tdesktop/Telegram/SourceFiles/ui/effects/numbers_animation.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "ui/effects/numbers_animation.h"
#include "lang/lang_tag.h"
#include "styles/style_widgets.h"
namespace Ui {
NumbersAnimation::NumbersAnimation(
const style::font &font,
Fn<void()> animationCallback)
: _font(font)
, _animationCallback(std::move(animationCallback)) {
for (auto ch = '0'; ch != '9'; ++ch) {
accumulate_max(_digitWidth, _font->m.width(ch));
}
}
void NumbersAnimation::setText(const QString &text, int value) {
if (_a_ready.animating(getms())) {
_delayedText = text;
_delayedValue = value;
} else {
realSetText(text, value);
}
}
void NumbersAnimation::animationCallback() {
if (_animationCallback) {
_animationCallback();
}
if (_widthChangedCallback) {
_widthChangedCallback();
}
if (!_a_ready.animating()) {
if (!_delayedText.isEmpty()) {
setText(_delayedText, _delayedValue);
}
}
}
void NumbersAnimation::realSetText(QString text, int value) {
_delayedText = QString();
_delayedValue = 0;
_growing = (value > _value);
_value = value;
auto newSize = text.size();
while (_digits.size() < newSize) {
_digits.push_front(Digit());
}
while (_digits.size() > newSize && !_digits.front().to.unicode()) {
_digits.pop_front();
}
auto oldSize = _digits.size();
auto animating = false;
for (auto i = 0, size = _digits.size(); i != size; ++i) {
auto &digit = _digits[i];
digit.from = digit.to;
digit.fromWidth = digit.toWidth;
digit.to = (newSize + i < size) ? QChar(0) : text[newSize + i - size];
digit.toWidth = digit.to.unicode() ? _font->m.width(digit.to) : 0;
if (digit.from != digit.to) {
animating = true;
}
if (!digit.from.unicode()) {
--oldSize;
}
}
_fromWidth = oldSize * _digitWidth;
_toWidth = newSize * _digitWidth;
if (animating) {
_a_ready.start(
[this] { animationCallback(); },
0.,
1.,
st::slideWrapDuration);
}
}
int NumbersAnimation::countWidth() const {
return anim::interpolate(
_fromWidth,
_toWidth,
anim::easeOutCirc(1., _a_ready.current(1.)));
}
int NumbersAnimation::maxWidth() const {
return std::max(_fromWidth, _toWidth);
}
void NumbersAnimation::stepAnimation(TimeMs ms) {
_a_ready.step(ms);
}
void NumbersAnimation::finishAnimating() {
auto width = countWidth();
_a_ready.finish();
if (_widthChangedCallback && countWidth() != width) {
_widthChangedCallback();
}
if (!_delayedText.isEmpty()) {
setText(_delayedText, _delayedValue);
}
}
void NumbersAnimation::paint(Painter &p, int x, int y, int outerWidth) {
auto digitsCount = _digits.size();
if (!digitsCount) return;
auto progress = anim::easeOutCirc(1., _a_ready.current(1.));
auto width = anim::interpolate(_fromWidth, _toWidth, progress);
QString singleChar('0');
if (rtl()) x = outerWidth - x - width;
x += width - _digits.size() * _digitWidth;
auto fromTop = anim::interpolate(0, _font->height, progress) * (_growing ? 1 : -1);
auto toTop = anim::interpolate(_font->height, 0, progress) * (_growing ? -1 : 1);
for (auto i = 0; i != digitsCount; ++i) {
auto &digit = _digits[i];
auto from = digit.from;
auto to = digit.to;
if (from == to) {
p.setOpacity(1.);
singleChar[0] = from;
p.drawText(x + (_digitWidth - digit.fromWidth) / 2, y + _font->ascent, singleChar);
} else {
if (from.unicode()) {
p.setOpacity(1. - progress);
singleChar[0] = from;
p.drawText(x + (_digitWidth - digit.fromWidth) / 2, y + fromTop + _font->ascent, singleChar);
}
if (to.unicode()) {
p.setOpacity(progress);
singleChar[0] = to;
p.drawText(x + (_digitWidth - digit.toWidth) / 2, y + toTop + _font->ascent, singleChar);
}
}
x += _digitWidth;
}
p.setOpacity(1.);
}
LabelWithNumbers::LabelWithNumbers(
QWidget *parent,
const style::FlatLabel &st,
int textTop,
const StringWithNumbers &value)
: RpWidget(parent)
, _st(st)
, _textTop(textTop)
, _before(GetBefore(value))
, _after(GetAfter(value))
, _numbers(_st.style.font, [this] { update(); })
, _beforeWidth(_st.style.font->width(_before))
, _afterWidth(st.style.font->width(_after)) {
Expects((value.offset < 0) == (value.length == 0));
const auto numbers = GetNumbers(value);
_numbers.setText(numbers, numbers.toInt());
_numbers.finishAnimating();
}
QString LabelWithNumbers::GetBefore(const StringWithNumbers &value) {
return value.text.mid(0, value.offset);
}
QString LabelWithNumbers::GetAfter(const StringWithNumbers &value) {
return (value.offset >= 0)
? value.text.mid(value.offset + value.length)
: QString();
}
QString LabelWithNumbers::GetNumbers(const StringWithNumbers &value) {
return (value.offset >= 0)
? value.text.mid(value.offset, value.length)
: QString();
}
void LabelWithNumbers::setValue(const StringWithNumbers &value) {
_before = GetBefore(value);
_after = GetAfter(value);
const auto numbers = GetNumbers(value);
_numbers.setText(numbers, numbers.toInt());
const auto oldBeforeWidth = std::exchange(
_beforeWidth,
_st.style.font->width(_before));
_beforeWidthAnimation.start(
[this] { update(); },
oldBeforeWidth,
_beforeWidth,
st::slideWrapDuration,
anim::easeOutCirc);
_afterWidth = _st.style.font->width(_after);
}
void LabelWithNumbers::finishAnimating() {
_beforeWidthAnimation.finish();
_numbers.finishAnimating();
update();
}
void LabelWithNumbers::paintEvent(QPaintEvent *e) {
Painter p(this);
const auto ms = getms();
const auto beforeWidth = _beforeWidthAnimation.current(ms, _beforeWidth);
_numbers.stepAnimation(ms);
p.setFont(_st.style.font);
p.setBrush(Qt::NoBrush);
p.setPen(_st.textFg);
auto left = 0;
const auto outerWidth = width();
p.setClipRect(0, 0, left + beforeWidth, height());
p.drawTextLeft(left, _textTop, outerWidth, _before, _beforeWidth);
left += beforeWidth;
p.setClipping(false);
_numbers.paint(p, left, _textTop, outerWidth);
left += _numbers.countWidth();
const auto availableWidth = outerWidth - left;
const auto text = (availableWidth < _afterWidth)
? _st.style.font->elided(_after, availableWidth)
: _after;
const auto textWidth = (availableWidth < _afterWidth) ? -1 : _afterWidth;
p.drawTextLeft(left, _textTop, outerWidth, text, textWidth);
}
} // namespace Ui
namespace Lang {
Ui::StringWithNumbers ReplaceTag<Ui::StringWithNumbers>::Call(
Ui::StringWithNumbers &&original,
ushort tag,
const Ui::StringWithNumbers &replacement) {
original.offset = FindTagReplacementPosition(original.text, tag);
original.text = ReplaceTag<QString>::Call(
std::move(original.text),
tag,
replacement.text);
original.length = replacement.text.size();
return std::move(original);
}
} // namespace Lang