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fix 9713c4a25a not working when word ends with two equal codepoints

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Helium314 2023-09-13 18:05:18 +02:00
parent c78e729daa
commit 8fbb0ce0c7
2 changed files with 52 additions and 40 deletions
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88
app/src/main/java/org/dslul/openboard/inputmethod/latin/RichInputConnection.java
View file

@ -699,7 +699,7 @@ public final class RichInputConnection implements PrivateCommandPerformer {
* @return a range containing the text surrounding the cursor
*/
public TextRange getWordRangeAtCursor(final SpacingAndPunctuations spacingAndPunctuations,
final int scriptId) {
final int scriptId, final boolean justDeleted) {
mIC = mParent.getCurrentInputConnection();
if (!isConnected()) {
return null;
@ -718,43 +718,24 @@ public final class RichInputConnection implements PrivateCommandPerformer {
return null;
}
// issue:
// type 2 words and space, press delete twice -> remaining word and space before are selected
// now on next key press, the space before the word is removed
// or complete a word by choosing a suggestion than press backspace -> same thing
// what is sometimes happening (depending on app, or maybe input field attributes):
// we just pressed delete, and getTextBeforeCursor gets the correct text,
// but getTextBeforeCursorAndDetectLaggyConnection returns the old word, before the deletion (not sure why)
// -> we try to detect this difference, and then try to fix it
// interestingly, getTextBeforeCursor seems to only get the correct text because it uses
// mCommittedTextBeforeComposingText where the text is cached
// what could be actually going on? we probably need to fetch the text because we want updated styles if any
// we need text before, and text after is always empty or a separator or similar
if (before.length() > 0 && (after.length() == 0 || !isPartOfCompositionForScript(Character.codePointAt(after, 0), spacingAndPunctuations, scriptId))) {
final int lastBeforeCodePoint = Character.codePointBefore(before, before.length());
// check whether before ends with the same codepoint as getTextBeforeCursor
int lastBeforeLength = Character.charCount(lastBeforeCodePoint);
CharSequence codePointBeforeCursor = getTextBeforeCursor(lastBeforeLength, 0);
if (codePointBeforeCursor.length() != 0 && Character.codePointAt(codePointBeforeCursor, 0) != lastBeforeCodePoint) {
// they are different, as is expected from the issue
// now check whether they are the same if the last codepoint of before is removed
final CharSequence beforeWithoutLast = before.subSequence(0, before.length() - lastBeforeLength);
final CharSequence beforeCursor = getTextBeforeCursor(beforeWithoutLast.length(), 0);
if (beforeCursor.length() == beforeWithoutLast.length()) {
boolean same = true;
// CharSequence has undefined equals, so we need to compare characters
for (int i = 0; i < beforeCursor.length(); i++) {
if (beforeCursor.charAt(i) != beforeWithoutLast.charAt(i)) {
same = false;
break;
}
}
if (same) {
before = beforeWithoutLast;
}
}
}
// we need text before, and text after is either empty or a separator or similar
if (justDeleted && before.length() > 0 &&
(after.length() == 0
|| !isPartOfCompositionForScript(Character.codePointAt(after, 0), spacingAndPunctuations, scriptId)
)
) {
// issue:
// type 2 words and space, press delete twice -> remaining word and space before are selected
// now on next key press, the space before the word is removed
// or complete a word by choosing a suggestion, then press backspace -> same thing
// what is sometimes happening (depending on app, or maybe input field attributes):
// we just pressed delete, and getTextBeforeCursor gets the correct text,
// but getTextBeforeCursorAndDetectLaggyConnection returns the old word, before the deletion (not sure why)
// -> we try to detect this difference, and then try to fix it
// interestingly, getTextBeforeCursor seems to only get the correct text because it uses
// mCommittedTextBeforeComposingText, where the text is cached
// what could be actually going on? we probably need to fetch the text, because we want updated styles (if any)
before = fixIncorrectLength(before);
}
// Going backward, find the first breaking point (separator)
@ -794,6 +775,37 @@ public final class RichInputConnection implements PrivateCommandPerformer {
hasUrlSpans);
}
// mostly fixes an issue where the space before the word is selected after deleting a codepoint,
// because the text length is not yet updated in the field (i.e. trying to select "word length"
// before cursor, but the last letter has just been deleted and thus the space before is also selected)
private CharSequence fixIncorrectLength(final CharSequence before) {
// don't use codepoints, just do the simple thing...
int initialCheckLength = Math.min(3, before.length());
// this should have been checked before calling this method, but better be safe
if (initialCheckLength == 0) return before;
final CharSequence lastCharsInBefore = before.subSequence(before.length() - initialCheckLength, before.length());
final CharSequence lastCharsBeforeCursor = getTextBeforeCursor(initialCheckLength, 0);
// if the last 3 chars are equal, we can be relatively sure to not have this bug (can still be e.g. rrrr, which is not detected)
// (we could also check everything though, it's just a little slower)
if (TextUtils.equals(lastCharsInBefore, lastCharsBeforeCursor)) return before;
// delete will hopefully have deleted a codepoint, not only a char
// we want to compare whether the text before the cursor is the same as "before" without
// the last codepoint. if yes, return "before" without the last codepoint
final int lastBeforeCodePoint = Character.codePointBefore(before, before.length());
int lastBeforeLength = Character.charCount(lastBeforeCodePoint);
final CharSequence codePointBeforeCursor = getTextBeforeCursor(lastBeforeLength, 0);
if (codePointBeforeCursor.length() == 0) return before;
// now check whether they are the same if the last codepoint of before is removed
final CharSequence beforeWithoutLast = before.subSequence(0, before.length() - lastBeforeLength);
final CharSequence beforeCursor = getTextBeforeCursor(beforeWithoutLast.length(), 0);
if (beforeCursor.length() != beforeWithoutLast.length()) return before;
if (TextUtils.equals(beforeCursor, beforeWithoutLast))
return beforeWithoutLast;
return before;
}
public boolean isCursorTouchingWord(final SpacingAndPunctuations spacingAndPunctuations,
boolean checkTextAfter) {
if (checkTextAfter && isCursorFollowedByWordCharacter(spacingAndPunctuations)) {

4
app/src/main/java/org/dslul/openboard/inputmethod/latin/inputlogic/InputLogic.java
View file

@ -1255,7 +1255,7 @@ public final class InputLogic {
&& settingsValues.mSpacingAndPunctuations.mCurrentLanguageHasSpaces) {
final TextRange range = mConnection.getWordRangeAtCursor(
settingsValues.mSpacingAndPunctuations,
currentKeyboardScriptId);
currentKeyboardScriptId, false);
if (range != null) {
return range.mWord.toString();
}
@ -1603,7 +1603,7 @@ public final class InputLogic {
return;
}
final TextRange range = mConnection.getWordRangeAtCursor(
settingsValues.mSpacingAndPunctuations, currentKeyboardScriptId);
settingsValues.mSpacingAndPunctuations, currentKeyboardScriptId, true);
if (null == range) return; // Happens if we don't have an input connection at all
if (range.length() <= 0) {
// Race condition, or touching a word in a non-supported script.