Support calling listener methods without interfaces.

Bug 21594573

It is convenient to be able to assign event listeners by just
referencing a method, similar to the way onClick="handler" works.

This adds a whole lot of listeners for the framework. Additional
listeners must be added for support library components.

This isn't perfect in resolving listeners. Perfect resolution
requires that each expression is evaluated in its own context
within the binding statement. If, for example, the same method
name is used for a listener and an accessor, we will assume
that the listener is used always and there will be a compilation
failure.

Change-Id: If4705122b67a451430451b6e7d890eb813af1c5c

1 files changed, 98 insertions, 9 deletions

diff --git a/extensions/baseAdapters/src/main/java/android/databinding/adapters/TextViewBindingAdapter.java b/extensions/baseAdapters/src/main/java/android/databinding/adapters/TextViewBindingAdapter.java
index 6b653719..01ea0069 100644
--- a/extensions/baseAdapters/src/main/java/android/databinding/adapters/TextViewBindingAdapter.java
+++ b/extensions/baseAdapters/src/main/java/android/databinding/adapters/TextViewBindingAdapter.java
@@ -20,8 +20,10 @@ import android.databinding.BindingMethod;
 import android.databinding.BindingMethods;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
+import android.text.Editable;
 import android.text.InputFilter;
 import android.text.InputType;
+import android.text.TextWatcher;
 import android.text.method.DialerKeyListener;
 import android.text.method.DigitsKeyListener;
 import android.text.method.KeyListener;
@@ -31,16 +33,19 @@ import android.util.Log;
 import android.util.TypedValue;
 import android.widget.TextView;
 
+import com.android.databinding.library.baseAdapters.R;
+
 @BindingMethods({
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:autoLink", method = "setAutoLinkMask"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:drawablePadding", method = "setCompoundDrawablePadding"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:editorExtras", method = "setInputExtras"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:inputType", method = "setRawInputType"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:scrollHorizontally", method = "setHorizontallyScrolling"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:textAllCaps", method = "setAllCaps"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:textColorHighlight", method = "setHighlightColor"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:textColorHint", method = "setHintTextColor"),
-        @BindingMethod(type = android.widget.TextView.class, attribute = "android:textColorLink", method = "setLinkTextColor"),
+        @BindingMethod(type = TextView.class, attribute = "android:autoLink", method = "setAutoLinkMask"),
+        @BindingMethod(type = TextView.class, attribute = "android:drawablePadding", method = "setCompoundDrawablePadding"),
+        @BindingMethod(type = TextView.class, attribute = "android:editorExtras", method = "setInputExtras"),
+        @BindingMethod(type = TextView.class, attribute = "android:inputType", method = "setRawInputType"),
+        @BindingMethod(type = TextView.class, attribute = "android:scrollHorizontally", method = "setHorizontallyScrolling"),
+        @BindingMethod(type = TextView.class, attribute = "android:textAllCaps", method = "setAllCaps"),
+        @BindingMethod(type = TextView.class, attribute = "android:textColorHighlight", method = "setHighlightColor"),
+        @BindingMethod(type = TextView.class, attribute = "android:textColorHint", method = "setHintTextColor"),
+        @BindingMethod(type = TextView.class, attribute = "android:textColorLink", method = "setLinkTextColor"),
+        @BindingMethod(type = TextView.class, attribute = "android:onEditorAction", method = "setOnEditorActionListener"),
 })
 public class TextViewBindingAdapter {
 
@@ -280,4 +285,88 @@ public class TextViewBindingAdapter {
     public static void setTextSize(TextView view, float size) {
         view.setTextSize(TypedValue.COMPLEX_UNIT_PX, size);
     }
+
+    @BindingAdapter("android:afterTextChanged")
+    public static void setListener(TextView view, AfterTextChanged after) {
+        setListener(view, null, null, after);
+    }
+
+    @BindingAdapter("android:beforeTextChanged")
+    public static void setListener(TextView view, BeforeTextChanged before) {
+        setListener(view, before, null, null);
+    }
+
+    @BindingAdapter("android:onTextChanged")
+    public static void setListener(TextView view, OnTextChanged onTextChanged) {
+        setListener(view, null, onTextChanged, null);
+    }
+
+    @BindingAdapter({"android:beforeTextChanged", "android:afterTextChanged"})
+    public static void setListener(TextView view, final BeforeTextChanged before,
+            final AfterTextChanged after) {
+        setListener(view, before, null, after);
+    }
+
+    @BindingAdapter({"android:beforeTextChanged", "android:onTextChanged"})
+    public static void setListener(TextView view, final BeforeTextChanged before,
+            final OnTextChanged on) {
+        setListener(view, before, on, null);
+    }
+
+    @BindingAdapter({"android:onTextChanged", "android:afterTextChanged"})
+    public static void setListener(TextView view,final OnTextChanged on,
+            final AfterTextChanged after) {
+        setListener(view, null, on, after);
+    }
+
+    @BindingAdapter({"android:beforeTextChanged", "android:onTextChanged", "android:afterTextChanged"})
+    public static void setListener(TextView view, final BeforeTextChanged before,
+            final OnTextChanged on, final AfterTextChanged after) {
+        final TextWatcher newValue;
+        if (before == null && after == null && on == null) {
+            newValue = null;
+        } else {
+            newValue = new TextWatcher() {
+                @Override
+                public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                    if (before != null) {
+                        before.beforeTextChanged(s, start, count, after);
+                    }
+                }
+
+                @Override
+                public void onTextChanged(CharSequence s, int start, int before, int count) {
+                    if (on != null) {
+                        on.onTextChanged(s, start, before, count);
+                    }
+                }
+
+                @Override
+                public void afterTextChanged(Editable s) {
+                    if (after != null) {
+                        after.afterTextChanged(s);
+                    }
+                }
+            };
+        }
+        final TextWatcher oldValue = ListenerUtil.trackListener(view, newValue, R.id.textWatcher);
+        if (oldValue != null) {
+            view.removeTextChangedListener(oldValue);
+        }
+        if (newValue != null) {
+            view.addTextChangedListener(newValue);
+        }
+    }
+
+    public interface AfterTextChanged {
+        void afterTextChanged(Editable s);
+    }
+
+    public interface BeforeTextChanged {
+        void beforeTextChanged(CharSequence s, int start, int count, int after);
+    }
+
+    public interface OnTextChanged {
+        void onTextChanged(CharSequence s, int start, int before, int count);
+    }
 }