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From 0.4.6, uim supports plugin system which loads library and scheme
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definition. uim's plugin consist of both scheme and library.
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___________ (load-plugin "foo")
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| | ------------------+---> libuim-foo.so
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|___________| +---> foo.scm
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When called (load-plugin "foo") from libuim scheme engine, libuim-foo.so
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is loaded and call 'plugin_instance_init' in libuim-foo.so first. After
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loading libuim-foo.so is succeeded, 'foo.scm' is loaded.
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If you want to install 3rd party plugin, you have to place both the shared
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object and scheme file to ~/.uim.d/plugin/.
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For example, if you want to install "foo", you have to locate both libuim-foo.so
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and foo.scm to ~/.uim.d/plugin. And you have to add to ~/.uim as follows,
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If you want to install 3rd party plugin, you have to place the shared object
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to ${libdatadir}/plugin/ and place the scheme library to ${datadir}/plugin.
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For example, if you want to install "foo", you have to install libuim-foo.so
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to ${libdatadir}/plugin and foo.scm to ${datadir}/plugin. If you want to enable
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this for all users put it as follows in ${datadir}/loader.scm,
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* For plugin developers
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plugin_instance_init(void): Called when plugin is being loaded. In most case,
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initialize variables and bind scheme symbol and C
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plugin_instance_quit(void): Called when plugin is being unloaded.
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- Plugin's loading scheme:
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dlopen(libuim-foo.so) -> call plugin_instance_init -> call "foo.scm"
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call plugin_instance_quit -> dlclose(libuim-foo.so)