/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*- * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ package org.mozilla.gecko; import org.mozilla.gecko.gfx.InputConnectionHandler; import org.mozilla.gecko.gfx.LayerView; import android.os.Build; import android.text.Editable; import android.text.InputFilter; import android.text.Spanned; import android.text.Spannable; import android.text.SpannableString; import android.text.SpannableStringBuilder; import android.text.Selection; import android.text.TextPaint; import android.text.TextUtils; import android.text.style.CharacterStyle; import android.util.Log; import java.lang.reflect.InvocationHandler; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.lang.reflect.Proxy; import java.util.concurrent.ConcurrentLinkedQueue; import java.util.concurrent.Semaphore; // interface for the UI thread interface GeckoEditableClient { void sendEvent(GeckoEvent event); Editable getEditable(); void setUpdateGecko(boolean update); } /* interface for the Editable to listen to the Gecko thread and also for the UI thread to listen to the Editable */ interface GeckoEditableListener { // IME notification type for notifyIME() final int NOTIFY_IME_RESETINPUTSTATE = 0; final int NOTIFY_IME_REPLY_EVENT = 1; final int NOTIFY_IME_CANCELCOMPOSITION = 2; final int NOTIFY_IME_FOCUSCHANGE = 3; // IME focus state for notifyIME(NOTIFY_IME_FOCUSCHANGE, ..) final int IME_FOCUS_STATE_FOCUS = 1; final int IME_FOCUS_STATE_BLUR = 0; // IME enabled state for notifyIMEEnabled() final int IME_STATE_DISABLED = 0; final int IME_STATE_ENABLED = 1; final int IME_STATE_PASSWORD = 2; final int IME_STATE_PLUGIN = 3; void notifyIME(int type, int state); void notifyIMEEnabled(int state, String typeHint, String modeHint, String actionHint); void onSelectionChange(int start, int end); void onTextChange(String text, int start, int oldEnd, int newEnd); } /* GeckoEditable implements only some functions of Editable The field mText contains the actual underlying SpannableStringBuilder/Editable that contains our text. */ final class GeckoEditable implements InvocationHandler, Editable, GeckoEditableClient, GeckoEditableListener { private static final boolean DEBUG = false; private static final String LOGTAG = "GeckoEditable"; // Filters to implement Editable's filtering functionality private InputFilter[] mFilters; private final SpannableStringBuilder mText; private final SpannableStringBuilder mChangedText; private final Editable mProxy; private final ActionQueue mActionQueue; private GeckoEditableListener mListener; private int mSavedSelectionStart; private volatile int mGeckoUpdateSeqno; private int mUIUpdateSeqno; private int mLastUIUpdateSeqno; private boolean mUpdateGecko; private boolean mFocused; /* An action that alters the Editable Each action corresponds to a Gecko event. While the Gecko event is being sent to the Gecko thread, the action stays on top of mActions queue. After the Gecko event is processed and replied, the action is removed from the queue */ private static final class Action { // For input events (keypress, etc.); use with IME_SYNCHRONIZE static final int TYPE_EVENT = 0; // For Editable.replace() call; use with IME_REPLACE_TEXT static final int TYPE_REPLACE_TEXT = 1; /* For Editable.setSpan(Selection...) call; use with IME_SYNCHRONIZE Note that we don't use this with IME_SET_SELECTION because we don't want to update the Gecko selection at the point of this action. The Gecko selection is updated only after UI has updated its selection (during IME_SYNCHRONIZE reply) */ static final int TYPE_SET_SELECTION = 2; // For Editable.setSpan() call; use with IME_SYNCHRONIZE static final int TYPE_SET_SPAN = 3; // For Editable.removeSpan() call; use with IME_SYNCHRONIZE static final int TYPE_REMOVE_SPAN = 4; final int mType; int mStart; int mEnd; CharSequence mSequence; Object mSpanObject; int mSpanFlags; boolean mShouldUpdate; Action(int type) { mType = type; } static Action newReplaceText(CharSequence text, int start, int end) { if (start < 