History

Jan Holesovsky d602c433a0 T602 is an obsolete format, don't assume .txt files are T602 Without this, when the user tries to open a 0-bytes .txt file, they are asked for a Save As operation after they hit the Save button. When we remove the 'txt' from the T602 detection, it rather asks if the user wants to use ODT or Plain text (and lose formatting). Change-Id: Ic48fa61064a9ed78c64d56bc8864f0e12528e072 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/123216 Tested-by: Jenkins Reviewed-by: Jan Holesovsky <kendy@collabora.com>		2021-10-12 09:49:56 +02:00
..
inc
qa	drop 'using namespace std' in filter/qa	2021-10-07 14:26:46 +02:00
source	T602 is an obsolete format, don't assume .txt files are T602	2021-10-12 09:49:56 +02:00
uiconfig/ui
AllLangMoTarget_flt.mk
Configuration_filter.mk
CppunitTest_filter_dialogs_test.mk
CppunitTest_filter_msfilter.mk
CppunitTest_filter_priority.mk
CppunitTest_filter_svg.mk
CppunitTest_filter_textfilterdetect.mk
CppunitTest_filter_xslt.mk
CustomTarget_svg.mk
IwyuFilter_filter.yaml
JunitTest_filter_complex.mk
Library_filterconfig.mk
Library_graphicfilter.mk
Library_icg.mk
Library_msfilter.mk
Library_odfflatxml.mk
Library_pdffilter.mk
Library_storagefd.mk
Library_svgfilter.mk
Library_t602filter.mk
Library_textfd.mk
Library_xmlfa.mk
Library_xmlfd.mk
Library_xsltdlg.mk
Library_xsltfilter.mk
Makefile
Module_filter.mk
Package_docbook.mk
Package_xhtml.mk
Package_xslt.mk
README.md
UIConfig_filter.mk

README.md

LibreOffice Filters

Filter registration and some simple filters (also descriptions).

Desperate splitting of code into small shared libraries for historical reasons presumably (OS/2 and Windows 3.x). The libraries produced from the code in each subdirectory of filter/source/graphicfilter are graphic format import or export filters. But they don't have uniform API. Some have either a GraphicImport or GraphicExport entry point, and are loaded and used in a uniform fashion from code in svtools/source/filter/filter.cxx. Others have different API and are loaded from other places. For instance icgm has ImportCGM, and is loaded and used by sd/source/filter/cgm/sdcgmfilter.cxx (!). Svgreader is used for "File -> Open" and then to choose the svg file. For "Insert -> Picture -> From File", see svgio/source/svgreader directory.

Filter Configuration

The filter configuration consists of two parts, the type definition in filter/source/config/fragments/types/ and the actual filter definition in filter/source/config/fragments/filters/.

Each file type e.g. text file should be represented by exactly one type definition. This type can then be referenced by several different filters, e.g. calc text, writer text.