tdesktop/Telegram/SourceFiles/ui/chat/message_bar.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/chat/message_bar.h"
#include "ui/text/text_options.h"
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#include "ui/image/image_prepare.h"
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#include "styles/style_chat.h"
#include "styles/palette.h"
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namespace Ui {
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namespace {
[[nodiscard]] int SameFirstPartLength(const QString &a, const QString &b) {
const auto [i, j] = ranges::mismatch(a, b);
return (i - a.begin());
}
[[nodiscard]] bool MuchDifferent(
int same,
const QString &a,
const QString &b) {
return (same * 2 < a.size()) || (same * 2 < b.size());
}
[[nodiscard]] bool MuchDifferent(const QString &a, const QString &b) {
return MuchDifferent(SameFirstPartLength(a, b), a, b);
}
[[nodiscard]] bool ComplexTitleAnimation(
int same,
const QString &a,
const QString &b) {
return !MuchDifferent(same, a, b)
&& (same != a.size() || same != b.size());
}
} // namespace
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MessageBar::MessageBar(not_null<QWidget*> parent, const style::MessageBar &st)
: _st(st)
, _widget(parent) {
setup();
style::PaletteChanged(
) | rpl::start_with_next([=] {
_topBarGradient = _bottomBarGradient = QPixmap();
}, _widget.lifetime());
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}
void MessageBar::setup() {
_widget.resize(0, st::historyReplyHeight);
_widget.paintRequest(
) | rpl::start_with_next([=](QRect rect) {
auto p = Painter(&_widget);
paint(p);
}, _widget.lifetime());
}
void MessageBar::set(MessageBarContent &&content) {
_contentLifetime.destroy();
tweenTo(std::move(content));
}
void MessageBar::set(rpl::producer<MessageBarContent> content) {
_contentLifetime.destroy();
std::move(
content
) | rpl::start_with_next([=](MessageBarContent &&content) {
tweenTo(std::move(content));
}, _contentLifetime);
}
MessageBar::BodyAnimation MessageBar::DetectBodyAnimationType(
Animation *currentAnimation,
const MessageBarContent &currentContent,
const MessageBarContent &nextContent) {
const auto now = currentAnimation
? currentAnimation->bodyAnimation
: BodyAnimation::None;
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const auto somethingChanged = (currentContent.text != nextContent.text)
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|| (currentContent.title != nextContent.title)
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|| (currentContent.index != nextContent.index)
|| (currentContent.count != nextContent.count);
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return (now == BodyAnimation::Full
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|| MuchDifferent(currentContent.title, nextContent.title)
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|| (currentContent.title.isEmpty() && somethingChanged))
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? BodyAnimation::Full
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: (now == BodyAnimation::Text || somethingChanged)
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? BodyAnimation::Text
: BodyAnimation::None;
}
void MessageBar::tweenTo(MessageBarContent &&content) {
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Expects(content.count > 0);
Expects(content.index >= 0 && content.index < content.count);
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_widget.update();
if (!_st.duration || anim::Disabled() || _widget.size().isEmpty()) {
updateFromContent(std::move(content));
return;
}
const auto hasImageChanged = (_content.preview.isNull()
!= content.preview.isNull());
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const auto bodyChanged = (_content.index != content.index
|| _content.count != content.count
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|| _content.title != content.title
|| _content.text != content.text
|| _content.preview.constBits() != content.preview.constBits());
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const auto barCountChanged = (_content.count != content.count);
const auto barFrom = _content.index;
const auto barTo = content.index;
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auto animation = Animation();
animation.bodyAnimation = DetectBodyAnimationType(
_animation.get(),
_content,
content);
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animation.movingTo = (content.index > _content.index)
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? RectPart::Top
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: (content.index < _content.index)
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? RectPart::Bottom
: RectPart::None;
animation.imageFrom = grabImagePart();
animation.bodyOrTextFrom = grabBodyOrTextPart(animation.bodyAnimation);
