1 * A quick overview of the LibreOffice code structure.
5 You can develop for LibreOffice in one of two ways, one
6 recommended and one much less so. First the somewhat less recommended
7 way: it is possible to use the SDK, for which you can read the API
8 docs here http://api.libreoffice.org/. This re-uses the (extremely
9 generic) APIs we provide for macro scripting in StarBasic.
11 The best way to add a generally useful feature to LibreOffice
12 is to work on the code base however. Overall this way makes it easier
13 to compile and build your code, it avoids any arbitrary limitations of
14 our scripting APIs, and in general is far more simple and intuitive -
15 if you are a reasonably able C++ programmer.
18 ** The important bits of code
20 Each module should have a README file inside it which has some
21 degree of documentation for that module; patches are most welcome to
22 improve those. We have those turned into a web-page here:
24 http://docs.libreoffice.org/
26 However, there are two hundred modules, many of them of only
27 peripheral interest for a specialist audience. So - where is the
28 good-stuff, the code that is most useful. Here is a quick overview of
29 the most important ones:
31 sal/ - this provides a simple System Abstraction Layer
32 tools/ - this provides basic internal types: 'Rectangle', 'Color' etc.
33 vcl/ - this is the widget toolkit library and one rendering abstraction
34 svx/ - graphics related helper code, including much of 'draw' / 'impress'
35 sfx2/ - core framework: document model / load/save / signals for actions etc.
36 framework - UNO wrappers around the core framework, responsible for building
37 toolbars, menus, status bars, and the chrome around the document
38 using widgets from VCL, and XML descriptions from */uiconfig/ files
42 desktop/ - this is where the 'main' for the application lives, init / bootstrap
43 the name dates back to an ancient StarOffice that also drew a desktop
48 There are several other libraries that are helpful from a
49 graphical perspective:
51 basebmp/ - enables a VCL compatible rendering API to render to bitmaps,
52 as used for LibreOffice on-line, Android, iOS etc.
53 basegfx/ - algorithms and data-types for graphics as used in the canvas
54 canvas/ - new (UNO) canvas rendering model with various backends
55 cppcanvas/ - C++ helper classes for using the UNO canvas
56 drawinglayer/ - code to render and manage document drawing shapes and break
57 them down into primitives we can render more easily.
61 Beyond this, you can read the README files, send us patches, ask
62 on the mailing list libreoffice@lists.freedesktop.org (no subscription
63 required) or poke people on IRC #libreoffice-dev on irc.freenode.net -
64 we're a friendly and generally helpful mob. We know the code can be
65 hard to get into at first, and so there are no silly questions.