list-packages: Progressive Enhancement approach to JS.
* build-aux/list-packages.scm (package->sxml): Add parameters previous,
description-ids and remaining, update docstring accordingly. Introduce logic
for fold-values process.
(insert-tr): Moved sxml package table-row generation to new function; remove
<a> elements and JS function calls. These are created through JS
(prep_pkg_descs). Add insert-js-call for every 15th package, and the last.
(insert-js-call): New function.
(packages->sxml): Change map to fold values; add init params.
(insert-js): show_hide: add compatibility check, introduce, use thingLink
prep: new JS function.
bulk_show_hide: new JS function.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
master
Alex Sassmannshausen
Ludovic Courtès
parent
4fd6bf5337
commit
a4141d6d53
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@ -29,6 +29,7 @@ exec guile -l "$0" \
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#:use-module (guix gnu-maintenance)
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#:use-module (gnu packages)
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#:use-module (sxml simple)
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#:use-module (sxml fold)
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#:use-module (web uri)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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@ -48,8 +49,13 @@ exec guile -l "$0" \
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(equal? (gnu-package-name package) name))
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gnu))))
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(define (package->sxml package)
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"Return HTML-as-SXML representing PACKAGE."
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(define (package->sxml package previous description-ids remaining)
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"Return 3 values: the HTML-as-SXML for PACKAGE added to all previously
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collected package output in PREVIOUS, a list of DESCRIPTION-IDS and the number
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of packages still to be processed in REMAINING. Also Introduces a call to the
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JavaScript prep_pkg_descs function as part of the output of PACKAGE, every
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time the length of DESCRIPTION-IDS, increasing, is 15 or when REMAINING,
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decreasing, is 1."
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(define (source-url package)
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(let ((loc (package-location package)))
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(and loc
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@ -92,37 +98,66 @@ exec guile -l "$0" \
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(and=> (lookup-gnu-package name)
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gnu-package-logo))
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(define (insert-tr description-id js?)
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(define (insert-js-call description-ids)
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"Return an sxml call to prep_pkg_descs, with up to 15 elements of
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description-ids as formal parameters."
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`(script (@ (type "text/javascript"))
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,(format #f "prep_pkg_descs(~a)"
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(string-append "'"
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(string-join description-ids "', '")
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"'"))))
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(let ((description-ids (cons description-id description-ids)))
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`(tr (td ,(if (gnu-package? package)
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`(img (@ (src "/graphics/gnu-head-mini.png")
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(alt "Part of GNU")
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(title "Part of GNU")))
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""))
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(td (a (@ (href ,(source-url package))
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(title "Link to the Guix package source code"))
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,(package-name package) " "
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,(package-version package)))
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(td (span ,(package-synopsis package))
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(div (@ (id ,description-id))
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,(match (package-logo (package-name package))
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((? string? url)
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`(img (@ (src ,url)
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(height "35")
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(class "package-logo")
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(alt ("Logo of " ,(package-name package))))))
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(_ #f))
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(p ,(package-description package))
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,(license package)
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(a (@ (href ,(package-home-page package))
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(title "Link to the package's website"))
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,(package-home-page package))
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,(status package)
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,(if js?
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(insert-js-call description-ids)
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""))))))
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(let ((description-id (symbol->string
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(gensym (package-name package)))))
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`(tr (td ,(if (gnu-package? package)
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`(img (@ (src "/graphics/gnu-head-mini.png")
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(alt "Part of GNU")
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(title "Part of GNU")))
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""))
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(td (a (@ (href ,(source-url package))
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(title "Link to the Guix package source code"))
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,(package-name package) " "
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,(package-version package)))
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(td (a (@ (href "javascript:void(0)")
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(title "show/hide package description")
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(onClick ,(format #f "javascript:show_hide('~a')"
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description-id)))
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,(package-synopsis package))
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(div (@ (id ,description-id)
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(style "display: none;"))
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,(match (package-logo (package-name package))
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((? string? url)
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`(img (@ (src ,url)
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(height "35")
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(class "package-logo")
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(alt ("Logo of " ,(package-name package))))))
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(_ #f))
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(p ,(package-description package))
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,(license package)
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(a (@ (href ,(package-home-page package))
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(title "Link to the package's website"))
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,(package-home-page package))
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,(status package))))))
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(cond ((= remaining 1) ; Last package in packages
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(values
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(reverse ; Fold has reversed packages
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(cons (insert-tr description-id 'js) ; Prefix final sxml
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previous))
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'() ; No more work to do
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0)) ; End of the line
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((= (length description-ids) 15) ; Time for a JS call
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(values
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(cons (insert-tr description-id 'js)
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previous) ; Prefix new sxml
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'() ; Reset description-ids
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(1- remaining))) ; Reduce remaining
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(else ; Insert another row, and build description-ids
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(values
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(cons (insert-tr description-id #f)
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previous) ; Prefix new sxml
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(cons description-id description-ids) ; Update description-ids
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(1- remaining)))))) ; Reduce remaining
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(define (packages->sxml packages)
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"Return an HTML page as SXML describing PACKAGES."
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@ -145,7 +180,7 @@ exec guile -l "$0" \
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(tr (th "GNU?")
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(th "Package version")
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(th "Package details"))
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,@(map package->sxml packages))
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,@(fold-values package->sxml packages '() '() (length packages)))
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(a (@ (href "#intro")
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(title "Back to top.")
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(id "top"))
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@ -239,14 +274,45 @@ a#top:hover, a#top:focus {
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// license: CC0
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function show_hide(idThing)
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{
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if(document.getElementById && document.createTextNode) {
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var thing = document.getElementById(idThing);
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/* Used to change the link text, depending on whether description is
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collapsed or expanded */
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var thingLink = thing.previousSibling.lastChild.firstChild;
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if (thing) {
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if (thing.style.display == \"none\") {
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thing.style.display = \"\";
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thingLink.data = 'Collapse';
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} else {
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thing.style.display = \"none\";
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thingLink.data = 'Expand';
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}
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}
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}
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}
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/* Add controllers used for collapse/expansion of package descriptions */
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function prep(idThing)
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{
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var tdThing = document.getElementById(idThing).parentNode;
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if (tdThing) {
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var aThing = tdThing.firstChild.appendChild(document.createElement('a'));
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aThing.setAttribute('href', 'javascript:void(0)');
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aThing.setAttribute('title', 'show/hide package description');
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aThing.appendChild(document.createTextNode('Expand'));
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aThing.onclick=function(){show_hide(idThing);};
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/* aThing.onkeypress=function(){show_hide(idThing);}; */
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}
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}
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/* Take n element IDs, prepare them for javascript enhanced
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display and hide the IDs by default. */
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function prep_pkg_descs()
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{
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if(document.getElementById && document.createTextNode) {
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for(var i=0; i<arguments.length; i++) {
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prep(arguments[i])
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show_hide(arguments[i]);
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}
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}
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}
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</script>"))
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