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Set a maximum value to zoom level

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The minimal vamue is set to 10%, let's set the max to 1000%. This
avoids crashes when characters are too large.

The code is refactored to be more compact and the tests are more precise.

Fixes bug #12452.
This commit is contained in:
Jean-Marc Lasgouttes 2022-02-08 19:42:17 +01:00
parent 2e07736c17
commit 5259b6ba62
2 changed files with 39 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
src/frontends/qt/GuiView.cpp
View File

@ -643,8 +643,7 @@ GuiView::GuiView(int id)
zoom_ratio_ = settings.value("zoom_ratio", 1.0).toDouble();
// Actual zoom value: default zoom + fractional offset
int zoom = (int)(lyxrc.defaultZoom * zoom_ratio_);
if (zoom < static_cast<int>(zoom_min_))
zoom = zoom_min_;
zoom = min(max(zoom, zoom_min_), zoom_max_);
zoom_slider_->setValue(zoom);
zoom_slider_->setToolTip(qt_("Workarea zoom level. Drag, use Ctrl-+/- or Shift-Mousewheel to adjust."));
@ -982,8 +981,7 @@ bool GuiView::restoreLayout()
zoom_ratio_ = settings.value("zoom_ratio", 1.0).toDouble();
// Actual zoom value: default zoom + fractional offset
int zoom = (int)(lyxrc.defaultZoom * zoom_ratio_);
if (zoom < static_cast<int>(zoom_min_))
zoom = zoom_min_;
zoom = min(max(zoom, zoom_min_), zoom_max_);
setCurrentZoom(zoom);
devel_mode_ = settings.value("devel_mode", devel_mode_).toBool();
settings.beginGroup("views");
@ -2100,6 +2098,30 @@ void GuiView::resetAutosaveTimers()
}
namespace {
double zoomRatio(FuncRequest const & cmd, double const zr)
{
if (cmd.argument().empty()) {
if (cmd.action() == LFUN_BUFFER_ZOOM)
return 1.0;
else if (cmd.action() == LFUN_BUFFER_ZOOM_IN)
return zr + 0.1;
else // cmd.action() == LFUN_BUFFER_ZOOM_OUT
return zr - 0.1;
} else {
if (cmd.action() == LFUN_BUFFER_ZOOM)
return convert<int>(cmd.argument()) / double(lyxrc.defaultZoom);
else if (cmd.action() == LFUN_BUFFER_ZOOM_IN)
return zr + convert<int>(cmd.argument()) / 100.0;
else // cmd.action() == LFUN_BUFFER_ZOOM_OUT
return zr - convert<int>(cmd.argument()) / 100.0;
}
}
}
bool GuiView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
{
bool enable = true;
@ -2479,36 +2501,24 @@ bool GuiView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
break;
case LFUN_BUFFER_ZOOM_OUT:
case LFUN_BUFFER_ZOOM_IN: {
// only diff between these two is that the default for ZOOM_OUT
// is a neg. number
bool const neg_zoom =
convert<int>(cmd.argument()) < 0 ||
(cmd.action() == LFUN_BUFFER_ZOOM_OUT && cmd.argument().empty());
if (lyxrc.currentZoom <= zoom_min_ && neg_zoom) {
case LFUN_BUFFER_ZOOM_IN:
case LFUN_BUFFER_ZOOM: {
int const zoom = (int)(lyxrc.defaultZoom * zoomRatio(cmd, zoom_ratio_));
if (zoom < zoom_min_) {
docstring const msg =
bformat(_("Zoom level cannot be less than %1$d%."), zoom_min_);
flag.message(msg);
enable = false;
} else if (zoom > zoom_max_) {
docstring const msg =
bformat(_("Zoom level cannot be more than %1$d%."), zoom_max_);
flag.message(msg);
enable = false;
} else
enable = doc_buffer;
break;
}
case LFUN_BUFFER_ZOOM: {
bool const less_than_min_zoom =
!cmd.argument().empty() && convert<int>(cmd.argument()) < zoom_min_;
if (lyxrc.currentZoom <= zoom_min_ && less_than_min_zoom) {
docstring const msg =
bformat(_("Zoom level cannot be less than %1$d%."), zoom_min_);
flag.message(msg);
enable = false;
} else if (cmd.argument().empty() && lyxrc.currentZoom == lyxrc.defaultZoom)
enable = false;
else
enable = doc_buffer;
break;
}
case LFUN_BUFFER_MOVE_NEXT:
case LFUN_BUFFER_MOVE_PREVIOUS:
@ -4725,26 +4735,11 @@ void GuiView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
case LFUN_BUFFER_ZOOM_IN:
case LFUN_BUFFER_ZOOM_OUT:
case LFUN_BUFFER_ZOOM: {
if (cmd.argument().empty()) {
if (cmd.action() == LFUN_BUFFER_ZOOM)
zoom_ratio_ = 1.0;
else if (cmd.action() == LFUN_BUFFER_ZOOM_IN)
zoom_ratio_ += 0.1;
else
zoom_ratio_ -= 0.1;
} else {
if (cmd.action() == LFUN_BUFFER_ZOOM)
zoom_ratio_ = convert<int>(cmd.argument()) / double(lyxrc.defaultZoom);
else if (cmd.action() == LFUN_BUFFER_ZOOM_IN)
zoom_ratio_ += convert<int>(cmd.argument()) / 100.0;
else
zoom_ratio_ -= convert<int>(cmd.argument()) / 100.0;
}
zoom_ratio_ = zoomRatio(cmd, zoom_ratio_);
// Actual zoom value: default zoom + fractional extra value
int zoom = (int)(lyxrc.defaultZoom * zoom_ratio_);
if (zoom < static_cast<int>(zoom_min_))
zoom = zoom_min_;
zoom = min(max(zoom, zoom_min_), zoom_max_);
setCurrentZoom(zoom);

2
src/frontends/qt/GuiView.h
View File

@ -520,6 +520,8 @@ private:
double zoom_ratio_ = 1.0;
/// Minimum zoom percentage
static int const zoom_min_ = 10;
/// Maximum zoom percentage
static int const zoom_max_ = 1000;
// movability flag of all toolbars
bool toolbarsMovable_;