0 || start > end) { throw new IllegalArgumentException("invalid replace text offsets"); } final Action action = new Action(TYPE_REPLACE_TEXT); action.mSequence = text; action.mStart = start; action.mEnd = end; return action; } static Action newSetSelection(int start, int end) { // start == -1 when the start offset should remain the same // end == -1 when the end offset should remain the same if (start < -1 || end < -1) { throw new IllegalArgumentException("invalid selection offsets"); } final Action action = new Action(TYPE_SET_SELECTION); action.mStart = start; action.mEnd = end; return action; } static Action newSetSpan(Object object, int start, int end, int flags) { if (start < 0 || start > end) { throw new IllegalArgumentException("invalid span offsets"); } final Action action = new Action(TYPE_SET_SPAN); action.mSpanObject = object; action.mStart = start; action.mEnd = end; action.mSpanFlags = flags; return action; } } /* Queue of editing actions sent to Gecko thread that the Gecko thread has not responded to yet */ private final class ActionQueue { private final ConcurrentLinkedQueue mActions; private final Semaphore mActionsActive; ActionQueue() { mActions = new ConcurrentLinkedQueue(); mActionsActive = new Semaphore(1); } void offer(Action action) { if (DEBUG) { GeckoApp.assertOnUiThread(); } /* Events don't need update because they generate text/selection notifications which will do the updating for us */ if (action.mType != Action.TYPE_EVENT) { action.mShouldUpdate = mUpdateGecko; } if (mActions.isEmpty()) { mActionsActive.acquireUninterruptibly(); mActions.offer(action); } else synchronized(this) { // tryAcquire here in case Gecko thread has just released it mActionsActive.tryAcquire(); mActions.offer(action); } switch (action.mType) { case Action.TYPE_EVENT: case Action.TYPE_SET_SELECTION: case Action.TYPE_SET_SPAN: case Action.TYPE_REMOVE_SPAN: GeckoAppShell.sendEventToGecko( GeckoEvent.createIMEEvent(GeckoEvent.IME_SYNCHRONIZE)); break; case Action.TYPE_REPLACE_TEXT: GeckoAppShell.sendEventToGecko(GeckoEvent.createIMEReplaceEvent( action.mStart, action.mEnd, action.mSequence.toString())); break; } ++mUIUpdateSeqno; } void poll() { if (DEBUG) { GeckoApp.assertOnGeckoThread(); } if (mActions.isEmpty()) { throw new IllegalStateException("empty actions queue"); } mActions.poll(); // Don't bother locking if queue is not empty yet if (mActions.isEmpty()) { synchronized(this) { if (mActions.isEmpty()) { mActionsActive.release(); } } } } Action peek() { if (DEBUG) { GeckoApp.assertOnGeckoThread(); } if (mActions.isEmpty()) { throw new IllegalStateException("empty actions queue"); } return mActions.peek(); } void syncWithGecko() { if (DEBUG) { GeckoApp.assertOnUiThread(); } if (mFocused && !mActions.isEmpty()) { mActionsActive.acquireUninterruptibly(); mActionsActive.release(); } } boolean isEmpty() { return mActions.isEmpty(); } } GeckoEditable() { mActionQueue = new ActionQueue(); mSavedSelectionStart = -1; mUpdateGecko = true; mText = new SpannableStringBuilder(); mChangedText = new SpannableStringBuilder(); final Class[] PROXY_INTERFACES = { Editable.class }; mProxy = (Editable)Proxy.newProxyInstance( Editable.class.getClassLoader(), PROXY_INTERFACES, this); LayerView v = GeckoApp.mAppContext.getLayerView(); mListener = GeckoInputConnection.create(v, this); } private static void geckoPostToUI(Runnable runnable) { GeckoApp.mAppContext.mMainHandler.post(runnable); } private void geckoUpdateGecko(final boolean force) { /* We do not increment the seqno here, but only check it, because geckoUpdateGecko is a request for update. If we incremented the seqno here, geckoUpdateGecko would have prevented other updates from occurring */ final int seqnoWhenPosted = mGeckoUpdateSeqno; geckoPostToUI(new Runnable() { public void run() { mActionQueue.syncWithGecko(); if (seqnoWhenPosted == mGeckoUpdateSeqno) { uiUpdateGecko(force); } } }); } private Object getField(Object obj, String field, Object def) { try { return obj.getClass().getField(field).get(obj); } catch (Exception e) { return def; } } private void uiUpdateGecko(boolean force) { if (!force && mUIUpdateSeqno == mLastUIUpdateSeqno) { if (DEBUG) { Log.d(LOGTAG, "uiUpdateGecko() skipped"); } return; } mLastUIUpdateSeqno = mUIUpdateSeqno; mActionQueue.syncWithGecko(); if (DEBUG) { Log.d(LOGTAG, "uiUpdateGecko()"); } final int selStart = mText.getSpanStart(Selection.SELECTION_START); final int selEnd = mText.getSpanEnd(Selection.SELECTION_END); int composingStart = mText.length(); int composingEnd = 0; Object[] spans = mText.getSpans(0, composingStart, Object.class); for (Object span : spans) { if ((mText.getSpanFlags(span) & Spanned.SPAN_COMPOSING) != 0) { composingStart = Math.min(composingStart, mText.getSpanStart(span)); composingEnd = Math.max(composingEnd, mText.getSpanEnd(span)); } } if (DEBUG) { Log.d(LOGTAG, " range = " + composingStart + "-" + composingEnd); Log.d(LOGTAG, " selection = " + selStart + "-" + selEnd); } if (composingStart >= composingEnd) { GeckoAppShell.sendEventToGecko(GeckoEvent.createIMEEvent( GeckoEvent.IME_REMOVE_COMPOSITION)); if (selStart >= 0 && selEnd >= 0) { GeckoAppShell.sendEventToGecko( GeckoEvent.createIMESelectEvent(selStart, selEnd)); } return; } if (selEnd >= composingStart && selEnd <= composingEnd) { GeckoAppShell.sendEventToGecko(GeckoEvent.createIMERangeEvent( selEnd - composingStart, selEnd - composingStart, GeckoEvent.IME_RANGE_CARETPOSITION, 0, 0, false, 0, 0, 0)); } int rangeStart = composingStart; TextPaint tp = new TextPaint(); TextPaint emptyTp = new TextPaint(); do { int rangeType, rangeStyles = 0, rangeLineStyle = GeckoEvent.IME_RANGE_LINE_NONE; boolean rangeBoldLine = false; int rangeForeColor = 0, rangeBackColor = 0, rangeLineColor = 0; int rangeEnd = mText.nextSpanTransition(rangeStart, composingEnd, Object.class); if (selStart > rangeStart && selStart < rangeEnd) { rangeEnd = selStart; } else if (selEnd > rangeStart && selEnd < rangeEnd) { rangeEnd = selEnd; } CharacterStyle[] styleSpans = mText.getSpans(rangeStart, rangeEnd, CharacterStyle.class); if (DEBUG) { Log.d(LOGTAG, " found " + styleSpans.length + " spans @ " + rangeStart + "-" + rangeEnd); } if (styleSpans.length == 0) { rangeType = (selStart == rangeStart && selEnd == rangeEnd) ? GeckoEvent.IME_RANGE_SELECTEDRAWTEXT : GeckoEvent.IME_RANGE_RAWINPUT; } else { rangeType = (selStart == rangeStart && selEnd == rangeEnd) ? GeckoEvent.IME_RANGE_SELECTEDCONVERTEDTEXT : GeckoEvent.IME_RANGE_CONVERTEDTEXT; tp.set(emptyTp); for (CharacterStyle span : styleSpans) { span.updateDrawState(tp); } int tpUnderlineColor = 0; float tpUnderlineThickness = 0.0f; // These TextPaint fields only exist on Android ICS+ and are not in the SDK if (Build.VERSION.SDK_INT >= 14) { tpUnderlineColor = (Integer)getField(tp, "underlineColor", 0); tpUnderlineThickness = (Float)getField(tp, "underlineThickness", 0.0f); } if (tpUnderlineColor != 0) { rangeStyles |= GeckoEvent.IME_RANGE_UNDERLINE | GeckoEvent.IME_RANGE_LINECOLOR; rangeLineColor = tpUnderlineColor; // Approximately translate underline thickness to what Gecko understands if (tpUnderlineThickness <= 0.5f) { rangeLineStyle = GeckoEvent.IME_RANGE_LINE_DOTTED; } else { rangeLineStyle = GeckoEvent.IME_RANGE_LINE_SOLID; if (tpUnderlineThickness >= 2.0f) { rangeBoldLine = true; } } } else if (tp.isUnderlineText()) { rangeStyles |= GeckoEvent.IME_RANGE_UNDERLINE; rangeLineStyle = GeckoEvent.IME_RANGE_LINE_SOLID; } if (tp.getColor() != 0) { rangeStyles |= GeckoEvent.IME_RANGE_FORECOLOR; rangeForeColor = tp.getColor(); } if (tp.bgColor != 0) { rangeStyles |= GeckoEvent.IME_RANGE_BACKCOLOR; rangeBackColor = tp.bgColor; } } GeckoAppShell.sendEventToGecko(GeckoEvent.createIMERangeEvent( rangeStart - composingStart, rangeEnd - composingStart, rangeType, rangeStyles, rangeLineStyle, rangeBoldLine, rangeForeColor, rangeBackColor, rangeLineColor)); rangeStart = rangeEnd; if (DEBUG) { Log.d(LOGTAG, " added " + rangeType + " : " + rangeStyles + " : " + Integer.toHexString(rangeForeColor) + " : " + Integer.toHexString(rangeBackColor)); } } while (rangeStart < composingEnd); GeckoAppShell.sendEventToGecko(GeckoEvent.createIMECompositionEvent( composingStart, composingEnd)); } // GeckoEditableClient interface @Override public void sendEvent(GeckoEvent event) { if (DEBUG) { // GeckoEditableClient methods should all be called from the UI thread GeckoApp.assertOnUiThread(); } /* We are actually sending two events to Gecko here, 1. Event from the event parameter (key event, etc.) 2. Sync event from the mActionQueue.offer call The first event is a normal GeckoEvent that does not reply back to us, the second sync event will have a reply, during which we see that there is a pending event-type action, and update the selection/composition/etc. accordingly. */ GeckoAppShell.sendEventToGecko(event); mActionQueue.offer(new Action(Action.TYPE_EVENT)); } @Override public Editable getEditable() { if (DEBUG) { // GeckoEditableClient methods should all be called from the UI thread GeckoApp.assertOnUiThread(); } return mProxy; } @Override public void setUpdateGecko(boolean update) { if (DEBUG) { // GeckoEditableClient methods should all be called from the UI thread GeckoApp.assertOnUiThread(); } if (update) { uiUpdateGecko(false); } mUpdateGecko = update; } // GeckoEditableListener interface private void geckoActionReply() { if (DEBUG) { // GeckoEditableListener methods should all be called from the Gecko thread GeckoApp.assertOnGeckoThread(); } final Action action = mActionQueue.peek(); switch (action.mType) { case Action.TYPE_SET_SELECTION: final int len = mText.length(); final int curStart = Selection.getSelectionStart(mText); final int curEnd = Selection.getSelectionEnd(mText); // start == -1 when the start offset should remain the same // end == -1 when the end offset should remain the same final int selStart = Math.min(action.mStart < 0 ? curStart : action.mStart, len); final int selEnd = Math.min(action.mEnd < 0 ? curEnd : action.mEnd, len); if (selStart < action.mStart || selEnd < action.mEnd) { Log.w(LOGTAG, "IME sync error: selection out of bounds"); } Selection.setSelection(mText, selStart, selEnd); geckoPostToUI(new Runnable() { public void run() { mActionQueue.syncWithGecko(); final int start = Selection.getSelectionStart(mText); final int end = Selection.getSelectionEnd(mText); if (selStart == start && selEnd == end) { // There has not been another new selection in the mean time that // made this notification out-of-date mListener.onSelectionChange(start, end); } } }); break; case Action.TYPE_SET_SPAN: mText.setSpan(action.mSpanObject, action.mStart, action.mEnd, action.mSpanFlags); break; } if (action.mShouldUpdate) { geckoUpdateGecko(false); } } @Override public void notifyIME(final int type, final int state) { if (DEBUG) { // GeckoEditableListener methods should all be called from the Gecko thread GeckoApp.assertOnGeckoThread(); } if (type == NOTIFY_IME_REPLY_EVENT) { try { if (mFocused) { // When mFocused is false, the reply is for a stale action, // and we should not do anything geckoActionReply(); } } finally { // Ensure action is always removed from queue // even if stale action results in exception in geckoActionReply mActionQueue.poll(); } return; } geckoPostToUI(new Runnable() { public void run() { // Make sure there are no other things going on mActionQueue.syncWithGecko(); if (type == NOTIFY_IME_FOCUSCHANGE) { if (state == IME_FOCUS_STATE_BLUR) { mFocused = false; } else { mFocused = true; // Unmask events on the Gecko side GeckoAppShell.sendEventToGecko(GeckoEvent.createIMEEvent( GeckoEvent.IME_ACKNOWLEDGE_FOCUS)); } } mListener.notifyIME(type, state); } }); } @Override public void notifyIMEEnabled(final int state, final String typeHint, final String modeHint, final String actionHint) { // Because we want to be able to bind GeckoEditable to the newest LayerView instance, // this can be called from the Java UI thread in addition to the Gecko thread. geckoPostToUI(new Runnable() { public void run() { // Make sure there are no other things going on mActionQueue.syncWithGecko(); // Set