Update the pret-trans to current context beta.

diff --git a/pret-trans.lua b/pret-trans.lua
index 9c6847e9bf68e5a9fead39032f93f8d1003b8a14..7f32afded167f7f07fe3f1680c7b5b313a3d78c9 100644 (file)
--- a/pret-trans.lua
+++ b/pret-trans.lua
@@ -9,9 +9,7 @@
 
 local utf = unicode.utf8
 
-if not buffers                 then buffers                 = { } end
-if not buffers.visualizers     then buffers.visualizers     = { } end
-if not buffers.visualizers.trans then buffers.visualizers.trans = { } end
+vis = buffers.newvisualizer("trans")
 
 local commands = {}
 -- A command to create a horizontal rule.
@@ -42,50 +40,49 @@ end
 local function blanks(n)
     print("Inserting " .. n .. " blanks")
     for i = 1,n do
-        buffers.visualizers.default.empty_line()
+        buffers.visualizers.handlers.default.empty_line()
     end
 end
 
 -- Prettyprint the given lines using the given pretty printer
 local function prettyprint(ppr, lines)
     -- Change the current visualizer
-    oldvisualizer = buffers.currentvisualizer
-    buffers.currentvisualizer = 'lam'
+    buffers.setvisualizer('lam')
 
     -- Output the lines
-    buffers.hooks.begin_of_buffer('buffer', 'pret-trans-internal')
+    buffers.hooks.begin_of_display()
     line = 0
     for i = 1,#lines do
         _, line = buffers.typeline(lines[i], i, #lines, line)
     end
-    buffers.hooks.end_of_buffer('buffer', 'pret-trans-internal')
+    buffers.hooks.end_of_display()
 
     -- Change the visualizer back
-    buffers.currentvisualizer = oldvisualizer
+    buffers.setvisualizer('trans')
 end
 
 -- Capture all lines, without generating any output
-function buffers.visualizers.trans.begin_of_buffer(type, name)
+function vis.begin_of_display()
     lines = {}
 end
-function buffers.visualizers.trans.begin_of_line(n)
+function vis.begin_of_line(n)
     -- Don't generate output here
 end
-function buffers.visualizers.trans.flush_line(str, nested)
+function vis.flush_line(str, nested)
     table.insert(lines, str)
     -- Don't generate output here
 end
-function buffers.visualizers.trans.end_of_line(n)
+function vis.end_of_line(n)
     -- Don't generate output here
 end
-function buffers.visualizers.empty_line()
+function vis.empty_line()
     table.insert(lines, '')
     -- Don't generate output here
 end
 
 -- We do the actual work here. Process all the lines in the buffer and
 -- generate output for them.
-function buffers.visualizers.trans.end_of_buffer()
+function vis.end_of_display()
     -- Find the horizontal rule, and see how long it is.
     len = nil
     for i = 1,#lines do
@@ -154,7 +151,7 @@ function buffers.visualizers.trans.end_of_buffer()
     -- Print the conditions
     for i = 1,#rights do
         tex.sprint(rights[i])
-        buffers.visualizers.default.end_of_line()
+        buffers.visualizers.handlers.default.end_of_line()
     end
 
     -- Fill up the remaining space with blanks