100 lines
2.6 KiB
Lua
100 lines
2.6 KiB
Lua
-- Copyright 2008 Steven Barth <steven@midlink.org>
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-- Copyright 2017 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 util = require "gluon.web.util"
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local fs = require "nixio.fs"
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local tostring, setmetatable, setfenv, pcall, assert = tostring, setmetatable, setfenv, pcall, assert
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module "gluon.web.template"
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local viewdir = util.libpath() .. "/view/"
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local i18ndir = util.libpath() .. "/i18n/"
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function renderer(env)
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local ctx = {}
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local function render_template(name, template, scope)
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scope = scope or {}
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local locals = {
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renderer = ctx,
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translate = ctx.translate,
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translatef = ctx.translatef,
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_translate = ctx._translate,
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include = function(name)
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ctx.render(name, scope)
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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 env[key] or locals[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 occured: " .. 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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function ctx.render(name, scope)
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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)
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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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function ctx.render_string(str, scope)
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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)
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end
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function ctx.setlanguage(lang)
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lang = lang:gsub("_", "-")
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if not lang then return false end
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if lang ~= 'en' and not fs.access(i18ndir .. "gluon-web." .. lang .. ".lmo") then
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return false
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end
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return tparser.load_catalog(lang, i18ndir)
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end
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-- Returns a translated string, or nil if none is found
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function ctx._translate(key)
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return (tparser.translate(key))
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end
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-- Returns a translated string, or the original string if none is found
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function ctx.translate(key)
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return tparser.translate(key) or key
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end
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function ctx.translatef(key, ...)
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local t = ctx.translate(key)
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return t:format(...)
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end
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return ctx
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end
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