From 85a7fb296d1c1d8c5aa72c52735d85d774684778 Mon Sep 17 00:00:00 2001
From: Robby Findler <robby@racket-lang.org>
Date: Tue, 20 Nov 2007 00:12:24 +0000
Subject: [PATCH] svn: r7775

original commit: b018afc4406ec8ea125877b8af67b3f1e1510f66
---
 collects/help/private/search.ss | 93 +++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 collects/help/private/search.ss

diff --git a/collects/help/private/search.ss b/collects/help/private/search.ss
new file mode 100644
index 00000000..65aaba1b
--- /dev/null
+++ b/collects/help/private/search.ss
@@ -0,0 +1,93 @@
+#lang scheme/base
+
+(require setup/scribble-index
+         scribble/struct
+         scribble/manual-struct
+         scribble/decode
+         scribble/basic
+         scribble/manual
+         (prefix-in scheme: scribble/scheme)
+         browser/external)
+
+(provide generate-search-results)
+
+(define (make-extra-content desc)
+  ;; Use `desc' to provide more details on the link:
+  (append
+   (cond
+     [(method-index-desc? desc)
+      (list " method of "
+            ;; This is bad. We need a more abstract way to take a
+            ;; binding name and tag/source to create a Scheme link.
+            (make-element
+             "schemesymbol"
+             (list (make-link-element
+                    "schemevaluelink"
+                    (list (symbol->string (exported-index-desc-name desc)))
+                    (method-index-desc-class-tag desc)))))]
+     [else null])
+   (cond
+     [(and (exported-index-desc? desc)
+           (not (null? (exported-index-desc-from-libs desc))))
+      (cons ", provided from "
+            (cdr (apply append
+                        (map (lambda (lib)
+                               (list ", "
+                                     (scheme:to-element lib)))
+                             (exported-index-desc-from-libs desc)))))]
+     [else null])))
+
+(define search-results-files
+  (reverse
+   (let loop ([n 10])
+     (cond
+       [(zero? n) '()]
+       [else
+        (cons (build-path (find-system-path 'temp-dir) 
+                          (format "search-results-~a.html" n))
+              (loop (- n 1)))]))))
+
+(define (next-search-results-file)
+  (begin0 (car search-results-files)
+          (set! search-results-files 
+                (append (cdr search-results-files) 
+                        (list (car search-results-files))))))
+
+(define (generate-search-results search-keys)
+  (let ([file (next-search-results-file)]
+        [search-regexps (map regexp-quote search-keys)]
+        [search-key-string
+         (cond
+           [(null? search-keys) ""]
+           [else
+            (apply
+             string-append
+             (car search-keys)
+             (map (λ (x) (format ", or ~a" x))
+                  (cdr search-keys)))])])
+    (let ([x (load-xref)])
+      (xref-render
+       x
+       (decode `(,(title (format "Search results for ~a" search-key-string))
+                 ,(let* ([index (xref-index x)]
+                         [len (length index)])
+                    (apply itemize
+                           (map
+                            (λ (entry)
+                              (apply item
+                                     (make-link-element
+                                      "indexlink"
+                                      (entry-content entry)
+                                      (entry-link-key entry))
+                                     (make-extra-content
+                                      (entry-desc entry))))
+                            (filter
+                             (λ (entry) 
+                               (ormap (λ (str) 
+                                        (ormap 
+                                         (λ (key) (regexp-match key str))
+                                         search-regexps))
+                                      (entry-words entry)))
+                             index))))))
+       file)
+      (send-url (format "file://~a" (path->string file))))))