InputConnectionHandler in notifyIMEEnabled because // GeckoInputConnection.notifyIMEEnabled calls restartInput() which will invoke // InputConnectionHandler.onCreateInputConnection LayerView v = GeckoApp.mAppContext.getLayerView(); if (v != null) { mListener = GeckoInputConnection.create(v, GeckoEditable.this); v.setInputConnectionHandler((InputConnectionHandler)mListener); mListener.notifyIMEEnabled(state, typeHint, modeHint, actionHint); } } }); } @Override public void onSelectionChange(final int start, final int end) { if (DEBUG) { // GeckoEditableListener methods should all be called from the Gecko thread GeckoApp.assertOnGeckoThread(); } if (start < 0 || start > mText.length() || end < 0 || end > mText.length()) { throw new IllegalArgumentException("invalid selection notification range"); } final int seqnoWhenPosted = ++mGeckoUpdateSeqno; /* An event (keypress, etc.) has potentially changed the selection, synchronize the selection here. There is not a race with the UI thread because the UI thread should be blocked on the event action */ if (!mActionQueue.isEmpty() && mActionQueue.peek().mType == Action.TYPE_EVENT) { Selection.setSelection(mText, start, end); return; } geckoPostToUI(new Runnable() { public void run() { mActionQueue.syncWithGecko(); /* check to see there has not been another action that potentially changed the selection. If so, we can skip this update because we know there is another update right after this one that will replace the effect of this update */ if (mGeckoUpdateSeqno == seqnoWhenPosted) { /* In this case, Gecko's selection has changed and it's notifying us to change Java's selection. In the normal case, whenever Java's selection changes, we go back and set Gecko's selection as well. However, in this case, since Gecko's selection is already up-to-date, we skip this step. */ boolean oldUpdateGecko = mUpdateGecko; mUpdateGecko = false; Selection.setSelection(mProxy, start, end); mUpdateGecko = oldUpdateGecko; } } }); } private void geckoReplaceText(int start, int oldEnd, CharSequence newText) { // Don't use replace() because Gingerbread has a bug where if the replaced text // has the same spans as the original text, the spans will end up being deleted mText.delete(start, oldEnd); mText.insert(start, newText); } @Override public void onTextChange(final String text, final int start, final int unboundedOldEnd, final int unboundedNewEnd) { if (DEBUG) { // GeckoEditableListener methods should all be called from the Gecko thread GeckoApp.assertOnGeckoThread(); } if (start < 0 || start > unboundedOldEnd) { throw new IllegalArgumentException("invalid text notification range"); } /* For the "end" parameters, Gecko can pass in a large number to denote "end of the text". Fix that here */ final int oldEnd = unboundedOldEnd > mText.length() ? mText.length() : unboundedOldEnd; // new end should always match text if (start != 0 && unboundedNewEnd != (start + text.length())) { throw new IllegalArgumentException("newEnd does not match text"); } final int newEnd = start + text.length(); /* Text changes affect the selection as well, and we may not receive another selection update as a result of selection notification masking on the Gecko side; therefore, in order to prevent previous stale selection notifications from occurring, we need to increment the seqno here as well */ ++mGeckoUpdateSeqno; mChangedText.clearSpans(); mChangedText.replace(0, mChangedText.length(), text); // Preserve as many spans as possible TextUtils.copySpansFrom(mText, start, Math.min(oldEnd, newEnd), Object.class, mChangedText, 0); if (!mActionQueue.isEmpty()) { final Action action = mActionQueue.peek(); if (action.mType == Action.TYPE_REPLACE_TEXT && start <= action.mStart && action.mStart + action.mSequence.length() <= newEnd) { // actionNewEnd is the new end of the original replacement action final int actionNewEnd = action.mStart + action.mSequence.length(); int selStart = Selection.getSelectionStart(mText); int selEnd = Selection.getSelectionEnd(mText); // Replace