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Merge pull request #458 from fat/assignment-entities

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Assignment entities
This commit is contained in:
Alexis Sellier
2011-11-24 16:14:39 -08:00
parent 0e01c72560 416efd3b60
commit 920034233b
5 changed files with 51 additions and 7 deletions
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11
lib/less/index.js
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@@ -73,11 +73,12 @@ var less = {
}
};
['color', 'directive', 'operation', 'dimension',
'keyword', 'variable', 'ruleset', 'element',
'selector', 'quoted', 'expression', 'rule',
'call', 'url', 'alpha', 'import',
'mixin', 'comment', 'anonymous', 'value', 'javascript'
['color', 'directive', 'operation', 'dimension',
'keyword', 'variable', 'ruleset', 'element',
'selector', 'quoted', 'expression', 'rule',
'call', 'url', 'alpha', 'import',
'mixin', 'comment', 'anonymous', 'value',
'javascript', 'assignment'
].forEach(function (n) {
require('./tree/' + n);
});

17
lib/less/parser.js
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@@ -502,7 +502,7 @@ less.Parser = function Parser(env) {
call: function () {
var name, args, index = i;
if (! (name = /^([\w-]+|%)\(/.exec(chunks[j]))) return;
if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) return;
name = name[1].toLowerCase();
@@ -522,7 +522,7 @@ less.Parser = function Parser(env) {
arguments: function () {
var args = [], arg;
while (arg = $(this.expression)) {
while (arg = $(this.entities.assignment) || $(this.expression)) {
args.push(arg);
if (! $(',')) { break }
}
@@ -534,6 +534,19 @@ less.Parser = function Parser(env) {
$(this.entities.quoted);
},
// Assignments are argument entities for calls.
// They are present in ie filter properties as shown below.
//
// filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )
//
assignment: function () {
var key, value;
if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) {
return new(tree.Assignment)(key, value);
}
},
//
// Parse url() tokens
//

17
lib/less/tree/assignment.js Normal file
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@@ -0,0 +1,17 @@
(function (tree) {
tree.Assignment = function (key, val) {
this.key = key;
this.value = val;
};
tree.Assignment.prototype = {
toCSS: function () {
return this.key + '=' + (this.value.toCSS ? this.value.toCSS() : this.value);
},
eval: function (env) {
if (this.value.eval) { this.value = this.value.eval(env) }
return this;
}
};
})(require('../tree'));

5
test/css/ie-filters.css Normal file
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@@ -0,0 +1,5 @@
.nav {
filter: progid:dximagetransform.microsoft.alpha(opacity=20);
filter: progid:dximagetransform.microsoft.alpha(opacity=0);
filter: progid:dximagetransform.microsoft.gradient(startColorstr="#333333", endColorstr="#000000", GradientType=0);
}

8
test/less/ie-filters.less Normal file
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@@ -0,0 +1,8 @@
@fat: 0;
@cloudhead: "#000000";
.nav {
filter: progid:DXImageTransform.Microsoft.Alpha(opacity = 20);
filter: progid:DXImageTransform.Microsoft.Alpha(opacity=@fat);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#333333", endColorstr=@cloudhead, GradientType=@fat);
}