Change spoiler bg colors

vector/src/main/java/im/vector/riotx/features/html/SpanHandler.kt

@@ -28,7 +28,8 @@ class SpanHandler(context: Context) : TagHandler() {
 
     override fun supportedTags() = listOf("span")
 
-    private val spoilerBgColor: Int = ThemeUtils.getColor(context, R.attr.vctr_markdown_block_background_color)
+    private val spoilerBgColorHidden: Int = ThemeUtils.getColor(context, R.attr.vctr_spoiler_background_color)
+    private val spoilerBgColorRevealed: Int = ThemeUtils.getColor(context, R.attr.vctr_markdown_block_background_color)
 
     private val textColor: Int = ThemeUtils.getColor(context, R.attr.riotx_text_primary)
 
@@ -37,7 +38,7 @@ class SpanHandler(context: Context) : TagHandler() {
         if (mxSpoiler != null) {
             SpannableBuilder.setSpans(
                     visitor.builder(),
-                    SpoilerSpan(spoilerBgColor, textColor),
+                    SpoilerSpan(spoilerBgColorHidden, spoilerBgColorRevealed, textColor),
                     tag.start(),
                     tag.end()
             )

vector/src/main/java/im/vector/riotx/features/html/SpoilerSpan.kt

@@ -21,7 +21,9 @@ import android.text.TextPaint
 import android.text.style.ClickableSpan
 import android.view.View
 
-class SpoilerSpan(private val bgColor: Int, private val textColor: Int) : ClickableSpan() {
+class SpoilerSpan(private val bgColorHidden: Int,
+                  private val bgColorRevealed: Int,
+                  private val textColor: Int) : ClickableSpan() {
 
     override fun onClick(widget: View) {
         isHidden = !isHidden
@@ -31,10 +33,11 @@ class SpoilerSpan(private val bgColor: Int, private val textColor: Int) : Clicka
     private var isHidden = true
 
     override fun updateDrawState(tp: TextPaint) {
-        tp.bgColor = bgColor
         if (isHidden) {
+            tp.bgColor = bgColorHidden
             tp.color = Color.TRANSPARENT
         } else {
+            tp.bgColor = bgColorRevealed
             tp.color = textColor
         }
     }

vector/src/main/res/values/attrs.xml

@@ -34,6 +34,7 @@
         <attr name="vctr_unread_marker_line_color" format="color" />
         <attr name="vctr_markdown_block_background_color" format="color" />
         <attr name="vctr_room_activity_divider_color" format="color" />
+        <attr name="vctr_spoiler_background_color" format="color" />
 
         <!-- tab bar colors -->
         <attr name="vctr_tab_bar_inverted_background_color" format="color" />

vector/src/main/res/values/theme_dark.xml

@@ -101,6 +101,7 @@
         <item name="vctr_search_mode_room_name_text_color">#CCC3C3C3</item>
         <item name="vctr_unread_marker_line_color">@color/accent_color_dark</item>
         <item name="vctr_markdown_block_background_color">@android:color/black</item>
+        <item name="vctr_spoiler_background_color">#FFFFFFFF</item>
         <item name="vctr_room_activity_divider_color">#565656</item>
 
         <!-- tab bar colors -->

vector/src/main/res/values/theme_light.xml

@@ -101,6 +101,7 @@
         <item name="vctr_search_mode_room_name_text_color">#333C3C3C</item>
         <item name="vctr_unread_marker_line_color">@color/accent_color_light</item>
         <item name="vctr_markdown_block_background_color">#FFEEEEEE</item>
+        <item name="vctr_spoiler_background_color">#FF000000</item>
         <item name="vctr_room_activity_divider_color">#FFF2F2F2</item>
 
         <!-- tab bar colors -->