Image Editor - Remove initial text.

- Flashing cursor.

res/values/strings.xml

@@ -623,8 +623,6 @@
     <!-- ScribbleActivity -->
     <string name="ScribbleActivity_save_failure">Failed to save image changes</string>
 
-    <string name="ImageEditorFragment_initial_text">Signal</string>
-
     <!-- Search -->
     <string name="SearchFragment_no_results">No results found for \'%s\'</string>
     <string name="SearchFragment_header_conversations">Conversations</string>

src/org/thoughtcrime/securesms/imageeditor/renderers/TextRenderer.java

@@ -1,5 +1,6 @@
 package org.thoughtcrime.securesms.imageeditor.renderers;
 
+import android.animation.ValueAnimator;
 import android.graphics.Canvas;
 import android.graphics.Matrix;
 import android.graphics.Paint;
@@ -10,6 +11,7 @@ import android.os.Parcel;
 import android.support.annotation.ColorInt;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.view.animation.Interpolator;
 
 import org.thoughtcrime.securesms.imageeditor.Bounds;
 import org.thoughtcrime.securesms.imageeditor.ColorableRenderer;
@@ -43,6 +45,9 @@ public final class TextRenderer extends InvalidateableRenderer implements Colora
   private int     selEnd;
   private boolean hasFocus;
 
+  private ValueAnimator cursorAnimator;
+  private float         cursorAnimatedValue;
+
   public TextRenderer(@Nullable String text, @ColorInt int color) {
     setColor(color);
     float regularTextSize = paint.getTextSize();
@@ -78,9 +83,12 @@ public final class TextRenderer extends InvalidateableRenderer implements Colora
 
     rendererContext.canvasMatrix.concat(projectionMatrix);
 
-    canvas.clipRect(textBounds);
-
     if (hasFocus) {
+      if (selStart == selEnd) {
+        selectionPaint.setAlpha((int) (cursorAnimatedValue * 128));
+      } else {
+        selectionPaint.setAlpha(128);
+      }
       canvas.drawRect(selectionBounds, selectionPaint);
     }
 
@@ -166,7 +174,7 @@ public final class TextRenderer extends InvalidateableRenderer implements Colora
     if (this.color != color) {
       this.color = color;
       paint.setColor(color);
-      selectionPaint.setColor(color & ~0xff000000 | 0x7f000000);
+      selectionPaint.setColor(color);
       invalidate();
     }
   }
@@ -198,7 +206,33 @@ public final class TextRenderer extends InvalidateableRenderer implements Colora
   public void setFocused(boolean hasFocus) {
     if (this.hasFocus != hasFocus) {
       this.hasFocus = hasFocus;
-      invalidate();
+      if (cursorAnimator != null) {
+          cursorAnimator.cancel();
+          cursorAnimator = null;
+      }
+      if (hasFocus) {
+        cursorAnimator = ValueAnimator.ofFloat(0, 1);
+        cursorAnimator.setInterpolator(pulseInterpolator());
+        cursorAnimator.setRepeatCount(ValueAnimator.INFINITE);
+        cursorAnimator.setDuration(1000);
+        cursorAnimator.addUpdateListener(animation -> {
+          cursorAnimatedValue = (float) animation.getAnimatedValue();
+          invalidate();
+        });
+        cursorAnimator.start();
+      } else {
+        invalidate();
+      }
     }
   }
+
+  private static Interpolator pulseInterpolator() {
+    return input -> {
+      input *= 5;
+      if (input > 1) {
+        input = 4 - input;
+      }
+      return Math.max(0, Math.min(1, input));
+    };
+  }
 }

src/org/thoughtcrime/securesms/scribbles/ImageEditorFragment.java

@@ -212,7 +212,7 @@ public final class ImageEditorFragment extends Fragment implements ImageEditorHu
   }
 
   protected void addText() {
-    String        initialText = requireContext().getString(R.string.ImageEditorFragment_initial_text);
+    String        initialText = "";
     int           color       = imageEditorHud.getActiveColor();
     TextRenderer  renderer    = new TextRenderer(initialText, color);
     EditorElement element     = new EditorElement(renderer);