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[[PageOutline(2-5, Table of Contents, floated)]] | |
This document describes new features and incompatibilities to LuCI 0.9.x. | |
It is targeted at module authors developing external addons to LuCI. | |
# I18N Changes | |
## API | |
The call conventions for the i18n api changed, there is no dedicated translation | |
key anymore and the english text is used for lookup instead. This was done to | |
ease the maintenance of language files. | |
Code that uses _translate()'' or ''i18n()_ must be changed as follows: | |
-- old style: | |
translate("some_text", "Some Text") | |
translatef("some_format_text", "Some formatted Text: %d", 123) | |
-- new style: | |
translate("Some Text") | |
translatef("Some formatted Text: %d", 123) | |
Likewise for templates: | |
<!-- old style: --> | |
<%:some_text Some Text%> | |
<!-- new style: --> | |
<%:Some Text%> | |
If code must support both LuCI 0.9.x and 0.10.x versions, it is suggested to write the calls as follows: | |
translate("Some Text", "Some Text") | |
An alternative is wrapping translate() calls into a helper function: | |
function tr(key, alt) | |
return translate(key) or translate(alt) or alt | |
end | |
... which is used as follows: | |
tr("some_key", "Some Text") | |
## Translation File Format | |
Translation catalogs are now maintained in *.po format files. During build those get translated | |
into [*.lmo archives](http://luci.subsignal.org/trac/wiki/Documentation/LMO). | |
LuCI ships a [utility script](http://luci.subsignal.org/trac/browser/luci/branches/luci-0.10/build/i18n-lua2po.pl) | |
in the build/ directory to convert old Lua translation files to the *.po format. The generated *.po files should | |
be placed in the appropriate subdirectories within the top po/ file in the LuCI source tree. | |
### Components built within the LuCI tree | |
If components using translations are built along with the LuCI tree, the newly added *.po file are automatically | |
compiled into *.lmo archives during the build process. In order to bundle the appropriate *.lmo files into the | |
corresponding *.ipk packages, component Makefiles must include a "PO" variable specifying the files to include. | |
Given a module _applications/example/'' which uses ''po/en/example.po'' and ''po/en/example-extra.po_, | |
the _applications/example/Makefile_ must be changed as follows: | |
PO = example example-extra | |
include ../../build/config.mk | |
include ../../build/module.mk | |
### Standalone components | |
Authors who externally package LuCI components must prepare required *.lmo archives themselves. | |
To convert existing Lua based message catalogs to the *.po format, the build/i18n-lua2po.pl helper script can be used. | |
In order to convert *.po files into *.lmo files, the standalone "po2lmo" utility must be compiled as follows: | |
$ svn co http://svn.luci.subsignal.org/luci/branches/luci-0.10/libs/lmo | |
$ cd lmo/ | |
$ make | |
$ ./src/po2lmo translations.po translations.lmo | |
Note that at the time of writing, the utility program needs Lua headers installed on the system in order to compile properly. | |
# CBI | |
## Datatypes | |
The server side UVL validation has been dropped to reduce space requirements on the target. | |
Instead it is possible to define datatypes for CBI widgets now: | |
opt = section:option(Value, "optname", "Title Text") | |
opt.datatype = "ip4addr" | |
User provided data is validated once on the frontend via JavaScript and on the server side prior to saving it. | |
A list of possible datatypes can be found in the [luci.cbi.datatypes](http://luci.subsignal.org/trac/browser/luci/branches/luci-0.10/libs/web/luasrc/cbi/datatypes.lua#L26) class. | |
## Validation | |
Server-sided validator function can now return custom error messages to provide better feedback on invalid input. | |
opt = section:option(Value, "optname", "Title Text") | |
function opt.validate(self, value, section) | |
if input_is_valid(value) then | |
return value | |
else | |
return nil, "The value is invalid because ..." | |
end | |
end | |
## Tabs | |
It is now possible to break up CBI sections into multiple tabs to better organize longer forms. | |
The TypedSection and NamedSection classes gained two new functions to define tabs, _tab()'' and ''taboption()_. | |
sct = map:section(TypedSection, "name", "type", "Title Text") | |
sct:tab("general", "General Tab Title", "General Tab Description") | |
sct:tab("advanced", "Advanced Tab Title", "Advanced Tab Description") | |
opt = sct:taboption("general", Value, "optname", "Title Text") | |
... | |
The _tab()_ function is declares a new tab and takes up to three arguments: | |
* Internal name of the tab, must be unique within the section | |
* Title text of the tab | |
* Optional description text for the tab | |
The _taboption()'' function wraps ''option()_ and assigns the option object to the given tab. | |
It takes up to five arguments: | |
* Name of the tab to assign the option to | |
* Option type, e.g. Value or DynamicList | |
* Option name | |
* Title text of the option | |
* Optional description text of the option | |
If tabs are used within a particular section, the _option()_ function must not be used, | |
doing so results in undefined behaviour. | |
## Hooks | |
The CBI gained support for _hooks_ which can be used to trigger additional actions during the | |
life-cycle of a map: | |
map = Map("config", "Title Text") | |
function map.on_commit(self) | |
-- do something if the UCI configuration got committed | |
end | |
The following hooks are defined: | |
|| on_cancel || The user pressed cancel within a multi-step Delegator or a SimpleForm instance || | |
|| on_init || The CBI is about to render the Map object || | |
|| on_parse || The CBI is about to read received HTTP form values || | |
|| on_save, on_before_save || The CBI is about to save modified UCI configuration files || | |
|| on_after_save || Modified UCI configuration files just got saved | |
|| on_before_commit || The CBI is about to commit the changes || | |
|| on_commit, on_after_commit, on_before_apply || Modified configurations got committed and the CBI is about to restart associated services || | |
|| on_apply, on_after_apply || All changes where completely applied (only works on Map instances with the apply_on_parse attribute set) || | |
## Sortable Tables | |
TypedSection instances which use the "cbi/tblsection" template may now use a new attribute _sortable_ to allow the user to reorder table rows. | |
sct = map:section(TypedSection, "name", "type", "Title Text") | |
sct.template = "cbi/tblsection" | |
sct.sortable = true | |
... | |
# JavaScript | |
The LuCI 0.10 branch introduced a new JavaScript file _xhr.js_ which provides support routines for XMLHttpRequest operations. | |
Each theme must include this file in the <head> area of the document for forms to work correctly. | |
It should be included like this: | |
<script type="text/javascript" src="<%=resource%>/xhr.js"></script> | |