
+            headingConfig.setDensityFactor(density);
+            this.headingConfig = headingConfig;
             return this;
         }
 
@@ -630,7 +660,7 @@ public class SpannableTheme {
 
     private static class Dip {
 
-        private final float density;
+        protected final float density;
 
         Dip(@NonNull Context context) {
             this.density = context.getResources().getDisplayMetrics().density;

library/src/main/java/ru/noties/markwon/spans/heading/HeadingConfig.kt

@@ -0,0 +1,83 @@
+package ru.noties.markwon.spans.heading
+
+import android.graphics.Typeface
+import android.support.annotation.ColorInt
+import android.support.annotation.Dimension
+
+/**
+ * Configuration for heading type (H1, H2, ..., H6)
+ *
+ * Can define different configurations for all six types of headings,
+ * plus an extra configuration for the line breaks (only applies to H1 and H2)
+ *
+ * @property h1Config Config for H1 heading
+ * @property h2Config Config for H2 heading
+ * @property h3Config Config for H3 heading
+ * @property h4Config Config for H4 heading
+ * @property h5Config Config for H5 heading
+ * @property h6Config Config for H6 heading
+ * @property headingBreakConfig Config for line breaks (for H1 and H2)
+ */
+data class HeadingConfig @JvmOverloads constructor(
+        val h1Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val h2Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val h3Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val h4Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val h5Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val h6Config: HeadingTypeConfig = HeadingTypeConfig(),
+        val headingBreakConfig: HeadingBreakConfig = HeadingBreakConfig()
+) {
+    fun setDensityFactor(factor: Float) {
+        h1Config.densityFactor = factor
+        h2Config.densityFactor = factor
+        h3Config.densityFactor = factor
+        h4Config.densityFactor = factor
+        h5Config.densityFactor = factor
+        h6Config.densityFactor = factor
+        headingBreakConfig.densityFactor = factor
+    }
+}
+
+/**
+ * Configuration for given heading type (H1, H2, ..., H6)
+ *
+ * Can set text size, text color and font (typeface)
+ *
+ * @property textSize Text size for heading
+ * @property textColor Text color for heading
+ * @property typeface Text size for heading
+ */
+class HeadingTypeConfig @JvmOverloads constructor(
+        //Standard sizes available at #SpannableTheme.java:HEADING_SIZES
+        textSize: Float = -1F,
+
+        @ColorInt val textColor: Int = -1,
+
+        val typeface: Typeface? = null
+) {
+    internal var densityFactor: Float = -1F
+
+    val textSize: Float = textSize
+        get() = field * densityFactor
+}
+
+/**
+ * Configuration for given heading type (H1, H2, ..., H6)
+ *
+ * Can set text size, text color and font (typeface)
+ *
+ * @property headingBreakStrokeWidth Stroke width for heading's line break
+ * @property headingBreakColor Color for heading's line break
+ */
+class HeadingBreakConfig @JvmOverloads constructor(
+        // by default paint.getStrokeWidth
+        @Dimension headingBreakStrokeWidth: Int = -1,
+
+        // by default, text color with `HEADING_DEF_BREAK_COLOR_ALPHA` applied alpha
+        @ColorInt val headingBreakColor: Int = 0
+) {
+    internal var densityFactor: Float = -1F
+
+    val headingBreakStrokeWidth: Float = headingBreakStrokeWidth.toFloat()
+        get() = field * densityFactor
+}

library/src/main/java/ru/noties/markwon/spans/heading/HeadingType.java

@@ -0,0 +1,27 @@
+package ru.noties.markwon.spans.heading;
+
+import android.support.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import static ru.noties.markwon.spans.heading.HeadingType.H1;
+import static ru.noties.markwon.spans.heading.HeadingType.H2;
+import static ru.noties.markwon.spans.heading.HeadingType.H3;
+import static ru.noties.markwon.spans.heading.HeadingType.H4;
+import static ru.noties.markwon.spans.heading.HeadingType.H5;
+import static ru.noties.markwon.spans.heading.HeadingType.H6;
+
+/**
+ * Created by daniel.leal on 13.12.17.
+ */
+@Retention(RetentionPolicy.SOURCE)
+@IntDef({H1, H2, H3, H4, H5, H6})
+public @interface HeadingType {
+    int H1 = 1;
+    int H2 = 2;
+    int H3 = 3;
+    int H4 = 4;
+    int H5 = 5;
+    int H6 = 6;
+}