[fontloader] reorganize under the new import scheme

For better orientation, the fontloader tree now contains two
subdirectories into which files have been reorganized:

The two files required at runtime for the fontloader and luaotfload-tool
are:

      × ``fontloader-basics-gen.lua``
      × ``fontloader-fontloader.lua``

They are now kept in the ``src/fontloader/runtime/`` subdirectory.

All other files from upstream are now located in
``src/fontloader/misc``. This includes a number of files that have not
yet been part of Luaotfload. Currently, the *misc* set of files is not
packaged along with Luaotfload. This may change in the future when there
is an option to switch the merged fontloader for its constituent files,
or even for upstream.

1 files changed, 106 insertions, 0 deletions

diff --git a/src/fontloader/misc/fontloader-fonts-syn.lua b/src/fontloader/misc/fontloader-fonts-syn.lua
new file mode 100644
index 0000000..f03d558
--- /dev/null
+++ b/src/fontloader/misc/fontloader-fonts-syn.lua
@@ -0,0 +1,106 @@
+if not modules then modules = { } end modules ['luatex-fonts-syn'] = {
+    version   = 1.001,
+    comment   = "companion to luatex-*.tex",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+if context then
+    texio.write_nl("fatal error: this module is not for context")
+    os.exit()
+end
+
+-- Generic font names support.
+--
+-- Watch out, the version number is the same as the one used in
+-- the mtx-fonts.lua function scripts.fonts.names as we use a
+-- simplified font database in the plain solution and by using
+-- a different number we're less dependent on context.
+--
+-- mtxrun --script font --reload --simple
+--
+-- The format of the file is as follows:
+--
+-- return {
+--     ["version"]       = 1.001,
+--     ["cache_version"] = 1.001,
+--     ["mappings"]      = {
+--         ["somettcfontone"] = { "Some TTC Font One", "SomeFontA.ttc", 1 },
+--         ["somettcfonttwo"] = { "Some TTC Font Two", "SomeFontA.ttc", 2 },
+--         ["somettffont"]    = { "Some TTF Font",     "SomeFontB.ttf"    },
+--         ["someotffont"]    = { "Some OTF Font",     "SomeFontC.otf"    },
+--     },
+-- }
+
+local fonts = fonts
+fonts.names = fonts.names or { }
+
+fonts.names.version    = 1.001 -- not the same as in context but matches mtx-fonts --simple
+fonts.names.basename   = "luatex-fonts-names"
+fonts.names.new_to_old = { }
+fonts.names.old_to_new = { }
+fonts.names.cache      = containers.define("fonts","data",fonts.names.version,true)
+
+local data, loaded = nil, false
+
+local fileformats = { "lua", "tex", "other text files" }
+
+function fonts.names.reportmissingbase()
+    texio.write("<missing font database, run: mtxrun --script fonts --reload --simple>")
+    fonts.names.reportmissingbase = nil
+end
+
+function fonts.names.reportmissingname()
+    texio.write("<unknown font in database, run: mtxrun --script fonts --reload --simple>")
+    fonts.names.reportmissingname = nil
+end
+
+function fonts.names.resolve(name,sub)
+    if not loaded then
+        local basename = fonts.names.basename
+        if basename and basename ~= "" then
+            data = containers.read(fonts.names.cache,basename)
+            if not data then
+                basename = file.addsuffix(basename,"lua")
+                for i=1,#fileformats do
+                    local format = fileformats[i]
+                    local foundname = resolvers.findfile(basename,format) or ""
+                    if foundname ~= "" then
+                        data = dofile(foundname)
+                        texio.write("<font database loaded: ",foundname,">")
+                        break
+                    end
+                end
+            end
+        end
+        loaded = true
+    end
+    if type(data) == "table" and data.version == fonts.names.version then
+        local condensed = string.gsub(string.lower(name),"[^%a%d]","")
+        local found = data.mappings and data.mappings[condensed]
+        if found then
+            local fontname, filename, subfont = found[1], found[2], found[3]
+            if subfont then
+                return filename, fontname
+            else
+                return filename, false
+            end
+        elseif fonts.names.reportmissingname then
+            fonts.names.reportmissingname()
+            return name, false -- fallback to filename
+        end
+    elseif fonts.names.reportmissingbase then
+        fonts.names.reportmissingbase()
+    end
+end
+
+fonts.names.resolvespec = fonts.names.resolve -- only supported in mkiv
+
+function fonts.names.getfilename(askedname,suffix)  -- only supported in mkiv
+    return ""
+end
+
+function fonts.names.ignoredfile(filename) -- only supported in mkiv
+    return false -- will be overloaded
+end