@@ -1,8 +1,5 @@
package eu.siacs.conversations.ui.widget;
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
@@ -13,199 +10,202 @@ import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
public class ListSelectionManager {
- private static final int MESSAGE_SEND_RESET = 1;
- private static final int MESSAGE_RESET = 2;
- private static final int MESSAGE_START_SELECTION = 3;
-
- private static final Handler HANDLER = new Handler(Looper.getMainLooper(), new Handler.Callback() {
-
- @Override
- public boolean handleMessage(Message msg) {
- switch (msg.what) {
- case MESSAGE_SEND_RESET: {
- // Skip one more message queue loop
- HANDLER.obtainMessage(MESSAGE_RESET, msg.obj).sendToTarget();
- return true;
- }
- case MESSAGE_RESET: {
- final ListSelectionManager listSelectionManager = (ListSelectionManager) msg.obj;
- listSelectionManager.futureSelectionIdentifier = null;
- return true;
- }
- case MESSAGE_START_SELECTION: {
- final StartSelectionHolder holder = (StartSelectionHolder) msg.obj;
- holder.listSelectionManager.futureSelectionIdentifier = null;
- startSelection(holder.textView, holder.start, holder.end);
- return true;
- }
- }
- return false;
- }
- });
-
- private static class StartSelectionHolder {
-
- public final ListSelectionManager listSelectionManager;
- public final TextView textView;
- public final int start;
- public final int end;
-
- public StartSelectionHolder(ListSelectionManager listSelectionManager, TextView textView,
- int start, int end) {
- this.listSelectionManager = listSelectionManager;
- this.textView = textView;
- this.start = start;
- this.end = end;
- }
- }
-
- private ActionMode selectionActionMode;
- private Object selectionIdentifier;
- private TextView selectionTextView;
-
- private Object futureSelectionIdentifier;
- private int futureSelectionStart;
- private int futureSelectionEnd;
-
- public void onCreate(TextView textView, ActionMode.Callback additionalCallback) {
- final CustomCallback callback = new CustomCallback(textView, additionalCallback);
- textView.setCustomSelectionActionModeCallback(callback);
- }
-
- public void onUpdate(TextView textView, Object identifier) {
- if (SUPPORTED) {
- CustomCallback callback = (CustomCallback) textView.getCustomSelectionActionModeCallback();
- callback.identifier = identifier;
- if (futureSelectionIdentifier == identifier) {
- HANDLER.obtainMessage(MESSAGE_START_SELECTION, new StartSelectionHolder(this,
- textView, futureSelectionStart, futureSelectionEnd)).sendToTarget();
- }
- }
- }
-
- public void onBeforeNotifyDataSetChanged() {
- if (SUPPORTED) {
- HANDLER.removeMessages(MESSAGE_SEND_RESET);
- HANDLER.removeMessages(MESSAGE_RESET);
- HANDLER.removeMessages(MESSAGE_START_SELECTION);
- if (selectionActionMode != null) {
- final CharSequence text = selectionTextView.getText();
- futureSelectionIdentifier = selectionIdentifier;
- futureSelectionStart = Selection.getSelectionStart(text);
- futureSelectionEnd = Selection.getSelectionEnd(text);
- selectionActionMode.finish();
- selectionActionMode = null;
- selectionIdentifier = null;
- selectionTextView = null;
- }
- }
- }
-
- public void onAfterNotifyDataSetChanged() {
- if (SUPPORTED && futureSelectionIdentifier != null) {
- HANDLER.obtainMessage(MESSAGE_SEND_RESET, this).sendToTarget();
- }
- }
-
- private class CustomCallback implements ActionMode.Callback {
-
- private final TextView textView;
- private final ActionMode.Callback additionalCallback;
- public Object identifier;
-
- public CustomCallback(TextView textView, ActionMode.Callback additionalCallback) {
- this.textView = textView;
- this.additionalCallback = additionalCallback;
- }
-
- @Override
- public boolean onCreateActionMode(ActionMode mode, Menu menu) {
- selectionActionMode = mode;
- selectionIdentifier = identifier;
- selectionTextView = textView;
- if (additionalCallback != null) {
- additionalCallback.onCreateActionMode(mode, menu);
- }
- return true;
- }
-
- @Override
- public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
- if (additionalCallback != null) {