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const auto sameLength = SameFirstPartLength(
_content.title,
content.title);
if (animation.bodyAnimation == BodyAnimation::Text
&& ComplexTitleAnimation(sameLength, _content.title, content.title)) {
animation.titleSame = grabTitleBase(sameLength);
animation.titleFrom = grabTitlePart(sameLength);
}
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auto was = std::move(_animation);
updateFromContent(std::move(content));
animation.imageTo = grabImagePart();
animation.bodyOrTextTo = grabBodyOrTextPart(animation.bodyAnimation);
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if (!animation.titleSame.isNull()) {
animation.titleTo = grabTitlePart(sameLength);
}
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if (was) {
_animation = std::move(was);
std::swap(*_animation, animation);
_animation->imageShown = std::move(animation.imageShown);
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_animation->barScroll = std::move(animation.barScroll);
_animation->barTop = std::move(animation.barTop);
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} else {
_animation = std::make_unique<Animation>(std::move(animation));
}
if (hasImageChanged) {
_animation->imageShown.start(
[=] { _widget.update(); },
_image.isNull() ? 1. : 0.,
_image.isNull() ? 0. : 1.,
_st.duration);
}
if (bodyChanged) {
_animation->bodyMoved.start(
[=] { _widget.update(); },
0.,
1.,
_st.duration);
}
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if (barCountChanged) {
_animation->barScroll.stop();
_animation->barTop.stop();
} else if (barFrom != barTo) {
const auto wasState = countBarState(barFrom);
const auto nowState = countBarState(barTo);
_animation->barScroll.start(
[=] { _widget.update(); },
wasState.scroll,
nowState.scroll,
_st.duration);
_animation->barTop.start(
[] {},
wasState.offset,
nowState.offset,
_st.duration);
}
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}
void MessageBar::updateFromContent(MessageBarContent &&content) {
_content = std::move(content);
_title.setText(_st.title, _content.title);
_text.setMarkedText(_st.text, _content.text, Ui::DialogTextOptions());
_image = prepareImage(_content.preview);
}
QRect MessageBar::imageRect() const {
const auto left = st::msgReplyBarSkip + st::msgReplyBarSkip;
const auto top = st::msgReplyPadding.top();
const auto size = st::msgReplyBarSize.height();
return QRect(left, top, size, size);
}
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QRect MessageBar::titleRangeRect(int from, int till) const {
auto result = bodyRect();
result.setHeight(st::msgServiceNameFont->height);
const auto left = from
? st::msgServiceNameFont->width(_content.title.mid(0, from))
: 0;
const auto right = (till <= _content.title.size())
? st::msgServiceNameFont->width(_content.title.mid(0, till))
: result.width();
result.setLeft(result.left() + left);
result.setWidth(right - left);
return result;
}
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QRect MessageBar::bodyRect(bool withImage) const {
const auto innerLeft = st::msgReplyBarSkip + st::msgReplyBarSkip;
const auto imageSkip = st::msgReplyBarSize.height()
+ st::msgReplyBarSkip
- st::msgReplyBarSize.width()
- st::msgReplyBarPos.x();
const auto left = innerLeft + (withImage ? imageSkip : 0);
const auto top = st::msgReplyPadding.top();
const auto width = _widget.width() - left - st::msgReplyPadding.right();
const auto height = st::msgReplyBarSize.height();
return QRect(left, top, width, height);
}
QRect MessageBar::bodyRect() const {
return bodyRect(!_image.isNull());
}
QRect MessageBar::textRect() const {
auto result = bodyRect();
result.setTop(result.top() + st::msgServiceNameFont->height);
return result;
}
auto MessageBar::makeGrabGuard() {
auto imageShown = _animation
? std::move(_animation->imageShown)
: Ui::Animations::Simple();
return gsl::finally([&, shown = std::move(imageShown)]() mutable {
if (_animation) {
_animation->imageShown = std::move(shown);
}
});
}
QPixmap MessageBar::grabBodyOrTextPart(BodyAnimation type) {
return (type == BodyAnimation::Full)
? grabBodyPart()
: (type == BodyAnimation::Text)
? grabTextPart()
: QPixmap();
}
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QPixmap MessageBar::grabTitleBase(int till) {
return grabTitleRange(0, till);
}
QPixmap MessageBar::grabTitlePart(int from) {
Expects(from <= _content.title.size());
return grabTitleRange(from, _content.title.size());
}
QPixmap MessageBar::grabTitleRange(int from, int till) {
const auto guard = makeGrabGuard();
return GrabWidget(widget(), titleRangeRect(from, till));
}
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QPixmap MessageBar::grabBodyPart() {
const auto guard = makeGrabGuard();
return GrabWidget(widget(), bodyRect());
}
QPixmap MessageBar::grabTextPart() {
const auto guard = makeGrabGuard();
