[API CHANGE] Synchronize supported Writer document zoom ranges

Desktop / LibreOffice - Stephan Bergmann [redhat.com] - 7 February 2019 08:21 EST

On the one hand, SvxZoomSliderItem/SvxZoomSliderControl as used by SwView's SID_ATTR_ZOOMSLIDER support a range from MINZOOM (20) to MAXZOOM (600) (defined in sw/inc/view.hxx). Setting a zoom value outside that range for one causes the DBG_ASSERT "Looks like the zoom slider item is corrupted" in SvxZoomSliderControl::StateChanged (svx/source/stbctrls/zoomsliderctrl.cxx) to fire, and for another (when setting a too small value) tries to assign a negative value (which wraps around, and gets flagged by Clang's-fsanitize=implicit-signed-integer-truncation) to sal_uInt16 nCurrentZoom at

nCurrentZoom = nCurrentZoom - mxImpl->mnMinZoom;

in SvxZoomSliderControl::Zoom2Offset (svx/source/stbctrls/zoomsliderctrl.cxx).

On the other hand, SwXViewSettings' support of css.text.ViewSettings' ZoomValue property allowed values in the range from 5 to 1000 (cf. SwXViewSettings::_setSingleValue in sw/source/uibase/uno/unomod.cxx), and some JunitTests actually set such values (10, 15) below the MINZOOM value of 20.

The incompatible 5--1000 range was there ever since 7b0b5cdfeed656b279bc32cd929630d5fc25878b "initial import", but looks rather random, so change it to match the 20--600 range instead. (And lets flag this as an [API CHANGE], to be on the safe side.)

One of the JunitTests files that needed to be adapted, qadevOOo/tests/java/mod/_sw/SwAccessibleEndnoteView.java, oddly mentioned a zoom value of 130% in a comment while using the value 15 in the actual code. (And did so ever since the test code's introduction in 26ebdfc472be16f0eb4110aab0335666d2ba5e62 "NEW: initial version".) Changing the code to 130 would cause JunitTest_sw_unoapi_1 to fail in strange ways, with disposed UNO objects, while changing the code (and comment) to 21 appears to work. Go figure.

Change-Id: Id944ffdce501448312e008436e7038bf2aec63ac Reviewed-on: https://gerrit.libreoffice.org/67427

6287a4f0d18d [API CHANGE] Synchronize supported Writer document zoom ranges
qadevOOo/tests/java/mod/_sw/SwAccessibleEndnoteView.java | 12 ++++++------
.../tests/java/mod/_sw/SwAccessibleTextGraphicObject.java | 4 ++--
sw/source/uibase/uno/unomod.cxx | 2 +-
3 files changed, 9 insertions(+), 9 deletions(-)

Upstream: cgit.freedesktop.org

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