- additionalCallback.onPrepareActionMode(mode, menu);
- }
- return true;
- }
-
- @Override
- public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
- if (additionalCallback != null && additionalCallback.onActionItemClicked(mode, item)) {
- return true;
- }
- return false;
- }
-
- @Override
- public void onDestroyActionMode(ActionMode mode) {
- if (additionalCallback != null) {
- additionalCallback.onDestroyActionMode(mode);
- }
- if (selectionActionMode == mode) {
- selectionActionMode = null;
- selectionIdentifier = null;
- selectionTextView = null;
- }
- }
- }
-
- private static final Field FIELD_EDITOR;
- private static final Method METHOD_START_SELECTION;
- private static final boolean SUPPORTED;
-
- static {
- Field editor;
- try {
- editor = TextView.class.getDeclaredField("mEditor");
- editor.setAccessible(true);
- } catch (Exception e) {
- editor = null;
- }
- FIELD_EDITOR = editor;
- Method startSelection = null;
- if (editor != null) {
- String[] startSelectionNames = {"startSelectionActionMode", "startSelectionActionModeWithSelection"};
- for (String startSelectionName : startSelectionNames) {
- try {
- startSelection = editor.getType().getDeclaredMethod(startSelectionName);
- startSelection.setAccessible(true);
- break;
- } catch (Exception e) {
- startSelection = null;
- }
- }
- }
- METHOD_START_SELECTION = startSelection;
- SUPPORTED = FIELD_EDITOR != null && METHOD_START_SELECTION != null;
- }
-
- public static boolean isSupported() {
- return SUPPORTED;
- }
-
- public static void startSelection(TextView textView, int start, int end) {
- final CharSequence text = textView.getText();
- if (SUPPORTED && start >= 0 && end > start && textView.isTextSelectable() && text instanceof Spannable) {
- final Spannable spannable = (Spannable) text;
- start = Math.min(start, spannable.length());
- end = Math.min(end, spannable.length());
- Selection.setSelection(spannable, start, end);
- try {
- final Object editor = FIELD_EDITOR != null ? FIELD_EDITOR.get(textView) : textView;
- METHOD_START_SELECTION.invoke(editor);
- } catch (Exception e) {
- }
- }
- }
+ private static final int MESSAGE_SEND_RESET = 1;
+ private static final int MESSAGE_RESET = 2;
+ private static final int MESSAGE_START_SELECTION = 3;
+ private static final Field FIELD_EDITOR;
+ private static final Method METHOD_START_SELECTION;
+ private static final boolean SUPPORTED;
+ private static final Handler HANDLER = new Handler(Looper.getMainLooper(), new Handler.Callback() {
+
+ @Override
+ public boolean handleMessage(Message msg) {
+ switch (msg.what) {
+ case MESSAGE_SEND_RESET: {
+ // Skip one more message queue loop
+ HANDLER.obtainMessage(MESSAGE_RESET, msg.obj).sendToTarget();
+ return true;
+ }
+ case MESSAGE_RESET: {
+ final ListSelectionManager listSelectionManager = (ListSelectionManager) msg.obj;
+ listSelectionManager.futureSelectionIdentifier = null;
+ return true;
+ }
+ case MESSAGE_START_SELECTION: {
+ final StartSelectionHolder holder = (StartSelectionHolder) msg.obj;
+ holder.listSelectionManager.futureSelectionIdentifier = null;
+ startSelection(holder.textView, holder.start, holder.end);
+ return true;
+ }
+ }
+ return false;
+ }
+ });
+
+ static {
+ Field editor;
+ try {
+ editor = TextView.class.getDeclaredField("mEditor");
+ editor.setAccessible(true);
+ } catch (Exception e) {
+ editor = null;
+ }
+ FIELD_EDITOR = editor;
+ Method startSelection = null;
+ if (editor != null) {
+ String[] startSelectionNames = {"startSelectionActionMode", "startSelectionActionModeWithSelection"};
+ for (String startSelectionName : startSelectionNames) {
+ try {
+ startSelection = editor.getType().getDeclaredMethod(startSelectionName);
+ startSelection.setAccessible(true);
+ break;
+ } catch (Exception e) {
+ startSelection = null;
+ }
+ }
+ }
+ METHOD_START_SELECTION = startSelection;
+ SUPPORTED = FIELD_EDITOR != null && METHOD_START_SELECTION != null;
+ }
+
+ private ActionMode selectionActionMode;
+ private Object selectionIdentifier;
+ private TextView selectionTextView;
+ private Object futureSelectionIdentifier;