return GrabWidget(widget(), textRect());
}
QPixmap MessageBar::grabImagePart() {
if (!_animation) {
return _image;
}
const auto guard = makeGrabGuard();
return (_animation->bodyMoved.animating()
&& !_animation->imageFrom.isNull()
&& !_animation->imageTo.isNull())
? GrabWidget(widget(), imageRect())
: _animation->imageFrom;
}
void MessageBar::finishAnimating() {
if (_animation) {
_animation = nullptr;
_widget.update();
}
}
QPixmap MessageBar::prepareImage(const QImage &preview) {
return QPixmap::fromImage(preview, Qt::ColorOnly);
}
void MessageBar::paint(Painter &p) {
const auto progress = _animation ? _animation->bodyMoved.value(1.) : 1.;
const auto imageFinal = _image.isNull() ? 0. : 1.;
const auto imageShown = _animation
? _animation->imageShown.value(imageFinal)
: imageFinal;
if (progress == 1. && imageShown == imageFinal && _animation) {
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_animation = nullptr;
}
const auto body = [&] {
if (!_animation || !_animation->imageShown.animating()) {
return bodyRect();
}
const auto noImage = bodyRect(false);
const auto withImage = bodyRect(true);
return QRect(
anim::interpolate(noImage.x(), withImage.x(), imageShown),
noImage.y(),
anim::interpolate(noImage.width(), withImage.width(), imageShown),
noImage.height());
}();
const auto text = textRect();
const auto image = imageRect();
const auto width = _widget.width();
const auto noShift = !_animation
|| (_animation->movingTo == RectPart::None);
const auto shiftFull = st::msgReplyBarSkip;
const auto shiftTo = noShift
? 0
: (_animation->movingTo == RectPart::Top)
? anim::interpolate(shiftFull, 0, progress)
: anim::interpolate(-shiftFull, 0, progress);
const auto shiftFrom = noShift
? 0
: (_animation->movingTo == RectPart::Top)
? (shiftTo - shiftFull)
: (shiftTo + shiftFull);
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paintLeftBar(p);
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if (!_animation) {
if (!_image.isNull()) {
p.drawPixmap(image, _image);
}
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} else if (!_animation->imageTo.isNull()
|| (!_animation->imageFrom.isNull()
&& _animation->imageShown.animating())) {
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const auto rect = [&] {
if (!_animation->imageShown.animating()) {
return image;
}
const auto size = anim::interpolate(0, image.width(), imageShown);
return QRect(
image.x(),
image.y() + (image.height() - size) / 2,
size,
size);
}();
if (_animation->bodyMoved.animating()) {
p.setOpacity(1. - progress);
p.drawPixmap(
rect.translated(0, shiftFrom),
_animation->imageFrom);
p.setOpacity(progress);
p.drawPixmap(rect.translated(0, shiftTo), _animation->imageTo);
p.setOpacity(1.);
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} else {
p.drawPixmap(rect, _image);
}
}
if (!_animation || _animation->bodyAnimation == BodyAnimation::None) {
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if (_title.isEmpty()) {
// "Loading..." state.
p.setPen(st::historyComposeAreaFgService);
_text.drawLeftElided(
p,
body.x(),
body.y() + (body.height() - st::normalFont->height) / 2,
body.width(),
width);
} else {
p.setPen(_st.textFg);
p.setTextPalette(_st.textPalette);
_text.drawLeftElided(p, body.x(), text.y(), body.width(), width);
}
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} else if (_animation->bodyAnimation == BodyAnimation::Text) {
p.setOpacity(1. - progress);
p.drawPixmap(
body.x(),
text.y() + shiftFrom,
_animation->bodyOrTextFrom);
p.setOpacity(progress);
p.drawPixmap(body.x(), text.y() + shiftTo, _animation->bodyOrTextTo);
p.setOpacity(1.);
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}
if (!_animation || _animation->bodyAnimation != BodyAnimation::Full) {
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if (_animation && !_animation->titleSame.isNull()) {
const auto factor = style::DevicePixelRatio();
p.drawPixmap(body.x(), body.y(), _animation->titleSame);
p.setOpacity(1. - progress);
p.drawPixmap(
body.x() + (_animation->titleSame.width() / factor),
body.y() + shiftFrom,
_animation->titleFrom);
p.setOpacity(progress);
p.drawPixmap(
body.x() + (_animation->titleSame.width() / factor),
body.y() + shiftTo,
_animation->titleTo);
p.setOpacity(1.);
} else {
p.setPen(_st.titleFg);
_title.drawLeftElided(p, body.x(), body.y(), body.width(), width);
}
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} else {
p.setOpacity(1. - progress);
p.drawPixmap(
body.x(),
body.y() + shiftFrom,
_animation->bodyOrTextFrom);
p.setOpacity(progress);
p.drawPixmap(body.x(), body.y() + shiftTo, _animation->bodyOrTextTo);
p.setOpacity(1.);
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}
}
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auto MessageBar::countBarState(int index) const -> BarState {
Expects(index >= 0 && index < _content.count);
auto result = BarState();
