mirror of
https://github.com/Lime3DS/Lime3DS
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282 lines
9.6 KiB
C++
282 lines
9.6 KiB
C++
// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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// Copyright 2014 Tony Wasserka
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the owner nor the names of its contributors may
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// be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <cstdlib>
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#include <QLineEdit>
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#include <QRegularExpression>
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#include "citra_qt/util/spinbox.h"
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#include "common/assert.h"
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CSpinBox::CSpinBox(QWidget* parent)
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: QAbstractSpinBox(parent), min_value(-100), max_value(100), value(0), base(10), num_digits(0) {
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// TODO: Might be nice to not immediately call the slot.
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// Think of an address that is being replaced by a different one, in which case a lot
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// invalid intermediate addresses would be read from during editing.
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connect(lineEdit(), &QLineEdit::textEdited, this, &CSpinBox::OnEditingFinished);
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UpdateText();
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}
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void CSpinBox::SetValue(qint64 val) {
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auto old_value = value;
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value = std::max(std::min(val, max_value), min_value);
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if (old_value != value) {
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UpdateText();
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emit ValueChanged(value);
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}
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}
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void CSpinBox::SetRange(qint64 min, qint64 max) {
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min_value = min;
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max_value = max;
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SetValue(value);
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UpdateText();
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}
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void CSpinBox::stepBy(int steps) {
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auto new_value = value;
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// Scale number of steps by the currently selected digit
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// TODO: Move this code elsewhere and enable it.
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// TODO: Support for num_digits==0, too
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// TODO: Support base!=16, too
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// TODO: Make the cursor not jump back to the end of the line...
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/*if (base == 16 && num_digits > 0) {
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int digit = num_digits - (lineEdit()->cursorPosition() - prefix.length()) - 1;
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digit = std::max(0, std::min(digit, num_digits - 1));
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steps <<= digit * 4;
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}*/
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// Increment "new_value" by "steps", and perform annoying overflow checks, too.
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constexpr qint64 qint64_min = std::numeric_limits<qint64>::min();
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constexpr qint64 qint64_max = std::numeric_limits<qint64>::max();
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if (steps < 0 && new_value < qint64_min - steps) {
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new_value = qint64_min;
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} else if (steps > 0 && new_value > qint64_max - steps) {
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new_value = qint64_max;
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} else {
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new_value += steps;
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}
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SetValue(new_value);
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UpdateText();
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}
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QAbstractSpinBox::StepEnabled CSpinBox::stepEnabled() const {
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StepEnabled ret = StepNone;
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if (value > min_value)
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ret |= StepDownEnabled;
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if (value < max_value)
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ret |= StepUpEnabled;
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return ret;
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}
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void CSpinBox::SetBase(int base) {
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this->base = base;
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UpdateText();
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}
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void CSpinBox::SetNumDigits(int num_digits) {
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this->num_digits = num_digits;
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UpdateText();
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}
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void CSpinBox::SetPrefix(const QString& prefix) {
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this->prefix = prefix;
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UpdateText();
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}
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void CSpinBox::SetSuffix(const QString& suffix) {
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this->suffix = suffix;
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UpdateText();
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}
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static QString StringToInputMask(const QString& input) {
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QString mask = input;
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// ... replace any special characters by their escaped counterparts ...
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mask.replace(QStringLiteral("\\"), QStringLiteral("\\\\"));
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mask.replace(QLatin1Char{'A'}, QStringLiteral("\\A"));
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mask.replace(QLatin1Char{'a'}, QStringLiteral("\\a"));
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mask.replace(QLatin1Char{'N'}, QStringLiteral("\\N"));
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mask.replace(QLatin1Char{'n'}, QStringLiteral("\\n"));
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mask.replace(QLatin1Char{'X'}, QStringLiteral("\\X"));
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mask.replace(QLatin1Char{'x'}, QStringLiteral("\\x"));
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mask.replace(QLatin1Char{'9'}, QStringLiteral("\\9"));
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mask.replace(QLatin1Char{'0'}, QStringLiteral("\\0"));
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mask.replace(QLatin1Char{'D'}, QStringLiteral("\\D"));
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mask.replace(QLatin1Char{'d'}, QStringLiteral("\\d"));
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mask.replace(QLatin1Char{'#'}, QStringLiteral("\\#"));
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mask.replace(QLatin1Char{'H'}, QStringLiteral("\\H"));
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mask.replace(QLatin1Char{'h'}, QStringLiteral("\\h"));
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mask.replace(QLatin1Char{'B'}, QStringLiteral("\\B"));
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mask.replace(QLatin1Char{'b'}, QStringLiteral("\\b"));
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mask.replace(QLatin1Char{'>'}, QStringLiteral("\\>"));
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mask.replace(QLatin1Char{'<'}, QStringLiteral("\\<"));
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mask.replace(QLatin1Char{'!'}, QStringLiteral("\\!"));
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return mask;
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}
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void CSpinBox::UpdateText() {
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// If a fixed number of digits is used, we put the line edit in insertion mode by setting an
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// input mask.