+ private int futureSelectionStart;
+ private int futureSelectionEnd;
+
+ public static boolean isSupported() {
+ return SUPPORTED;
+ }
+
+ private static void startSelection(TextView textView, int start, int end) {
+ final CharSequence text = textView.getText();
+ if (SUPPORTED && start >= 0 && end > start && textView.isTextSelectable() && text instanceof Spannable) {
+ final Spannable spannable = (Spannable) text;
+ start = Math.min(start, spannable.length());
+ end = Math.min(end, spannable.length());
+ Selection.setSelection(spannable, start, end);
+ try {
+ final Object editor = FIELD_EDITOR != null ? FIELD_EDITOR.get(textView) : textView;
+ METHOD_START_SELECTION.invoke(editor);
+ } catch (Exception e) {
+ }
+ }
+ }
+
+ public void onCreate(TextView textView, ActionMode.Callback additionalCallback) {
+ final CustomCallback callback = new CustomCallback(textView, additionalCallback);
+ textView.setCustomSelectionActionModeCallback(callback);
+ }
+
+ public void onUpdate(TextView textView, Object identifier) {
+ if (SUPPORTED) {
+ final ActionMode.Callback callback = textView.getCustomSelectionActionModeCallback();
+ if (callback instanceof CustomCallback) {
+ final CustomCallback customCallback = (CustomCallback) textView.getCustomSelectionActionModeCallback();
+ customCallback.identifier = identifier;
+ if (futureSelectionIdentifier == identifier) {
+ HANDLER.obtainMessage(MESSAGE_START_SELECTION, new StartSelectionHolder(this,
+ textView, futureSelectionStart, futureSelectionEnd)).sendToTarget();
+ }
+ }
+ }
+ }
+
+ public void onBeforeNotifyDataSetChanged() {
+ if (SUPPORTED) {
+ HANDLER.removeMessages(MESSAGE_SEND_RESET);
+ HANDLER.removeMessages(MESSAGE_RESET);
+ HANDLER.removeMessages(MESSAGE_START_SELECTION);
+ if (selectionActionMode != null) {
+ final CharSequence text = selectionTextView.getText();
+ futureSelectionIdentifier = selectionIdentifier;
+ futureSelectionStart = Selection.getSelectionStart(text);
+ futureSelectionEnd = Selection.getSelectionEnd(text);
+ selectionActionMode.finish();
+ selectionActionMode = null;
+ selectionIdentifier = null;
+ selectionTextView = null;
+ }
+ }
+ }
+
+ public void onAfterNotifyDataSetChanged() {
+ if (SUPPORTED && futureSelectionIdentifier != null) {
+ HANDLER.obtainMessage(MESSAGE_SEND_RESET, this).sendToTarget();
+ }
+ }
+
+ private static class StartSelectionHolder {
+
+ final ListSelectionManager listSelectionManager;
+ final TextView textView;
+ public final int start;
+ public final int end;
+
+ StartSelectionHolder(ListSelectionManager listSelectionManager, TextView textView,
+ int start, int end) {
+ this.listSelectionManager = listSelectionManager;
+ this.textView = textView;
+ this.start = start;
+ this.end = end;
+ }
+ }
+
+ private class CustomCallback implements ActionMode.Callback {
+
+ private final TextView textView;
+ private final ActionMode.Callback additionalCallback;
+ Object identifier;
+
+ CustomCallback(TextView textView, ActionMode.Callback additionalCallback) {
+ this.textView = textView;
+ this.additionalCallback = additionalCallback;
+ }
+
+ @Override
+ public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+ selectionActionMode = mode;
+ selectionIdentifier = identifier;
+ selectionTextView = textView;
+ if (additionalCallback != null) {
+ additionalCallback.onCreateActionMode(mode, menu);
+ }
+ return true;
+ }
+
+ @Override
+ public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+ if (additionalCallback != null) {
+ additionalCallback.onPrepareActionMode(mode, menu);
+ }
+ return true;
+ }
+
+ @Override
+ public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+ if (additionalCallback != null && additionalCallback.onActionItemClicked(mode, item)) {
+ return true;
+ }
+ return false;
+ }
+
+ @Override
+ public void onDestroyActionMode(ActionMode mode) {
+ if (additionalCallback != null) {
+ additionalCallback.onDestroyActionMode(mode);
+ }
+ if (selectionActionMode == mode) {
+ selectionActionMode = null;
+ selectionIdentifier = null;
+ selectionTextView = null;
+ }
+ }
+ }
}