2016-01-12 16:26:00

1 files changed, 117 insertions, 0 deletions

diff --git a/tex/context/base/mkiv/lxml-dir.lua b/tex/context/base/mkiv/lxml-dir.lua
new file mode 100644
index 000000000..48c0ac41e
--- /dev/null
+++ b/tex/context/base/mkiv/lxml-dir.lua
@@ -0,0 +1,117 @@
+if not modules then modules = { } end modules ['lxml-dir'] = {
+    version   = 1.001,
+    comment   = "this module is the basis for the lxml-* ones",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local gsub = string.gsub
+local formatters = string.formatters
+
+-- <?xml version="1.0" standalone="yes"?>
+-- <!-- demo.cdx -->
+-- <directives>
+-- <!--
+--     <directive attribute='id' value="100" setup="cdx:100"/>
+--     <directive attribute='id' value="101" setup="cdx:101"/>
+-- -->
+-- <!--
+--     <directive attribute='cdx' value="colors"   element="cals:table" setup="cdx:cals:table:colors"/>
+--     <directive attribute='cdx' value="vertical" element="cals:table" setup="cdx:cals:table:vertical"/>
+--     <directive attribute='cdx' value="noframe"  element="cals:table" setup="cdx:cals:table:noframe"/>
+-- -->
+-- <directive attribute='cdx' value="*" element="cals:table" setup="cdx:cals:table:*"/>
+-- </directives>
+
+local lxml        = lxml
+local context     = context
+
+local getid       = lxml.getid
+
+local directives  = lxml.directives or { }
+lxml.directives   = directives
+
+local report_lxml = logs.reporter("xml","tex")
+
+local data = {
+    setup  = { },
+    before = { },
+    after  = { }
+}
+
+local function load_setup(filename)
+    local fullname = resolvers.findtexfile(filename) or ""
+    if fullname ~= "" then
+        filename = fullname
+    end
+    local collection = xml.applylpath({ getid(xml.load(filename)) },"directive") -- is { } needed ?
+    if collection then
+        local valid = 0
+        for i=1,#collection do
+            local at = collection[i].at
+            local attribute, value, element = at.attribute or "", at.value or "", at.element or '*'
+            local setup, before, after = at.setup or "", at.before or "", at.after or ""
+            if attribute ~= "" and value ~= "" then
+                local key = formatters["%s::%s::%s"](element,attribute,value)
+                local t = data[key] or { }
+                if setup  ~= "" then t.setup  = setup  end
+                if before ~= "" then t.before = before end
+                if after  ~= "" then t.after  = after  end
+                data[key] = t
+                valid = valid + 1
+            end
+        end
+        report_lxml("%s directives found in %a, valid %s",#collection,filename,valid)
+    else
+        report_lxml("no directives found in %a",filename)
+    end
+end
+
+local function handle_setup(category,root,attribute,element)
+    root = getid(root)
+    if attribute then
+        local value = root.at[attribute]
+        if value then
+            if not element then
+                local ns, tg = root.rn or root.ns, root.tg
+                if ns == "" then
+                    element = tg
+                else
+                    element = ns .. ':' .. tg
+                end
+            end
+            local setup = data[formatters["%s::%s::%s"](element,attribute,value)]
+            if setup then
+                setup = setup[category]
+            end
+            if setup then
+                context.directsetup(setup)
+            else
+                setup = data[formatters["%s::%s::*"](element,attribute)]
+                if setup then
+                    setup = setup[category]
+                end
+                if setup then
+                    setup = gsub(setup,'%*',value)
+                    context.directsetup(setup)
+                end
+            end
+        end
+    end
+end
+
+directives.load   = load_setup
+directives.handle = handle_setup
+
+function directives.setup(root,attribute,element)
+    handle_setup('setup',root,attribute,element)
+end
+
+function directives.before(root,attribute,element)
+    handle_setup('before',root,attribute,element)
+end
+
+function directives.after(root,attribute,element)
+    handle_setup('after',root,attribute,element)
+end