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QString mask;
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if (num_digits != 0) {
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mask += StringToInputMask(prefix);
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// For base 10 and negative range, demand a single sign character
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if (HasSign())
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mask.append(QLatin1Char{'X'}); // identified as "-" or "+" in the validator
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// Uppercase digits greater than 9.
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mask.append(QLatin1Char{'>'});
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// Match num_digits digits
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// Digits irrelevant to the chosen number base are filtered in the validator
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mask.append(QStringLiteral("H").repeated(std::max(num_digits, 1)));
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// Switch off case conversion
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mask.append(QLatin1Char{'!'});
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mask.append(StringToInputMask(suffix));
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}
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lineEdit()->setInputMask(mask);
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// Set new text without changing the cursor position. This will cause the cursor to briefly
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// appear at the end of the line and then to jump back to its original position. That's
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// a bit ugly, but better than having setText() move the cursor permanently all the time.
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int cursor_position = lineEdit()->cursorPosition();
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lineEdit()->setText(TextFromValue());
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lineEdit()->setCursorPosition(cursor_position);
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}
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QString CSpinBox::TextFromValue() {
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return prefix +
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(HasSign() ? ((value < 0) ? QStringLiteral("-") : QStringLiteral("+")) : QString{}) +
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QStringLiteral("%1").arg(std::abs(value), num_digits, base, QLatin1Char('0')).toUpper() +
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suffix;
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}
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qint64 CSpinBox::ValueFromText() {
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unsigned strpos = prefix.length();
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QString num_string = text().mid(strpos, text().length() - strpos - suffix.length());
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return num_string.toLongLong(nullptr, base);
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}
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bool CSpinBox::HasSign() const {
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return base == 10 && min_value < 0;
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}
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void CSpinBox::OnEditingFinished() {
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// Only update for valid input
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QString input = lineEdit()->text();
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int pos = 0;
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if (QValidator::Acceptable == validate(input, pos))
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SetValue(ValueFromText());
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}
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QValidator::State CSpinBox::validate(QString& input, int& pos) const {
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if (!prefix.isEmpty() && input.left(prefix.length()) != prefix)
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return QValidator::Invalid;
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int strpos = prefix.length();
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// Empty "numbers" allowed as intermediate values
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if (strpos >= input.length() - HasSign() - suffix.length())
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return QValidator::Intermediate;
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DEBUG_ASSERT(base <= 10 || base == 16);
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QString regexp;
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// Demand sign character for negative ranges
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if (HasSign())
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regexp.append(QStringLiteral("[+\\-]"));
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// Match digits corresponding to the chosen number base.
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regexp.append(QStringLiteral("[0-%1").arg(std::min(base, 9)));
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if (base == 16) {
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regexp.append(QStringLiteral("a-fA-F"));
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}
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regexp.append(QLatin1Char(']'));
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// Specify number of digits
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if (num_digits > 0) {
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regexp.append(QStringLiteral("{%1}").arg(num_digits));
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} else {
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regexp.append(QLatin1Char{'+'});
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}
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// Match string
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QRegularExpression num_regexp(QRegularExpression::anchoredPattern(regexp));
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int num_pos = strpos;
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QString sub_input = input.mid(strpos, input.length() - strpos - suffix.length());
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auto match = num_regexp.match(sub_input);
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if (!match.hasMatch())
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return QValidator::Invalid;
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sub_input = sub_input.left(match.capturedLength());
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bool ok;
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qint64 val = sub_input.toLongLong(&ok, base);
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if (!ok)
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return QValidator::Invalid;
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// Outside boundaries => don't accept
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if (val < min_value || val > max_value)
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return QValidator::Invalid;
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// Make sure we are actually at the end of this string...
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strpos += match.capturedLength();
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if (!suffix.isEmpty() && input.mid(strpos) != suffix) {
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return QValidator::Invalid;
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} else {
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strpos += suffix.length();
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}
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if (strpos != input.length())
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return QValidator::Invalid;
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// At this point we can say for sure that the input is fine. Let's fix it up a bit though
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input.replace(num_pos, sub_input.length(), sub_input.toUpper());
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return QValidator::Acceptable;
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}
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