old spans with new spans mChangedText.replace(action.mStart - start, actionNewEnd - start, action.mSequence); geckoReplaceText(start, oldEnd, mChangedText); // delete/insert above might have moved our selection to somewhere else // this happens when the Gecko text change covers a larger range than // the original replacement action. Fix selection here if (selStart >= start && selStart <= oldEnd) { selStart = selStart < action.mStart ? selStart : selStart < action.mEnd ? actionNewEnd : selStart + actionNewEnd - action.mEnd; mText.setSpan(Selection.SELECTION_START, selStart, selStart, Spanned.SPAN_POINT_POINT); } if (selEnd >= start && selEnd <= oldEnd) { selEnd = selEnd < action.mStart ? selEnd : selEnd < action.mEnd ? actionNewEnd : selEnd + actionNewEnd - action.mEnd; mText.setSpan(Selection.SELECTION_END, selEnd, selEnd, Spanned.SPAN_POINT_POINT); } } else { geckoReplaceText(start, oldEnd, mChangedText); } } else { geckoReplaceText(start, oldEnd, mChangedText); } geckoPostToUI(new Runnable() { public void run() { mListener.onTextChange(text, start, oldEnd, newEnd); } }); } // InvocationHandler interface private static StringBuilder debugAppend(StringBuilder sb, Object obj) { if (obj == null) { sb.append("null"); } else if (obj instanceof GeckoEditable) { sb.append("GeckoEditable"); } else if (Proxy.isProxyClass(obj.getClass())) { debugAppend(sb, Proxy.getInvocationHandler(obj)); } else if (obj instanceof CharSequence) { sb.append("\"").append(obj.toString().replace('\n', '\u21b2')).append("\""); } else if (obj.getClass().isArray()) { sb.append(obj.getClass().getComponentType().getSimpleName()).append("[") .append(java.lang.reflect.Array.getLength(obj)).append("]"); } else { sb.append(obj.toString()); } return sb; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { Object target; final Class methodInterface = method.getDeclaringClass(); if (DEBUG) { // Editable methods should all be called from the UI thread GeckoApp.assertOnUiThread(); } if (methodInterface == Editable.class || methodInterface == Appendable.class || methodInterface == Spannable.class) { // Method alters the Editable; route calls to our implementation target = this; } else { // Method queries the Editable; must sync with Gecko first // then call on the inner Editable itself mActionQueue.syncWithGecko(); target = mText; } Object ret; try { ret = method.invoke(target, args); } catch (InvocationTargetException e) { // Bug 817386 // Most likely Gecko has changed the text while GeckoInputConnection is // trying to access the text. If we pass through the exception here, Fennec // will crash due to a lack of exception handler. Log the exception and // return an empty value instead. if (!(e.getCause() instanceof IndexOutOfBoundsException)) { // Only handle IndexOutOfBoundsException for now, // as other exceptions might signal other bugs throw e; } Log.w(LOGTAG, "Exception in GeckoEditable." + method.getName(), e.getCause()); Class retClass = method.getReturnType(); if (retClass != Void.TYPE && retClass.isPrimitive()) { ret = retClass.newInstance(); } else if (retClass == String.class) { ret = ""; } else { ret = null; } } if (DEBUG) { StringBuilder log = new StringBuilder(method.getName()); log.append("("); for (Object arg : args) { debugAppend(log, arg).append(", "); } if (args.length > 0) { log.setLength(log.length() - 2); } if (method.getReturnType().equals(Void.TYPE)) { log.append(")"); } else { debugAppend(log.append(") = "), ret); } Log.d(LOGTAG, log.toString()); } return ret; } // Spannable interface @Override public void removeSpan(Object what) { if (what == Selection.SELECTION_START || what == Selection.SELECTION_END) { Log.w(LOGTAG, "selection removed with removeSpan()"); } if (mText.getSpanStart(what) >= 0) { // only remove if it's there // Okay to remove immediately mText.removeSpan(what); mActionQueue.offer(new Action(Action.TYPE_REMOVE_SPAN)); } } @Override public void setSpan(Object what, int start, int end, int flags) { if (what == Selection.SELECTION_START) { if ((flags & Spanned.SPAN_INTERMEDIATE) != 0) { // We will get the end offset next, just save the start for now mSavedSelectionStart = start; } else { mActionQueue.offer(Action.newSetSelection(start, -1)); } } else if (what == Selection.SELECTION_END) { mActionQueue.offer(Action.newSetSelection(mSavedSelectionStart, end)); mSavedSelectionStart = -1; } else { mActionQueue.offer(Action.newSetSpan(what, start, end, flags)); } } // Appendable interface @Override public Editable append(CharSequence text) { return replace(mProxy.length(), mProxy.length(), text, 0, text.length()); } @Override public Editable append(CharSequence text, int start, int end) { return replace(mProxy.length(), mProxy.length(), text, start, end); } @Override public Editable append(char text) { return replace(mProxy.length(), mProxy.length(), String.valueOf(text), 0, 1); } // Editable interface @Override public InputFilter[] getFilters() { return mFilters; } @Override public void setFilters(InputFilter[] filters) { mFilters = filters; } @Override public void clearSpans() { /* XXX this clears the selection spans too, but there is no way to clear the corresponding selection in Gecko */ Log.w(LOGTAG, "selection cleared with clearSpans()"); mText.clearSpans(); } @Override public Editable replace(int st, int en, CharSequence source, int start, int end) { CharSequence text = source; if (start < 0 || start > end || end > text.length()) { throw new IllegalArgumentException("invalid replace offsets"); } if (start != 0 || end != text.length()) { text = text.subSequence(start, end); } if (mFilters != null) { // Filter text before sending the request to Gecko for (int i = 0; i < mFilters.length; ++i) { final CharSequence cs = mFilters[i].filter( text, 0, text.length(), mProxy, st, en); if (cs != null) { text = cs; } } } if (text == source) { // Always create a copy text = new SpannableString(source); } mActionQueue.offer(Action.newReplaceText(text, Math.min(st, en), Math.max(st, en))); return mProxy; } @Override public void clear() { replace(0, mProxy.length(), "", 0, 0); } @Override public Editable delete(int st, int en) { return replace(st, en, "", 0, 0); } @Override public Editable insert(int where, CharSequence text, int start, int end) { return replace(where, where, text, start, end); } @Override public Editable insert(int where, CharSequence text) { return replace(where, where, text, 0, text.length()); } @Override public Editable replace(int st, int en, CharSequence text) { return replace(st, en, text, 0, text.length()); } /* GetChars interface */ @Override public void getChars(int start, int end, char[] dest, int destoff) { /* overridden Editable interface methods in GeckoEditable must not be called directly outside of GeckoEditable. Instead, the call must go through mProxy, which ensures that Java is properly synchronized with Gecko */ throw new UnsupportedOperationException("method must be called through mProxy"); } /* Spanned interface */ @Override public int getSpanEnd(Object tag) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public int getSpanFlags(Object tag) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public int getSpanStart(Object tag) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public T[] getSpans(int start, int end, Class type) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override @SuppressWarnings("rawtypes") // nextSpanTransition uses raw Class in its Android declaration public int nextSpanTransition(int start, int limit, Class type) { throw new UnsupportedOperationException("method must be called through mProxy"); } /* CharSequence interface */ @Override public char charAt(int index) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public int length() { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public CharSequence subSequence(int start, int end) { throw new UnsupportedOperationException("method must be called through mProxy"); } @Override public String toString() { throw new UnsupportedOperationException("method must be called through mProxy"); } }