Remove the 'links-in' feature

doc/handbook/changes.facts

@@ -24,7 +24,7 @@ ARTICLE: "changes" "Changes in the latest release"
 }
 { $subtopic "Help system"
     { $list
-        { "Help cross-referencing implemented - the " { $link links-in. } " and " { $snippet "links-out." } " words are analogous to " { $link usage. } " and " { $snippet "uses." } }
+        { "Help cross-referencing implemented - the " { $snippet "links-in." } " and " { $snippet "links-out." } " words are analogous to " { $link usage. } " and " { $snippet "uses." } }
         { "New documentation covers development tools and C library interface" }
     }
 }

doc/handbook/help.facts

@@ -12,9 +12,7 @@ ARTICLE: "browsing-help" "Browsing documentation"
 "Help topics are identified by article name strings, or words. You can request a specific help topic:"
 { $subsection help }
 "You can also view a word's documentation and definition at once:"
-{ $subsection see-help }
-"You can request a list of topics linking to a specific topic:"
-{ $subsection links-in. } ;
+{ $subsection see-help } ;
 
 ARTICLE: "searching-help" "Searching documentation"
 "The help system maintains a full-text term index. The easiest way to search the help is from the help browser tool in the UI, however you can also search in the listener."
@@ -92,5 +90,4 @@ ARTICLE: "markup-utils" "Markup element utilities"
 "Utility words to assist in defining new elements:"
 { $subsection simple-element }
 { $subsection ($span) }
-{ $subsection ($block) }
-{ $subsection ?terpri } ;
+{ $subsection ($block) } ;

library/bootstrap/boot-stage2.factor

@@ -9,7 +9,6 @@ parser sequences sequences-internals words ;
 [
     "Cross-referencing..." print flush
     H{ } clone crossref set-global xref-words
-    H{ } clone link-graph set-global
     H{ } clone parent-graph set-global xref-articles
 
     "compile" get [

library/bootstrap/image.factor

@@ -291,7 +291,7 @@ M: hashtable ' ( hashtable -- pointer )
     [
         {
             vocabularies typemap builtins c-types crossref
-            articles link-graph parent-graph
+            articles parent-graph
         } [ dup get swap bootstrap-word set ] each
     ] make-hash '
     global-offset fixup ;

library/bootstrap/primitives.factor

@@ -21,7 +21,6 @@ H{ } clone vocabularies set
 vocabularies get [ "syntax" set ] bind
 
 H{ } clone articles set
-link-graph off
 parent-graph off
 crossref off
 

library/help/crossref.factor

@@ -28,16 +28,6 @@ M: array elements*
         ] each-with
     ] make-hash hash-keys ;
 
-SYMBOL: link-graph
-
-: links-out ( article -- seq )
-    article-content { $link $see-also } collect-elements ;
-
-: ?link dup link? [ link-name ] when ;
-
-: links-in ( article -- seq )
-    ?link link-graph get in-edges ;
-
 SYMBOL: parent-graph
 
 DEFER: $subsection
@@ -45,10 +35,8 @@ DEFER: $subsection
 : children ( article -- seq )
     article-content { $subsection } collect-elements ;
 
-: ?link dup link? [ link-name ] when ;
-
 : parents ( article -- seq )
-    ?link parent-graph get in-edges ;
+    dup link? [ link-name ] when parent-graph get in-edges ;
 
 : (where) ( article -- )
     dup , parents [ word? not ] subset dup empty?
@@ -69,18 +57,10 @@ DEFER: $subsection
     ] if ;
 
 : xref-article ( article -- )
-    dup
-    [ links-out ] link-graph get add-vertex
     [ children ] parent-graph get add-vertex ;
 
 : unxref-article ( article -- )
-    dup [ links-out ] link-graph get remove-vertex
     [ children ] parent-graph get remove-vertex ;
 
 : xref-articles ( -- )
-    all-articles dup
-    [ links-out ] link-graph get build-graph
-    [ children ] parent-graph get build-graph ;
-
-: links-in. ( article -- )
-    links-in [ links-in. ] help-outliner ;
+    all-articles [ children ] parent-graph get build-graph ;

library/help/crossref.facts

@@ -11,19 +11,7 @@ HELP: elements "( elt-type element -- seq )"
 HELP: collect-elements "( element seq -- )"
 { $values { "element" "a markup element" } { "seq" "a sequence of words" } { "elements" "a new sequence" } }
 { $description "Collects the arguments of all sub-elements of " { $snippet "element" } " whose markup element type occurs in " { $snippet "seq" } "." }
-{ $notes "Used to implement " { $link links-out } " and " { $link children } "." } ;
-
-HELP: link-graph f
-{ $description "Variable. A graph whose vertices are help articles and edges are links. See " { $link "graphs" } "." }
-{ $see-also links-out links-in xref-articles } ;
-
-HELP: links-out "( topic -- seq )"
-{ $values { "topic" "an article name or a word" } { "seq" "a new sequence" } }
-{ $description "Outputs a sequence of all help articles and words linked to from " { $snippet "article" } "." } ;
-
-HELP: links-in "( topic -- seq )"
-{ $values { "topic" "an article name or a word" } { "seq" "a new sequence" } }
-{ $description "Outputs a sequence of all help articles and words which link to " { $snippet "article" } "." } ;
+{ $notes "Used to implement " { $link children } "." } ;
 
