Add the ability to use custom fonts with TextViewEx

OsmAnd-telegram/.gitignore

@@ -12,6 +12,7 @@ obj/
 out/
 use/
 src/org/drinkless/td/
+assets/fonts/*
 
 # Android Studio
 /.idea

OsmAnd-telegram/build.gradle

@@ -111,10 +111,19 @@ task downloadPrebuiltTelegram {
 	dependsOn downloadTdLibzip, copyNativeLibs, copyJavaSources
 }
 
+task collectFonts(type: Copy) {
+	from "../../resources/fonts"
+	into "assets/fonts"
+	include "*.ttf"
+}
+
+task collectExternalResources {
+	dependsOn collectFonts
+}
 
 afterEvaluate {
 	android.applicationVariants.all { variant ->
-		variant.javaCompiler.dependsOn(downloadPrebuiltTelegram)
+		variant.javaCompiler.dependsOn(downloadPrebuiltTelegram, collectExternalResources)
 		variant.preBuild.dependsOn(downloadPrebuiltTelegram)
 	}
 }

OsmAnd-telegram/res/values/attrs.xml

@@ -12,4 +12,8 @@
 		<attr name="primary_btn_text_color" format="reference" />
 		<attr name="secondary_btn_bg" format="reference" />
 	</declare-styleable>
+
+	<declare-styleable name="TextViewEx">
+		<attr name="typeface" format="reference|string" />
+	</declare-styleable>
 </resources>

OsmAnd-telegram/res/values/fonts.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+	<string name="font_roboto_regular">fonts/Roboto-Regular.ttf</string>
+	<string name="font_roboto_medium">fonts/Roboto-Medium.ttf</string>
+</resources>

OsmAnd-telegram/src/net/osmand/telegram/helpers/FontCache.kt

@@ -0,0 +1,45 @@
+package net.osmand.telegram.helpers
+
+import android.content.Context
+import android.graphics.Typeface
+import android.util.Log
+import java.util.concurrent.ConcurrentHashMap
+
+private const val TAG = "FontCache"
+private const val ROBOTO_MEDIUM = "fonts/Roboto-Medium.ttf"
+private const val ROBOTO_REGULAR = "fonts/Roboto-Regular.ttf"
+
+object FontCache {
+
+	private val fontsMap = ConcurrentHashMap<String, Typeface>()
+
+	fun getRobotoMedium(context: Context): Typeface? {
+		return getFont(context, ROBOTO_MEDIUM)
+	}
+
+	fun getRobotoRegular(context: Context): Typeface? {
+		return getFont(context, ROBOTO_REGULAR)
+	}
+
+	fun getFont(context: Context, fontName: String): Typeface? {
+		var typeface: Typeface? = fontsMap[fontName]
+		if (typeface != null) {
+			return typeface
+		}
+
+		try {
+			typeface = Typeface.createFromAsset(context.assets, fontName)
+		} catch (e: Exception) {
+			Log.e(TAG, "Failed to create typeface from asset '$fontName'", e)
+			return null
+		}
+
+		if (typeface == null) {
+			return null
+		}
+
+		fontsMap[fontName] = typeface
+
+		return typeface
+	}
+}

OsmAnd-telegram/src/net/osmand/telegram/ui/views/TextViewEx.kt

@@ -0,0 +1,49 @@
+package net.osmand.telegram.ui.views
+
+import android.content.Context
+import android.content.res.TypedArray
+import android.support.v7.widget.AppCompatTextView
+import android.util.AttributeSet
+import net.osmand.telegram.R
+import net.osmand.telegram.helpers.FontCache
+
+class TextViewEx : AppCompatTextView {
+
+	constructor(context: Context) : super(context)
+
+	constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) {
+		parseAttrs(attrs, 0)
+	}
+
+	constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(
+		context,
+		attrs,
+		defStyleAttr
+	) {
+		parseAttrs(attrs, defStyleAttr)
+	}
+
+	private fun parseAttrs(attrs: AttributeSet?, defStyleAttr: Int) {
+		if (attrs == null) {
+			return
+		}
+
+		val resolvedAttrs =
+			context.theme.obtainStyledAttributes(attrs, R.styleable.TextViewEx, defStyleAttr, 0)
+		applyAttrTypeface(resolvedAttrs)
+		resolvedAttrs.recycle()
+	}
+
+	private fun applyAttrTypeface(resolvedAttrs: TypedArray) {
+		if (isInEditMode || !resolvedAttrs.hasValue(R.styleable.TextViewEx_typeface)) {
+			return
+		}
+
+		val typefaceName = resolvedAttrs.getString(R.styleable.TextViewEx_typeface)
+		val typeface = FontCache.getFont(context, typefaceName)
+		if (typeface != null) {
+			val style = getTypeface()?.style ?: 0
+			setTypeface(typeface, style)
+		}
+	}
+}