| commit | afa6a774936c34b09b37ab8539193ac529681798 | [log] |
|---|---|---|
| author | Mike Kaganski <mike.kaganski@collabora.com> | Mon Jan 06 10:49:31 2020 +0300 |
| committer | Mike Kaganski <mike.kaganski@collabora.com> | Mon Jan 06 11:29:17 2020 +0100 |
| tree | 98bd8f03d627800dc57ac436907119febe3e5d12 | |
| parent | 499bfe4584ea3334cda1501daa9aa3026edd45be [diff] |
Don't crash on exiting print preview with Notebookbar Crash caused by this sequence (tested in Writer): 1. Closing print preview, frame is attached to controller; 2. This calls SfxNotebookBar::StateMethod 3. There notebookbar's listener is added to list of the controller's context change event listeners 4. Then in SwPagePreview::~SwPagePreview, notebookbar's listener is added to that list again 5. ContextChangeEventMultiplexer::addContextChangeEventListener detects second addition, and throws an unhandled exception. I don't know why starting listening is needed in SwPagePreview dtor; unfortunately commit d05b7b32d9ecb6fcb4a268eb68cdcee09bafa6dd doesn't say much about context and reasons. ControlListener is renamed to ControlListenerForCurrentController to emphasize that it operates on the current controller of notebookbar's frame; and its bListen parameter meaning was reverted: previously its "true" value awkwardly meant "stop listening". All direct operations with listener of notebookbar are replaced with calls to notebookbar's methods. In ContextChangeEventMultiplexer::addContextChangeEventListener, uno::UNO_QUERY_THROW was replaced with uno::UNO_QUERY, because not only chart controller may appear here, and it's not an error: e.g. SfxBaseController doesn't implement lang::XServiceInfo. Regression after commit d05b7b32d9ecb6fcb4a268eb68cdcee09bafa6dd. Change-Id: Ief1aed188d8f02a6cfe3ea25f4d082dfdf449f32 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86257 Tested-by: Jenkins Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
LibreOffice is an integrated office suite based on copyleft licenses and compatible with most document formats and standards. Libreoffice is backed by The Document Foundation, which represents a large independent community of enterprises, developers and other volunteers moved by the common goal of bringing to the market the best software for personal productivity. LibreOffice is open source, and free to download, use and distribute.
A quick overview of the LibreOffice code structure.
You can develop for LibreOffice in one of two ways, one recommended and one much less so. First the somewhat less recommended way: it is possible to use the SDK to develop an extension, for which you can read the API docs here and here. This re-uses the (extremely generic) UNO APIs that are also used by macro scripting in StarBasic.
The best way to add a generally useful feature to LibreOffice is to work on the code base however. Overall this way makes it easier to compile and build your code, it avoids any arbitrary limitations of our scripting APIs, and in general is far more simple and intuitive - if you are a reasonably able C++ programmer.
These are the current minimal operating system and compiler versions to run and compile LibreOffice, also used by the TDF builds:
If you want to use Clang with the LibreOffice compiler plugins, the minimal version of Clang is 5.0.2. Since Xcode doesn't provide the compiler plugin headers, you have to compile your own Clang to use them on macOS.
You can find the TDF configure switches in the distro-configs/ directory.
To setup your initial build environment on Windows and macOS, we provide the LibreOffice Development Environment (LODE) scripts.
For more information see the build instructions for your platform in the TDF wiki.
Each module should have a README file inside it which has some degree of documentation for that module; patches are most welcome to improve those. We have those turned into a web page here:
However, there are two hundred modules, many of them of only peripheral interest for a specialist audience. So - where is the good stuff, the code that is most useful. Here is a quick overview of the most important ones:
| Module | Description |
|---|---|
| sal/ | this provides a simple System Abstraction Layer |
| tools/ | this provides basic internal types: 'Rectangle', 'Color' etc. |
| vcl/ | this is the widget toolkit library and one rendering abstraction |
| framework | UNO framework, responsible for building toolbars, menus, status bars, and the chrome around the document using widgets from VCL, and XML descriptions from /uiconfig/ files |
| sfx2/ | legacy core framework used by Writer/Calc/Draw: document model / load/save / signals for actions etc. |
| svx/ | drawing model related helper code, including much of Draw/Impress |
Then applications
| Module | Description |
|---|---|
| desktop/ | this is where the 'main' for the application lives, init / bootstrap. the name dates back to an ancient StarOffice that also drew a desktop |
| sw/ | Writer |
| sc/ | Calc |
| sd/ | Draw / Impress |
There are several other libraries that are helpful from a graphical perspective:
| Module | Description |
|---|---|
| basegfx/ | algorithms and data-types for graphics as used in the canvas |
| canvas/ | new (UNO) canvas rendering model with various backends |
| cppcanvas/ | C++ helper classes for using the UNO canvas |
| drawinglayer/ | View code to render drawable objects and break them down into primitives we can render more easily. |
Use the "..." form if and only if the included file is found next to the including file. Otherwise, use the <...> form. (For further details, see the mail Re: C[++]: Normalizing include syntax ("" vs <>).)
The UNO API include files should consistently use double quotes, for the benefit of external users of this API.
loplugin:includeform (compilerplugins/clang/includeform.cxx) enforces these rules.
Beyond this, you can read the README files, send us patches, ask on the mailing list libreoffice@lists.freedesktop.org (no subscription required) or poke people on IRC #libreoffice-dev on irc.freenode.net - we're a friendly and generally helpful mob. We know the code can be hard to get into at first, and so there are no silly questions.