From ac726e6c49846b920466650fe9f3b57b1eb50e20 Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Mon, 25 May 2009 03:39:47 +0200
Subject: PLT: New help functionality:

  - Using our own help function, which takes care of trying on not yet
    loaded modules.
  - Module children implemented.
---
 scheme/plt/geiser.ss         |  6 +++++-
 scheme/plt/geiser/autodoc.ss |  9 +++++++--
 scheme/plt/geiser/modules.ss | 22 ++++++++++++++++++++--
 3 files changed, 32 insertions(+), 5 deletions(-)

(limited to 'scheme')

diff --git a/scheme/plt/geiser.ss b/scheme/plt/geiser.ss
index 2f9403e..ed3d9d4 100644
--- a/scheme/plt/geiser.ss
+++ b/scheme/plt/geiser.ss
@@ -40,7 +40,9 @@
            geiser:module-completions
            geiser:symbol-location
            geiser:module-location
-           geiser:autodoc)
+           geiser:module-children
+           geiser:autodoc
+           geiser:help)
 
   (compile-enforce-module-constants #f)
   (require geiser/eval
@@ -54,10 +56,12 @@
   (define geiser:load-file load-file)
   (define geiser:compile-file compile-file)
   (define geiser:autodoc autodoc)
+  (define geiser:help get-help)
   (define geiser:completions symbol-completions)
   (define geiser:module-completions module-completions)
   (define geiser:symbol-location symbol-location)
   (define geiser:module-location module-location)
+  (define geiser:module-children module-children)
   (define geiser:macroexpand macroexpand)
 
   (current-prompt-read (compose (make-repl-reader (current-prompt-read))
diff --git a/scheme/plt/geiser/autodoc.ss b/scheme/plt/geiser/autodoc.ss
index f7a0c55..73ed24d 100644
--- a/scheme/plt/geiser/autodoc.ss
+++ b/scheme/plt/geiser/autodoc.ss
@@ -22,9 +22,14 @@
 
 #lang scheme
 
-(provide autodoc update-module-cache)
+(provide autodoc update-module-cache get-help)
 
-(require geiser/utils geiser/modules geiser/locations)
+(require geiser/utils geiser/modules geiser/locations scheme/help)
+
+(define (get-help symbol mod)
+  (with-handlers ((exn? (lambda (e)
+                          (eval `(help ,symbol #:from ,mod)))))
+    (eval `(help ,symbol))))
 
 (define (autodoc form)
   (cond ((null? form) #f)
diff --git a/scheme/plt/geiser/modules.ss b/scheme/plt/geiser/modules.ss
index 1b03d1a..02287e0 100644
--- a/scheme/plt/geiser/modules.ss
+++ b/scheme/plt/geiser/modules.ss
@@ -27,9 +27,10 @@
          namespace->module-path-name
          module-path-name->name
          module-spec->path-name
-         module-list)
+         module-list
+         module-children)
 
-(require srfi/13 scheme/enter)
+(require srfi/13 scheme/enter syntax/modresolve syntax/modcode)
 
 (define (ensure-module-spec spec)
   (cond ((symbol? spec) spec)
@@ -127,5 +128,22 @@
                 string<?)))
   module-cache)
 
+(define (module-children mod)
+  (define (extract-ids ls)
+    (append-map (lambda (idls)
+                  (map car (cdr idls)))
+                ls))
+  (define (classify-ids ids ns)
+    (let loop ((ids ids) (procs '()) (vars '()))
+      (cond ((null? ids) `((procs ,@(reverse procs)) (vars ,@(reverse vars))))
+            ((procedure? (namespace-variable-value (car ids) #t (lambda () #f) ns))
+             (loop (cdr ids) (cons (car ids) procs) vars))
+            (else (loop (cdr ids) procs (cons (car ids) vars))))))
+  (let-values (((reg syn)
+                (module-compiled-exports
+                 (get-module-code (resolve-module-path mod #f)))))
+    (let ((syn (extract-ids syn))
+          (reg (extract-ids reg)))
+      `((syntax ,@syn) ,@(classify-ids reg (module-spec->namespace mod))))))
 
 ;;; modules.ss ends here
-- 
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