Supplemental information for JOSM -- the Java OpenStreetMap Editor

=============================================================================
            I. Install & Launch
=============================================================================

Installation notes
------------------
To run JOSM, you need:

* The JOSM .jar file, e.g., josm-tested.jar or josm-latest.jar
* Java Runtime Environment (JRE) 8, or later.


How to get Java Runtime Environment
-----------------------------------
You need JRE Version 8, or later.

Microsoft Windows and Apple Mac OS X users should visit https://www.java.com
and download the latest Java executable for their system.

Linux users should visit http://www.oracle.com/technetwork/java/index.html
There is a Linux binary installer, which you must execute from a console, or
use the mechanism of your distribution's packaging system.


How to launch
-------------
Microsoft Windows users launch by double-clicking on the .jar file.
If this does not work, open a command shell and type
"java -jar josm-latest.jar"  in the directory that holds the file. (Please
replace josm-latest.jar with the name of your .jar file, if you aren't using
the latest version.)

Under Linux, open a shell, go to the file directory and type
"java -jar josm-latest.jar" to launch. If this does not work, try to set
your JAVA_HOME variable to the java executable location (the root location,
not the bin).

MacOS X users just click on the .jar file icon.

=============================================================================
            II. Development
=============================================================================

How to get the source code
--------------------------
Download it directly from the subversion at
https://josm.openstreetmap.de/svn/trunk. To use the command line subversion
client, type

svn co https://josm.openstreetmap.de/svn/trunk josm


Files & directories
-------------------
This is an overview of the files and directories in the JOSM code repository:
- build.xml                 ant build file (standard way to create a JOSM binary)
- CONTRIBUTION              list of major code contributors
- data/                     data files that will be included in the JOSM jar file
    - fonts/                font files used for map rendering
    - projection/           projection files
      - epsg                list of projection definitions
    - *.lang                translation data
    - *.xsd                 xml schema files for validation of configuration files
    - help-browser.css      CSS file for the help sites (HTML content is downloaded from the website
                            on demand, but displayed inside the programm in a Java web browser component.)
    - validator/            data files used by the JOSM validator feature
      - *.cfg               files designed for the old tagchecker, still used
      - *.mapcss            default validation rules for the new mapcss-based tagchecker
- data_nodist/              data files that are useful for development, but not distributed
    - exif-direction-example.jpg
                            sample image, that contains direction information in the EXIF header
                            (keys: Exif.GPSInfo.GPSImgDirectionRef, Exif.GPSInfo.GPSImgDirection)
    - filterTests.osm       used for unit testing of the filter feature
                            (see test/unit/org/openstreetmap/josm/data/osm/FilterTest.java)
    - Join_Areas_Tests.osm  some examples to test the 'join areas' feature
    - mapcss/               sample map styles and corresponding data files for regression testing
    - projection/           projection files
      - *.gsb               NTv2 grid files for projection support (see CONTRIBUTION)
    - projection-reference-data.csv
                            reference data for projection tests
                            (see test/unit/org/openstreetmap/josm/data/projection/ProjectionRefTest.java)
    - projection-regression-test-data.csv
                            regression data for projection tests
                            (see test/unit/org/openstreetmap/josm/data/projection/ProjectionRegressionTest.java)
- geticons.pl               tool to find all used icons and allows deleting unused icons
                            searches also for images with incompatible svg code
- gpl-2.0.txt, gpl-3.0.txt  full text of the GNU General Public License
- images/                   images distributed with the JOSM binary
    - icons                 images for the Potlatch 2 style
    - presets               images for the main mappaint style and the internal presets
- images_nodist/            images, which are not for distribution, but may be useful later (e.g. high
                            resolution and vector versions)
- josm.jnlp                 Java Web Start launcher file (used on the website for the tested version)
- josm-latest.jnlp          Java Web Start launcher file (used on the website for the latest version)
- LICENSE                   the JOSM license terms
- linux/                    files useful for Linux distributions, including Appdata files, .desktop
                            files, Debian/Ubuntu scripts, man pages, icons, etc.
- macosx/                   files needed to create the MacOS X package
- netbeans/                 preconfigured Netbeans project
- optimize-images           short script to decrease size of PNG images
- patches/                  patches for external libraries used in JOSM (see below)
- README                    this file
- resources/                resource files that will be included in the JOSM jar file
- scripts/                  various scripts used by JOSM developers
- src/                      the source code of the program
- start.html                HTML page to run the applet version of JOSM
- styles/                   map styles included in JOSM
- sytles_nodist/            files needed for map style maintenance
    - potlatch2/README      infos on how to update the Potlatch 2 style from upstream sources
- test/                     automated software tests
    - data/                 resources used for some tests
    - functional/           functional tests (source code)
    - lib/                  libraries needed for (some of) the tests, including JUnit
    - performance/          performance tests (source code)
    - unit/                 unit tests (source code)
- tools/                    libraries and tools that help in the development process
    - animal-sniffer-ant-tasks.jar
                            used to build and check code signatures to ensure plugins binary compatibility 
    - appbundler-1.0ea.jar  used to build Mac OS X package
    - checkstyle/           libs and config files for checkstyle (automatically detects code style
                            problems in source code); can be launched as an ant target in build.xml
    - commons-cli-1.3.1.jar dependency of Groovy Ant task
    - error_prone_ant.jar   used to detect code errors during compilation
    - spotbugs/             libs and config files for spotbugs (automatically detects common bugs and potential
                            problems in source code); can be launched as an ant target in build.xml
    - groovy-all.jar        used for some unit tests and various scripts
    - jacocoant.jar         used to include coverage data into JUnit test reports
    - japicc/               used to generate a compatibility report between optimized jar and normal one
    - javacc.jar            used in the build process to generate some .java files from a javacc source file
                            (src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSParser.jj)
    - proguard.jar          optimize final binary jar - see build.xml (not used in production so far)
    - xmltask.jar           used to edit XML files from Ant for the OSX package
- windows/                  files needed to create the Windows installer

