Customizes input extract edit view for Wear

Provides an alternate presentation of the extract edit area
of an input method window, designed for sub 250dp width screens.

An icon is used on a round material style button in place of a text
action, providing more horizontal space for the editing area.

BUG: 28098677
(cherry picked from commit fd71a6a5d99bad5d3ab32edc328fb5b026b66215)

Change-Id: I0e559d17f78d1a48b37979a49e11ae1aad7503f4

1 files changed, 118 insertions, 0 deletions

diff --git a/core/java/android/inputmethodservice/CompactExtractEditLayout.java b/core/java/android/inputmethodservice/CompactExtractEditLayout.java
new file mode 100644
index 000000000000..35c54b284275
--- /dev/null
+++ b/core/java/android/inputmethodservice/CompactExtractEditLayout.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.inputmethodservice;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.annotation.FractionRes;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+
+/**
+ * A special purpose layout for the editor extract view for tiny (sub 250dp) screens.
+ * The layout is based on sizes proportional to screen pixel size to provide for the
+ * best layout fidelity on varying pixel sizes and densities.
+ *
+ * @hide
+ */
+public class CompactExtractEditLayout extends LinearLayout {
+    private View mInputExtractEditText;
+    private View mInputExtractAccessories;
+    private View mInputExtractAction;
+    private boolean mPerformLayoutChanges;
+
+    public CompactExtractEditLayout(Context context) {
+        super(context);
+    }
+
+    public CompactExtractEditLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public CompactExtractEditLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mInputExtractEditText = findViewById(com.android.internal.R.id.inputExtractEditText);
+        mInputExtractAccessories = findViewById(com.android.internal.R.id.inputExtractAccessories);
+        mInputExtractAction = findViewById(com.android.internal.R.id.inputExtractAction);
+
+        if (mInputExtractEditText != null && mInputExtractAccessories != null
+                && mInputExtractAction != null) {
+            mPerformLayoutChanges = true;
+        }
+    }
+
+    private int applyFractionInt(@FractionRes int fraction, int whole) {
+        return Math.round(getResources().getFraction(fraction, whole, whole));
+    }
+
+    private static void setLayoutHeight(View v, int px) {
+        ViewGroup.LayoutParams lp = v.getLayoutParams();
+        lp.height = px;
+        v.setLayoutParams(lp);
+    }
+
+    private static void setLayoutMarginBottom(View v, int px) {
+        ViewGroup.MarginLayoutParams lp = (MarginLayoutParams) v.getLayoutParams();
+        lp.bottomMargin = px;
+        v.setLayoutParams(lp);
+    }
+
+    private void applyProportionalLayout(int screenWidthPx, int screenHeightPx) {
+        if (getResources().getConfiguration().isScreenRound()) {
+            setGravity(Gravity.BOTTOM);
+        }
+        setLayoutHeight(this, applyFractionInt(
+                com.android.internal.R.fraction.input_extract_layout_height, screenHeightPx));
+
+        setPadding(
+                applyFractionInt(com.android.internal.R.fraction.input_extract_layout_padding_left,
+                        screenWidthPx),
+                0,
+                applyFractionInt(com.android.internal.R.fraction.input_extract_layout_padding_right,
+                        screenWidthPx),
+                0);
+
+        setLayoutMarginBottom(mInputExtractEditText,
+                applyFractionInt(com.android.internal.R.fraction.input_extract_text_margin_bottom,
+                        screenHeightPx));
+
+        setLayoutMarginBottom(mInputExtractAccessories,
+                applyFractionInt(com.android.internal.R.fraction.input_extract_action_margin_bottom,
+                        screenHeightPx));
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        if (mPerformLayoutChanges) {
+            Resources res = getResources();
+            DisplayMetrics dm = res.getDisplayMetrics();
+            int heightPixels = dm.heightPixels;
+            int widthPixels = dm.widthPixels;
+            applyProportionalLayout(widthPixels, heightPixels);
+        }
+    }
+}