Added an option to programmatically set modifier.

Author: khaykov

aztec/src/main/kotlin/org/wordpress/aztec/AztecText.kt

@@ -632,6 +632,15 @@ open class AztecText : AppCompatEditText, TextWatcher, UnknownHtmlSpan.OnUnknown
         isViewInitialized = true
     }
 
+    fun setTextSizeModifier(textSizeModifierPx: Int) {
+        blockFormatter.setTextSizeModifier(textSizeModifierPx)
+        if (textSize + textSizeModifierPx >= 0) {
+            setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize + textSizeModifierPx)
+        } else {
+            setTextSize(TypedValue.COMPLEX_UNIT_PX, 0f)
+        }
+    }
+
     private fun <T> selectionHasExactlyOneMarker(start: Int, end: Int, type: Class<T>): Boolean {
         val spanFound: Array<T> = editableText.getSpans(
                 start,

aztec/src/main/kotlin/org/wordpress/aztec/formatting/BlockFormatter.kt

@@ -62,10 +62,10 @@ class BlockFormatter(editor: AztecText,
     }
 
     data class QuoteStyle(val quoteBackground: Int, val quoteColor: Int, val quoteTextColor: Int, val quoteBackgroundAlpha: Float, val quoteMargin: Int, val quotePadding: Int, val quoteWidth: Int, val verticalPadding: Int)
-    data class PreformatStyle(val preformatBackground: Int, val preformatBackgroundAlpha: Float, val preformatColor: Int, val verticalPadding: Int, val leadingMargin: Int, val preformatBorderColor: Int, val preformatBorderRadius: Int, val preformatBorderThickness: Int, val preformatTextSize: Int)
+    data class PreformatStyle(val preformatBackground: Int, val preformatBackgroundAlpha: Float, val preformatColor: Int, val verticalPadding: Int, val leadingMargin: Int, val preformatBorderColor: Int, val preformatBorderRadius: Int, val preformatBorderThickness: Int, var preformatTextSize: Int)
     data class ListItemStyle(val strikeThroughCheckedItems: Boolean, val checkedItemsTextColor: Int)
     data class HeaderStyles(val verticalPadding: Int, val styles: Map<AztecHeadingSpan.Heading, HeadingStyle>) {
-        data class HeadingStyle(val fontSize: Int, val fontSizeModifier: Int, val fontColor: Int)
+        data class HeadingStyle(val fontSize: Int, var fontSizeModifier: Int, val fontColor: Int)
     }
     data class ExclusiveBlockStyles(val enabled: Boolean = false, val verticalParagraphMargin: Int)
     data class ParagraphStyle(val verticalMargin: Int)
@@ -1251,4 +1251,11 @@ class BlockFormatter(editor: AztecText,
             }
         }
     }
+
+    fun setTextSizeModifier(modifier: Int){
+        headerStyle.styles.forEach {
+            it.value.fontSizeModifier = modifier
+        }
+        preformatStyle.preformatTextSize += modifier
+    }
 }

aztec/src/main/kotlin/org/wordpress/aztec/spans/AztecHeadingSpan.kt

@@ -172,7 +172,7 @@ open class AztecHeadingSpan(
                 }
             }
             is HeadingSize.Size -> {
-                textPaint.textSize = headingSize.value.toFloat() + getSizeModifier()
+                textPaint.textSize = headingSize.value.toFloat()
             }
         }
         textPaint.isFakeBoldText = true
@@ -192,6 +192,11 @@ open class AztecHeadingSpan(
         when (headingSize) {
             is HeadingSize.Scale -> {
                 paint.textSize *= heading.scale
+                if (paint.textSize + getSizeModifier() >= 0) {
+                    paint.textSize += getSizeModifier()
+                } else {
+                    paint.textSize = 0f
+                }
             }
             is HeadingSize.Size -> {
                 paint.textSize = headingSize.value.toFloat()
@@ -203,7 +208,7 @@ open class AztecHeadingSpan(
     }
 
     private fun getHeadingSize(): HeadingSize {
-        return headerStyle.styles[heading]?.fontSize?.takeIf { it > 0 }?.let { HeadingSize.Size(it) }
+        return headerStyle.styles[heading]?.fontSize?.takeIf { it > 0 }?.let { HeadingSize.Size(it + getSizeModifier()) }
                 ?: HeadingSize.Scale(heading.scale)
     }