The 'patches' directory
-----------------------
Some libraries that JOSM depends on, are patched for various reasons. The
files in the patches directory can be used to roll back these customizations.
This is useful in order to
 * inspect the changes
 * update to a newer version of the library but keep the modifications

You can use 'quilt' to manage the patches. E.g. the following command applies all of them:

 $ quilt push -a

Of course, it is also possible to apply the patch files manually one by one.

Third party libraries
---------------------
There are some third party libraries which are directly included in the source code tree, in particular:

* jmapviewer: Java component to browse a TMS map
    src/org/openstreetmap/gui (svn external)
    -> http://svn.openstreetmap.org/applications/viewer/jmapviewer/
* Apache commons compress: Support for bzip2 compression when opening files
    src/org/apache/commons/compress/compressors (svn external)
    -> https://github.com/apache/commons-compress
* Apache commons validator: Improved validator routines
    src/org/openstreetmap/josm/data/validation/routines
    -> http://commons.apache.org/proper/commons-validator
* SVG Salamander: Support for SVG image format
    src/com/kitfox/svg
    -> https://github.com/blackears/svgSalamander
* Metadata Extractor: Read EXIF Metadata of photos
    src/com/drew
    -> https://github.com/drewnoakes/metadata-extractor
* Signpost: OAuth library
    src/oauth, src/com/google
    -> https://github.com/mttkay/signpost
* GNU getopt Java port: Command line argument processing library
    src/gnu/getopt
    -> https://github.com/arenn/java-getopt
* MultiSplitPane: Small lib for GUI layout management
    src/org/openstreetmap/josm/gui/MultiSplitLayout.java, MultiSplitPane.java
    -> https://github.com/floscher/multi-split
    -> https://community.oracle.com/docs/DOC-983539
* swinghelper: Class CheckThreadViolationRepaintManager to find classpath violations
    src/org/jdesktop/swinghelper/debug/CheckThreadViolationRepaintManager.java
    -> https://github.com/floscher/swinghelper