Add image descriptions indicator (#697)

* Add image descriptions indicator. Closes #683

* Add bg for description indicator, change symbol

* Use icon for image description indicator

app/src/main/java/com/keylesspalace/tusky/ComposeActivity.java

@@ -1134,6 +1134,7 @@ public final class ComposeActivity
                             Attachment attachment = response.body();
                             if (response.isSuccessful() && attachment != null) {
                                 item.description = attachment.getDescription();
+                                item.preview.setChecked(item.description != null && !item.description.isEmpty());
                                 dialog.dismiss();
                             } else {
                                 showFailedCaptionMessage();

app/src/main/java/com/keylesspalace/tusky/view/ProgressImageView.java

@@ -22,8 +22,11 @@ import android.graphics.Paint;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.RectF;
+import android.graphics.drawable.Drawable;
 import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
+import android.support.v4.graphics.drawable.DrawableCompat;
+import android.support.v7.content.res.AppCompatResources;
 import android.support.v7.widget.AppCompatImageView;
 import android.util.AttributeSet;
 
@@ -33,10 +36,12 @@ import at.connyduck.sparkbutton.helpers.Utils;
 public final class ProgressImageView extends AppCompatImageView {
 
     private int progress = -1;
-    private RectF progressRect = new RectF();
-    private RectF biggerRect = new RectF();
-    private Paint circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-    private Paint clearPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final RectF progressRect = new RectF();
+    private final RectF biggerRect = new RectF();
+    private final Paint circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint clearPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private final Paint markBgPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+    private Drawable captionDrawable;
 
     public ProgressImageView(Context context) {
         super(context);
@@ -59,6 +64,11 @@ public final class ProgressImageView extends AppCompatImageView {
         circlePaint.setStyle(Paint.Style.STROKE);
 
         clearPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
+
+        markBgPaint.setStyle(Paint.Style.FILL);
+        markBgPaint.setColor(ContextCompat.getColor(getContext(),
+                R.color.description_marker_unselected));
+        captionDrawable = AppCompatResources.getDrawable(getContext(), R.drawable.spellcheck);
     }
 
     public void setProgress(int progress) {
@@ -71,12 +81,15 @@ public final class ProgressImageView extends AppCompatImageView {
         invalidate();
     }
 
+    public void setChecked(boolean checked) {
+        this.markBgPaint.setColor(ContextCompat.getColor(getContext(),
+                checked ? R.color.colorPrimary : R.color.description_marker_unselected));
+        invalidate();
+    }
+
     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
-        if (progress == -1) {
-            return;
-        }
 
         float angle = (progress / 100f) * 360 - 90;
         float halfWidth = canvas.getWidth() / 2;
@@ -86,8 +99,25 @@ public final class ProgressImageView extends AppCompatImageView {
         int margin = 8;
         biggerRect.set(progressRect.left - margin, progressRect.top - margin, progressRect.right + margin, progressRect.bottom + margin);
         canvas.saveLayer(biggerRect, null, Canvas.ALL_SAVE_FLAG);
+        if (progress != -1) {
             canvas.drawOval(progressRect, circlePaint);
             canvas.drawArc(biggerRect, angle, 360 - angle - 90, true, clearPaint);
+        }
         canvas.restore();
+
+        int circleRadius = Utils.dpToPx(getContext(), 14);
+        int circleMargin = Utils.dpToPx(getContext(), 14);
+
+        int circleY = canvas.getHeight() - circleMargin - circleRadius / 2;
+        int circleX = canvas.getWidth() - circleMargin - circleRadius / 2;
+
+        canvas.drawCircle(circleX, circleY, circleRadius, markBgPaint);
+
+        captionDrawable.setBounds(canvas.getWidth() - circleMargin - circleRadius,
+                canvas.getHeight() - circleMargin - circleRadius,
+                canvas.getWidth() - circleMargin,
+                canvas.getHeight() - circleMargin);
+        DrawableCompat.setTint(captionDrawable, Color.WHITE);
+        captionDrawable.draw(canvas);
     }
 }

app/src/main/res/drawable/spellcheck.xml

@@ -0,0 +1,8 @@
+<!-- drawable/spellcheck.xml -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#000" android:pathData="M21.59,11.59L13.5,19.68L9.83,16L8.42,17.41L13.5,22.5L23,13M6.43,11L8.5,5.5L10.57,11M12.45,16H14.54L9.43,3H7.57L2.46,16H4.55L5.67,13H11.31L12.45,16Z" />
+</vector>

app/src/main/res/values/colors.xml

@@ -5,6 +5,7 @@
     <color name="toolbar_view_media">#8f000000</color>
     <color name="semi_transparent">#33000000</color>
     <color name="header_background_filter">#44000000</color>
+    <color name="description_marker_unselected">#333</color>
 
     <!--Dark Theme Colors-->
     <color name="color_primary_dark">#4c5368</color>