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/*
* SPDX-FileCopyrightText: 2015-2025 Laurent Montel <montel@kde.org>
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "texteditorcompleter.h"
using namespace Qt::Literals::StringLiterals;
#include <QAbstractItemView>
#include <QCompleter>
#include <QPlainTextEdit>
#include <QScrollBar>
#include <QStringListModel>
#include <QTextEdit>
using namespace TextCustomEditor;
class TextEditorCompleter::TextEditorCompleterPrivate
{
public:
TextEditorCompleterPrivate(QTextEdit *editor, TextEditorCompleter *qq)
: textEdit(editor)
, q(qq)
{
createCompleter();
}
TextEditorCompleterPrivate(QPlainTextEdit *editor, TextEditorCompleter *qq)
: plainTextEdit(editor)
, q(qq)
{
createCompleter();
}
void setCompletion(const QString &completion);
[[nodiscard]] QString wordUnderCursor() const;
void createCompleter();
void completeText();
QString excludeOfCharacters;
QCompleter *completer = nullptr;
QPlainTextEdit *plainTextEdit = nullptr;
QTextEdit *textEdit = nullptr;
TextEditorCompleter *const q;
};
void TextEditorCompleter::TextEditorCompleterPrivate::createCompleter()
{
if (!completer) {
completer = new QCompleter(q);
}
if (plainTextEdit) {
completer->setWidget(plainTextEdit);
} else {
completer->setWidget(textEdit);
}
completer->setModelSorting(QCompleter::CaseSensitivelySortedModel);
completer->setCaseSensitivity(Qt::CaseInsensitive);
completer->setCompletionMode(QCompleter::PopupCompletion);
connect(completer, qOverload<const QString &>(&QCompleter::activated), q, &TextEditorCompleter::slotCompletion);
}
QString TextEditorCompleter::TextEditorCompleterPrivate::wordUnderCursor() const
{
static QString eow = u"~!@#$%^&*()+{}|\"<>,./;'[]\\-= "_s; // everything without ':', '?' and '_'
QTextCursor tc;
QTextDocument *document = nullptr;
if (plainTextEdit) {
tc = plainTextEdit->textCursor();
document = plainTextEdit->document();
} else {
tc = textEdit->textCursor();
document = textEdit->document();
}
tc.anchor();
const QString eowStr = excludeOfCharacters.isEmpty() ? eow : excludeOfCharacters;
while (true) {
// vHanda: I don't understand why the cursor seems to give a pos 1 past the last char instead
// of just the last char.
int pos = tc.position() - 1;
if (pos < 0 || eowStr.contains(document->characterAt(pos)) || document->characterAt(pos) == QChar(QChar::LineSeparator)
|| document->characterAt(pos) == QChar(QChar::ParagraphSeparator)) {
break;
}
tc.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor);
}
return tc.selectedText();
}
void TextEditorCompleter::TextEditorCompleterPrivate::setCompletion(const QString &completion)
{
QTextCursor tc;
if (plainTextEdit) {
tc = plainTextEdit->textCursor();
} else {
tc = textEdit->textCursor();
}
const int extra = completion.length() - completer->completionPrefix().length();
tc.movePosition(QTextCursor::Left);
tc.movePosition(QTextCursor::EndOfWord);
tc.insertText(completion.right(extra));
if (plainTextEdit) {
plainTextEdit->setTextCursor(tc);
} else {
textEdit->setTextCursor(tc);
}
}
void TextEditorCompleter::TextEditorCompleterPrivate::completeText()
{
if (!completer) {
return;
}
const QString text = wordUnderCursor();
if (text.length() < 2) { // min 2 char for completion
return;
}
completer->setCompletionPrefix(text);
QRect cr;
if (plainTextEdit) {
cr = plainTextEdit->cursorRect();
} else {
cr = textEdit->cursorRect();
}
cr.setWidth(completer->popup()->sizeHintForColumn(0) + completer->popup()->verticalScrollBar()->sizeHint().width());
completer->complete(cr);
}
TextEditorCompleter::TextEditorCompleter(QTextEdit *editor, QObject *parent)
: QObject(parent)
, d(new TextEditorCompleter::TextEditorCompleterPrivate(editor, this))
{
}
TextEditorCompleter::TextEditorCompleter(QPlainTextEdit *editor, QObject *parent)
: QObject(parent)
, d(new TextEditorCompleter::TextEditorCompleterPrivate(editor, this))
{
}
TextEditorCompleter::~TextEditorCompleter() = default;
QCompleter *TextEditorCompleter::completer() const
{
return d->completer;
}
void TextEditorCompleter::setCompleterStringList(const QStringList &listWord)
{
d->completer->setModel(new QStringListModel(QStringList() << listWord << u"TESTING"_s, d->completer));
}
void TextEditorCompleter::slotCompletion(const QString &completion)
{
d->setCompletion(completion);
}
void TextEditorCompleter::completeText()
{
d->completeText();
}
void TextEditorCompleter::setExcludeOfCharacters(const QString &excludes)
{
d->excludeOfCharacters = excludes;
}
#include "moc_texteditorcompleter.cpp"
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