const auto line = st::msgReplyBarSize.width();
const auto height = st::msgReplyBarSize.height();
const auto count = _content.count;
const auto shownCount = std::min(count, 4);
const auto dividers = (shownCount - 1) * line;
const auto size = float64(st::msgReplyBarSize.height() - dividers)
/ shownCount;
const auto fullHeight = count * size + (count - 1) * line;
const auto topByIndex = [&](int index) {
return index * (size + line);
};
result.scroll = (count < 5 || index < 2)
? 0
: (index >= count - 2)
? (fullHeight - height)
: (topByIndex(index) - (height - size) / 2);
result.size = size;
result.skip = line;
result.offset = topByIndex(index);
return result;
}
auto MessageBar::countBarState() const -> BarState {
return countBarState(_content.index);
}
void MessageBar::ensureGradientsCreated(int size) {
if (!_topBarGradient.isNull()) {
return;
}
const auto rows = size * style::DevicePixelRatio() - 2;
auto bottomMask = QImage(
QSize(1, size) * style::DevicePixelRatio(),
QImage::Format_ARGB32_Premultiplied);
const auto step = ((1ULL << 24) - 1) / rows;
const auto limit = step * rows;
auto bits = bottomMask.bits();
const auto perLine = bottomMask.bytesPerLine();
for (auto counter = uint32(0); counter != limit; counter += step) {
const auto value = (counter >> 16);
memset(bits, int(value), perLine);
bits += perLine;
}
memset(bits, 255, perLine * 2);
auto bottom = style::colorizeImage(bottomMask, st::historyPinnedBg);
bottom.setDevicePixelRatio(style::DevicePixelRatio());
auto top = bottom.mirrored();
_bottomBarGradient = Images::PixmapFast(std::move(bottom));
_topBarGradient = Images::PixmapFast(std::move(top));
}
void MessageBar::paintLeftBar(Painter &p) {
const auto state = countBarState();
const auto gradientSize = int(std::ceil(state.size * 2.5));
if (_content.count > 4) {
ensureGradientsCreated(gradientSize);
}
const auto scroll = _animation
? _animation->barScroll.value(state.scroll)
: state.scroll;
const auto offset = _animation
? _animation->barTop.value(state.offset)
: state.offset;
const auto line = st::msgReplyBarSize.width();
const auto height = st::msgReplyBarSize.height();
const auto activeFrom = offset - scroll;
const auto activeTill = activeFrom + state.size;
const auto single = state.size + state.skip;
const auto barSkip = st::msgReplyPadding.top() + st::msgReplyBarPos.y();
const auto fullHeight = barSkip + height + barSkip;
const auto bar = QRect(
st::msgReplyBarSkip + st::msgReplyBarPos.x(),
barSkip,
line,
state.size);
const auto paintFromScroll = std::max(scroll - barSkip, 0.);
const auto paintFrom = int(std::floor(paintFromScroll / single));
const auto paintTillScroll = (scroll + height + barSkip);
const auto paintTill = std::min(
int(std::floor(paintTillScroll / single)) + 1,
_content.count);
p.setPen(Qt::NoPen);
const auto activeBrush = QBrush(st::msgInReplyBarColor);
const auto inactiveBrush = QBrush(QColor(
st::msgInReplyBarColor->c.red(),
st::msgInReplyBarColor->c.green(),
st::msgInReplyBarColor->c.blue(),
st::msgInReplyBarColor->c.alpha() / 3));
const auto radius = line / 2.;
auto hq = PainterHighQualityEnabler(p);
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p.setClipRect(bar.x(), 0, bar.width(), fullHeight);
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for (auto i = paintFrom; i != paintTill; ++i) {
const auto top = i * single - scroll;
const auto bottom = top + state.size;
const auto active = (top == activeFrom);
p.setBrush(active ? activeBrush : inactiveBrush);
p.drawRoundedRect(bar.translated(0, top), radius, radius);
if (active
|| bottom - line <= activeFrom
|| top + line >= activeTill) {
continue;
}
const auto partFrom = std::max(top, activeFrom);
const auto partTill = std::min(bottom, activeTill);
p.setBrush(activeBrush);
p.drawRoundedRect(
QRect(bar.x(), bar.y() + partFrom, line, partTill - partFrom),
radius,
radius);
}
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p.setClipping(false);
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if (_content.count > 4) {
const auto firstScroll = countBarState(2).scroll;
const auto gradientTop = (scroll >= firstScroll)
? 0
: anim::interpolate(-gradientSize, 0, scroll / firstScroll);
const auto lastScroll = countBarState(_content.count - 3).scroll;
const auto largestScroll = countBarState(_content.count - 1).scroll;
const auto gradientBottom = (scroll <= lastScroll)
? fullHeight
: anim::interpolate(
fullHeight,
fullHeight + gradientSize,
(scroll - lastScroll) / (largestScroll - lastScroll));
if (gradientTop > -gradientSize) {
p.drawPixmap(
QRect(bar.x(), gradientTop, bar.width(), gradientSize),
_topBarGradient);
}
if (gradientBottom < fullHeight + gradientSize) {
p.drawPixmap(
QRect(
bar.x(),
gradientBottom - gradientSize,
bar.width(),
gradientSize),
_bottomBarGradient);
}
}
}
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} // namespace Ui