[automerge] Make the text for the drop target buttons fit if it's too long. 2p: d2d8e97a65

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17454967

Change-Id: I2780d24f4e7e4032a17dcadde5f5b08d945f8cc5

res/values/dimens.xml

@@ -61,6 +61,10 @@
     <dimen name="drop_target_top_margin">36dp</dimen>
     <dimen name="drop_target_bottom_margin">16dp</dimen>
 
+    <!-- Button drop target bar -->
+    <dimen name="button_drop_target_min_text_size">10sp</dimen>
+    <dimen name="button_drop_target_resize_text_increment">1sp</dimen>
+
 <!-- App Widget resize frame -->
     <dimen name="widget_handle_margin">13dp</dimen>
     <dimen name="resize_frame_background_padding">24dp</dimen>

src/com/android/launcher3/ButtonDropTarget.java

@@ -140,7 +140,7 @@ public abstract class ButtonDropTarget extends TextView
                 y = -getMeasuredHeight();
                 message.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
                 if (mToolTipLocation == TOOLTIP_LEFT) {
-                    x = - getMeasuredWidth() - message.getMeasuredWidth() / 2;
+                    x = -getMeasuredWidth() - message.getMeasuredWidth() / 2;
                 } else {
                     x = getMeasuredWidth() / 2 + message.getMeasuredWidth() / 2;
                 }
@@ -324,6 +324,40 @@ public abstract class ButtonDropTarget extends TextView
         hideTooltip();
     }
 
+
+    /**
+     * Reduce the size of the text until it fits or reaches a minimum.
+     *
+     * The minimum size is defined by {@code R.dimen.button_drop_target_min_text_size} and
+     * it diminishes by intervals defined by
+     * {@code R.dimen.button_drop_target_resize_text_increment}
+     * This functionality is very similar to the option
+     * {@link TextView#setAutoSizeTextTypeWithDefaults(int)} but can't be used in this view because
+     * the layout width is {@code WRAP_CONTENT}.
+     *
+     * @param availableWidth Available width in the button to fit the text, used in
+     *        {@code ButtonDropTarget#isTextTruncated(int)}
+     * @return The biggest text size in SP that makes the text fit or if the text can't fit returns
+     *         the min available value
+     */
+    public float resizeTextToFit(int availableWidth) {
+        float minSize = Utilities.pxToSp(getResources()
+                .getDimensionPixelSize(R.dimen.button_drop_target_min_text_size));
+        float step = Utilities.pxToSp(getResources()
+                .getDimensionPixelSize(R.dimen.button_drop_target_resize_text_increment));
+        float textSize = Utilities.pxToSp(getTextSize());
+
+        while (textSize > minSize) {
+            if (isTextTruncated(availableWidth)) {
+                textSize -= step;
+                setTextSize(textSize);
+            } else {
+                return textSize;
+            }
+        }
+        return minSize;
+    }
+
     public boolean isTextTruncated(int availableWidth) {
         availableWidth -= (getPaddingLeft() + getPaddingRight() + mDrawable.getIntrinsicWidth()
                 + getCompoundDrawablePadding());

src/com/android/launcher3/DropTargetBar.java

@@ -140,9 +140,22 @@ public class DropTargetBar extends FrameLayout
         if (visibleCount > 0) {
             int availableWidth = width / visibleCount;
             boolean textVisible = true;
-            for (ButtonDropTarget buttons : mDropTargets) {
+            boolean textResized = false;
-                if (buttons.getVisibility() != GONE) {
+            float textSize = mDropTargets[0].getTextSize();
-                    textVisible = textVisible && !buttons.isTextTruncated(availableWidth);
+            for (ButtonDropTarget button : mDropTargets) {
+                if (button.getVisibility() == GONE) {
+                    continue;
+                }
+                if (button.isTextTruncated(availableWidth)) {
+                    textSize = Math.min(textSize, button.resizeTextToFit(availableWidth));
+                    textResized = true;
+                }
+                textVisible = textVisible && !button.isTextTruncated(availableWidth);
+            }
+
+            if (textResized) {
+                for (ButtonDropTarget button : mDropTargets) {
+                    button.setTextSize(textSize);
                 }
             }
 

src/com/android/launcher3/Utilities.java

@@ -483,6 +483,11 @@ public final class Utilities {
         return res.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
     }
 
+    /** Converts a pixel value (px) to scale pixel value (SP) for the current device. */
+    public static float pxToSp(float size) {
+        return size / Resources.getSystem().getDisplayMetrics().scaledDensity;
+    }
+
     public static float dpiFromPx(float size, int densityDpi) {
         float densityRatio = (float) densityDpi / DisplayMetrics.DENSITY_DEFAULT;
         return (size / densityRatio);