Feather, a free Monero desktop wallet

Co-Authored-By: tobtoht <thotbot@protonmail.com>
2026-10-22 01:28:43 +02:00 · 2020-10-08 04:31:22 +02:00
commit 133700160a
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "textedit.h"
+#include <QCompleter>
+#include <QKeyEvent>
+#include <QAbstractItemView>
+#include <QtDebug>
+#include <QApplication>
+#include <QModelIndex>
+#include <QAbstractItemModel>
+#include <QScrollBar>
+
+
+TextEdit::TextEdit(QWidget *parent) : QTextEdit(parent) { }
+
+TextEdit::~TextEdit() { }
+
+void TextEdit::setCompleter(QCompleter *completer) {
+    if (c)
+        c->disconnect(this);
+
+    c = completer;
+
+    if (!c)
+        return;
+
+    c->setWidget(this);
+    c->setCompletionMode(QCompleter::PopupCompletion);
+    c->setCaseSensitivity(Qt::CaseInsensitive);
+    QObject::connect(c, QOverload<const QString &>::of(&QCompleter::activated),
+                     this, &TextEdit::insertCompletion);
+}
+
+QCompleter *TextEdit::completer() const {
+    return c;
+}
+
+void TextEdit::insertCompletion(const QString &completion) {
+    if (c->widget() != this)
+        return;
+    QTextCursor tc = textCursor();
+    int extra = completion.length() - c->completionPrefix().length();
+    tc.movePosition(QTextCursor::Left);
+    tc.movePosition(QTextCursor::EndOfWord);
+    tc.insertText(completion.right(extra));
+    setTextCursor(tc);
+}
+
+QString TextEdit::textUnderCursor() const {
+    QTextCursor tc = textCursor();
+    tc.select(QTextCursor::WordUnderCursor);
+    return tc.selectedText();
+}
+
+void TextEdit::focusInEvent(QFocusEvent *e) {
+    if (c)
+        c->setWidget(this);
+    QTextEdit::focusInEvent(e);
+}
+
+void TextEdit::keyPressEvent(QKeyEvent *e) {
+    if (c && c->popup()->isVisible()) {
+        // The following keys are forwarded by the completer to the widget
+       switch (e->key()) {
+       case Qt::Key_Enter:
+       case Qt::Key_Return:
+       case Qt::Key_Escape:
+       case Qt::Key_Tab:
+       case Qt::Key_Backtab:
+            e->ignore();
+            return; // let the completer do default behavior
+       default:
+           break;
+       }
+    }
+
+    const bool isShortcut = (e->modifiers().testFlag(Qt::ControlModifier) && e->key() == Qt::Key_E); // CTRL+E
+    if (!c || !isShortcut) // do not process the shortcut when we have a completer
+        QTextEdit::keyPressEvent(e);
+
+    const bool ctrlOrShift = e->modifiers().testFlag(Qt::ControlModifier) ||
+                             e->modifiers().testFlag(Qt::ShiftModifier);
+    if (!c || (ctrlOrShift && e->text().isEmpty()))
+        return;
+
+    static QString eow("~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="); // end of word
+    const bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift;
+    QString completionPrefix = textUnderCursor();
+
+    if (!isShortcut && (hasModifier || e->text().isEmpty()|| completionPrefix.length() < 3
+                      || eow.contains(e->text().right(1)))) {
+        c->popup()->hide();
+        return;
+    }
+
+    if (completionPrefix != c->completionPrefix()) {
+        c->setCompletionPrefix(completionPrefix);
+        c->popup()->setCurrentIndex(c->completionModel()->index(0, 0));
+    }
+    QRect cr = cursorRect();
+    cr.setWidth(c->popup()->sizeHintForColumn(0)
+                + c->popup()->verticalScrollBar()->sizeHint().width());
+    c->complete(cr); // popup it up!
+}
+
+QAbstractItemModel *TextEdit::modelFromFile(const QString& fileName, QCompleter *completer) {
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly))
+        return new QStringListModel(completer);
+
+    QStringList words;
+
+    while (!file.atEnd()) {
+        QByteArray line = file.readLine();
+        if (!line.isEmpty())
+            words << QString::fromUtf8(line.trimmed());
+    }
+
+    return new QStringListModel(words, completer);
+}