 HELP: parent-graph f
 { $description "Variable. A graph whose vertices are help articles and edges are subsections. See " { $link "graphs" } "." }
@@ -56,7 +44,3 @@ $low-level-note ;
 
 HELP: xref-articles "( -- )"
 { $description "Update the " { $link link-graph } " and " { $link parent-graph } " graphs. Usually this is done automatically." } ;
-
-HELP: links-in. "( topic -- )"
-{ $values { "topic" "an article name or a word" } }
-{ $description "Prints an outliner listing all help articles linking to " { $snippet "article" } "." } ;

library/help/help.facts

@@ -1,7 +1,7 @@
 IN: help
 USING: io prettyprint ;
 
-HELP: print-title "( topic -- )"
+HELP: $title "( topic -- )"
 { $values { "topic" "a help article name or a word" } }
 { $description "Prints a help article's title, or a word's " { $link synopsis } ", depending on the type of " { $snippet "topic" } "." } ;
 

library/help/markup.facts

@@ -8,9 +8,6 @@ HELP: ($span) "( content style -- )"
 { $values { "content" "a markup element" } { "style" "a hashtable" } }
 { $description "Prints an inline markup element." } ;
 
-HELP: ?terpri "( -- )"
-{ $description "Prints a newline if the last element which was output is not a block." } ;
-
 HELP: ($block) "( quot -- )"
 { $values { "quot" "a quotation" } }
 { $description "Prints a block markup element with newlines before and after." } ;

library/help/topics.facts

@@ -24,6 +24,3 @@ HELP: add-article "( name title element -- )"
 { $values { "name" "a string" } { "title" "a string" } { "element" "a markup element" } }
 { $description "Adds a help article to the " { $link articles } " hashtable." }
 { $notes "This word is used to implement " { $link POSTPONE: ARTICLE: } "." } ;
-
-HELP: last-block f
-{ $description "Variable. Set by " { $link print-element } " if the last element output was a block element, thus if the next element is a block element no newline needs to be output." } ;

library/syntax/parse-syntax.facts

@@ -226,7 +226,7 @@ $terpri
 { $see-also define-tuple } ;
 
 HELP: C: "class definition... ;"
-{ $values { "class" "a class word" } { "generic" "a generic word" } { "definition" "a constructor definition" } }
+{ $values { "class" "a class word" } { "definition" "a constructor definition" } }
 { $description "Define a constructor word for a tuple class. The constructor definition receives a new instance of the class on the stack, with all slots initially set to " { $link f } "."
 $terpri
 "Constructors are named after the tuple class surrounded in angle brackets: " { $snippet "<" } " and " { $snippet ">" } "."  }

library/ui/tools/browser.factor

@@ -54,7 +54,6 @@ DEFER: show-vocab
         { "Definition" [ see ] }
         { "Documentation" [ help ] }
         { "Calls in" [ usage. ] }
-        { "Links in" [ links-in. ] }
         { "Properties" [ word-props describe ] }
     } <pages> ;
 

library/ui/tools/help.factor

@@ -30,12 +30,14 @@ C: help-sidebar ( -- gadget )
         { [ <help-search> ] set-help-sidebar-search 1/2 }
     } { 0 1 0 } make-track* ;
 
-TUPLE: help-gadget showing sidebar tabs ;
+TUPLE: help-gadget showing sidebar scroller ;
+
+: help-gadget-pane help-gadget-scroller scroller-gadget ;
 
 C: help-gadget ( -- gadget )
     {
         { [ <help-sidebar> ] set-help-gadget-sidebar 1/4 }
-        { [ <tabs> ] set-help-gadget-tabs 3/4 }
+        { [ <pane> <scroller> ] set-help-gadget-scroller 3/4 }
     } { 1 0 0 } make-track* ;
 
 M: help-gadget gadget-title
@@ -50,11 +52,10 @@ M: help-gadget focusable-child*
     [ over history-seq push-new update-history ] [ 2drop ] if ;
 
 : show-help ( link help -- )
-    dup add-history [ set-help-gadget-showing ] 2keep
-    dup update-title {
-        { "Article" [ help ] }
-        { "Links in" [ links-in. ] }
-    } swap help-gadget-tabs set-pages ;
+    dup add-history
+    [ set-help-gadget-showing ] 2keep
+    dup update-title
+    help-gadget-pane [ help ] with-pane ;
 
 : help-tool
     [ help-gadget? ]