0a9da9e43c
I know NOTHING about the intricacies of Undo/Redo.
However, this is my feeble attempt to add some sanity to it.
It should not be the responsibility of the caller
to know when they are allowed to call ClearRedo.
This patch reverts commit 0cd000bb83719982c1fd2265ea040c82af5bf98e
author Daniel Arato (NISZ) on Mon May 10 15:41:28 2021 +0200
tdf#141613 sw: avoid possible crash when undoing header creation
which was not a sufficient hack.
I hope this patch lays a better framework
to handle future similar issues.
vvv NAIVE OPTIMIST ALERT vvv
mbDoing was added with
commit 9cb53122e9e098bc8a6bf53c14b18415e369dd6d
Author: Frank Schoenheit on Fri Oct 22 15:00:39 2010 +0200
undoapi: more I/SfxUndoManager changes
in preparation of new Undo API features
and has been untouched since then AFAICS,
and there was never any mechanism to change mbDoing.
In other words, it has been sitting there doing NOTHING.
So, I am taking it over and using it how I imagine it was intended,
and how it is documented.
Change-Id: I7aa355cc6458ac8ba34ddb9ee73fc850dcbca702
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170793
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
LibreOffice Impress / Draw Application
The core directory for the impress/draw applications.
Think of impress as a hack on top of draw.
sd module contains impress/draw specific code, non-shared UI and part
of ppt and pptx filter, few other filters too.
the slideshow UI lives here as well, the slideshow engine is in
slideshow module though (including the 3D transitions engine
slideshow/source/engine/opengl).
the most used filters are ODF's odp, binary ppt and OOXML's
pptx. their locations are listed below:
-
odpimport and export filters are inxmloffmodule (mostlyxmloff/source/draw) -
pptimport is insd/source/filter/ppt(big shared chunks are also insvx) -
pptexport is insd/source/filter/eppt(big shared chunks are also insvx) -
pptximport is inoox/source/ppt(and uses a lot ofoox/source/drawingmlandoox/source/*) -
pptxexport is insd/source/filter/eppt(mostly inpptx-*source files) and shared part is inoox/source/export
PPTX Export / Import Filters
PPTX export filter is split into 2 parts. Impress related part is in
sd/source/filter/eppt/pptx-* and the other part is in
oox/source/export/ because it contains mostly code related to
DrawingML, which is shared with writer and calc ooxml export.
The export filter was written in 2009 IIRC and was not much extended feature-wise lately.
Presenter Console
The main screen uses a hardware-accelerated
canvas (e.g. cairo canvas), while the entire secondary screen
uses a VCL-canvas that is created in
sd::framework::FullScreenPane::CreateCanvas().
The secondary screen contains 3 Panes which each have
2 XWindows for the border area & the actual content,
and each content Pane is backed by a sd::presenter::PresenterCanvas
that wraps the FullScreenPane's canvas and does clipping.
Future Works
Add custom shapes export (see below). enhance text
output, we don't write text style for indentation levels now, need to
export a:lvl1pPr, a:lvl2pPr, ... elements.
PPTX import was written by Sun/Oracle and then extended in LibreOffice
a lot during bug fixing. It is located in oox/source/ppt and
oox/source/drawingml. The areas with most bugs (at least until today)
were shape placeholders and text style inheritance.