109 lines
2.9 KiB
Lua
109 lines
2.9 KiB
Lua
-- Copyright 2008 Steven Barth <steven@midlink.org>
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-- Copyright 2017-2018 Matthias Schiffer <mschiffer@universe-factory.net>
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-- Licensed to the public under the Apache License 2.0.
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local tparser = require 'gluon.web.template.parser'
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local tostring, ipairs, setmetatable, setfenv = tostring, ipairs, setmetatable, setfenv
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local pcall, assert = pcall, assert
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return function(config, env)
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local i18n = require('gluon.web.i18n')(config)
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local viewdir = config.base_path .. '/view/'
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local ctx = {}
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local language = 'en'
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local catalogs = {}
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function ctx.set_language(langs)
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for _, lang in ipairs(langs) do
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if i18n.supported(lang) then
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language = lang
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catalogs = {}
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return
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end
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end
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end
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function ctx.i18n(pkg)
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local cat = catalogs[pkg] or i18n.load(language, pkg)
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if pkg then catalogs[pkg] = cat end
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return cat
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end
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local function render_template(name, template, scope, pkg)
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scope = scope or {}
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local t = ctx.i18n(pkg)
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local locals = {
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renderer = ctx,
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i18n = ctx.i18n,
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translate = t.translate,
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translatef = t.translatef,
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_translate = t._translate,
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include = function(name)
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ctx.render(name, scope, pkg)
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end,
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}
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setfenv(template, setmetatable({}, {
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__index = function(tbl, key)
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return scope[key] or locals[key] or env[key]
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end
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}))
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-- Now finally render the thing
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local stat, err = pcall(template)
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assert(stat, "Failed to execute template '" .. name .. "'.\n" ..
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"A runtime error occurred: " .. tostring(err or "(nil)"))
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end
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--- Render a certain template.
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-- @param name Template name
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-- @param scope Scope to assign to template (optional)
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-- @param pkg i18n namespace package (optional)
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function ctx.render(name, scope, pkg)
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local sourcefile = viewdir .. name .. ".html"
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local template, _, err = tparser.parse(sourcefile)
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assert(template, "Failed to load template '" .. name .. "'.\n" ..
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"Error while parsing template '" .. sourcefile .. "':\n" ..
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(err or "Unknown syntax error"))
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render_template(name, template, scope, pkg)
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end
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--- Render a template from a string.
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-- @param template Template string
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-- @param scope Scope to assign to template (optional)
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-- @param pkg i18n namespace package (optional)
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function ctx.render_string(str, scope, pkg)
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local template, _, err = tparser.parse_string(str)
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assert(template, "Error while parsing template:\n" ..
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(err or "Unknown syntax error"))
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render_template('(local)', template, scope, pkg)
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end
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--- Render a template, wrapped in the configured layout.
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-- @param name Template name
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-- @param scope Scope to assign to template (optional)
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-- @param pkg i18n namespace package (optional)
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-- @param layout_scope Additional variables to pass to the layout template
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function ctx.render_layout(name, scope, pkg, layout_scope)
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ctx.render(config.layout_template, setmetatable({
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content = name,
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scope = scope,
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pkg = pkg,
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}, {
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__index = layout_scope
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}), config.layout_package)
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end
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return ctx
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end
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