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implement workaround for broken word under cursor selection in QTextCursor class

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This commit is contained in:
Axel Kohlmeyer
2023-09-02 09:44:13 -04:00
parent 4d409906fe
commit 98b803eba9
1 changed files with 26 additions and 12 deletions
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38
tools/lammps-gui/codeeditor.cpp
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@ -389,22 +389,22 @@ void CodeEditor::keyPressEvent(QKeyEvent *event)
reformatCurrentLine();
}
// pass key event to parent class
// process key event in parent class
QPlainTextEdit::keyPressEvent(event);
// if enabled, do pop up completion automatically after 3 characters
// if enabled, try pop up completion automatically after 3 characters
if (automatic_completion) {
auto cursor = textCursor();
auto line = cursor.block().text();
// QTextCursor::WordUnderCursor recognizes '/' as word boundary.
// Work around it by search to beginning of word since we only need the length
// QTextCursor::WordUnderCursor is unusable here since recognizes '/' as word boundary.
// Work around it by manually searching for the location of the beginning of the word.
int begin = cursor.positionInBlock();
while (begin >= 0) {
if (line[begin].isSpace()) break;
--begin;
}
if ((cursor.positionInBlock() - begin) > 2) runCompletion();
if ((cursor.positionInBlock() - begin) > 3) runCompletion();
}
}
@ -555,14 +555,28 @@ void CodeEditor::runCompletion()
{
auto cursor = textCursor();
auto line = cursor.block().text().trimmed();
// no completion possible on empty lines
if (line.isEmpty()) return;
auto words = split_line(line.toStdString());
// FIXME. need a workaround for broken WordUnderCursor here
cursor.select(QTextCursor::WordUnderCursor);
// QTextCursor::WordUnderCursor is unusable here since it recognizes '/' as word boundary.
// Work around it by manually searching for the beginning and end position of the word
// under the cursor and then using that substring.
int begin = cursor.positionInBlock();
line = cursor.block().text();
while (begin >= 0) {
if (line[begin].isSpace()) break;
--begin;
}
int end = ++begin;
while (end < line.length()) {
if (line[end].isSpace()) break;
++end;
}
const auto selected = line.mid(begin, end - begin);
// if on first word, try to complete command
if ((words.size() > 0) && (words[0] == cursor.selectedText().toStdString())) {
if ((words.size() > 0) && (words[0] == selected.toStdString())) {
// no completion on comment lines
if (words[0][0] == '#') return;
@ -583,7 +597,7 @@ void CodeEditor::runCompletion()
current_comp->complete(cr);
// completions for second word
} else if ((words.size() > 1) && (words[1] == cursor.selectedText().toStdString())) {
} else if ((words.size() > 1) && (words[1] == selected.toStdString())) {
// no completion on comment lines
if (words[0][0] == '#') return;
@ -622,7 +636,7 @@ void CodeEditor::runCompletion()
current_comp->complete(cr);
}
// completions for third word
} else if ((words.size() > 2) && (words[2] == cursor.selectedText().toStdString())) {
} else if ((words.size() > 2) && (words[2] == selected.toStdString())) {
// no completion on comment lines
if (words[0][0] == '#') return;
@ -647,7 +661,7 @@ void CodeEditor::runCompletion()
current_comp->complete(cr);
}
// completions for fourth word
} else if ((words.size() > 3) && (words[3] == cursor.selectedText().toStdString())) {
} else if ((words.size() > 3) && (words[3] == selected.toStdString())) {
// no completion on comment lines
if (words[0][0] == '#') return;