You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
432 lines
11 KiB
432 lines
11 KiB
var List = require('css-tree').List;
|
|
var generate = require('css-tree').generate;
|
|
var walk = require('css-tree').walk;
|
|
|
|
var REPLACE = 1;
|
|
var REMOVE = 2;
|
|
var TOP = 0;
|
|
var RIGHT = 1;
|
|
var BOTTOM = 2;
|
|
var LEFT = 3;
|
|
var SIDES = ['top', 'right', 'bottom', 'left'];
|
|
var SIDE = {
|
|
'margin-top': 'top',
|
|
'margin-right': 'right',
|
|
'margin-bottom': 'bottom',
|
|
'margin-left': 'left',
|
|
|
|
'padding-top': 'top',
|
|
'padding-right': 'right',
|
|
'padding-bottom': 'bottom',
|
|
'padding-left': 'left',
|
|
|
|
'border-top-color': 'top',
|
|
'border-right-color': 'right',
|
|
'border-bottom-color': 'bottom',
|
|
'border-left-color': 'left',
|
|
'border-top-width': 'top',
|
|
'border-right-width': 'right',
|
|
'border-bottom-width': 'bottom',
|
|
'border-left-width': 'left',
|
|
'border-top-style': 'top',
|
|
'border-right-style': 'right',
|
|
'border-bottom-style': 'bottom',
|
|
'border-left-style': 'left'
|
|
};
|
|
var MAIN_PROPERTY = {
|
|
'margin': 'margin',
|
|
'margin-top': 'margin',
|
|
'margin-right': 'margin',
|
|
'margin-bottom': 'margin',
|
|
'margin-left': 'margin',
|
|
|
|
'padding': 'padding',
|
|
'padding-top': 'padding',
|
|
'padding-right': 'padding',
|
|
'padding-bottom': 'padding',
|
|
'padding-left': 'padding',
|
|
|
|
'border-color': 'border-color',
|
|
'border-top-color': 'border-color',
|
|
'border-right-color': 'border-color',
|
|
'border-bottom-color': 'border-color',
|
|
'border-left-color': 'border-color',
|
|
'border-width': 'border-width',
|
|
'border-top-width': 'border-width',
|
|
'border-right-width': 'border-width',
|
|
'border-bottom-width': 'border-width',
|
|
'border-left-width': 'border-width',
|
|
'border-style': 'border-style',
|
|
'border-top-style': 'border-style',
|
|
'border-right-style': 'border-style',
|
|
'border-bottom-style': 'border-style',
|
|
'border-left-style': 'border-style'
|
|
};
|
|
|
|
function TRBL(name) {
|
|
this.name = name;
|
|
this.loc = null;
|
|
this.iehack = undefined;
|
|
this.sides = {
|
|
'top': null,
|
|
'right': null,
|
|
'bottom': null,
|
|
'left': null
|
|
};
|
|
}
|
|
|
|
TRBL.prototype.getValueSequence = function(declaration, count) {
|
|
var values = [];
|
|
var iehack = '';
|
|
var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
|
|
var special = false;
|
|
|
|
switch (child.type) {
|
|
case 'Identifier':
|
|
switch (child.name) {
|
|
case '\\0':
|
|
case '\\9':
|
|
iehack = child.name;
|
|
return;
|
|
|
|
case 'inherit':
|
|
case 'initial':
|
|
case 'unset':
|
|
case 'revert':
|
|
special = child.name;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 'Dimension':
|
|
switch (child.unit) {
|
|
// is not supported until IE11
|
|
case 'rem':
|
|
|
|
// v* units is too buggy across browsers and better
|
|
// don't merge values with those units
|
|
case 'vw':
|
|
case 'vh':
|
|
case 'vmin':
|
|
case 'vmax':
|
|
case 'vm': // IE9 supporting "vm" instead of "vmin".
|
|
special = child.unit;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 'Hash': // color
|
|
case 'Number':
|
|
case 'Percentage':
|
|
break;
|
|
|
|
case 'Function':
|
|
if (child.name === 'var') {
|
|
return true;
|
|
}
|
|
|
|
special = child.name;
|
|
break;
|
|
|
|
case 'WhiteSpace':
|
|
return false; // ignore space
|
|
|
|
default:
|
|
return true; // bad value
|
|
}
|
|
|
|
values.push({
|
|
node: child,
|
|
special: special,
|
|
important: declaration.important
|
|
});
|
|
});
|
|
|
|
if (hasBadValues || values.length > count) {
|
|
return false;
|
|
}
|
|
|
|
if (typeof this.iehack === 'string' && this.iehack !== iehack) {
|
|
return false;
|
|
}
|
|
|
|
this.iehack = iehack; // move outside
|
|
|
|
return values;
|
|
};
|
|
|
|
TRBL.prototype.canOverride = function(side, value) {
|
|
var currentValue = this.sides[side];
|
|
|
|
return !currentValue || (value.important && !currentValue.important);
|
|
};
|
|
|
|
TRBL.prototype.add = function(name, declaration) {
|
|
function attemptToAdd() {
|
|
var sides = this.sides;
|
|
var side = SIDE[name];
|
|
|
|
if (side) {
|
|
if (side in sides === false) {
|
|
return false;
|
|
}
|
|
|
|
var values = this.getValueSequence(declaration, 1);
|
|
|
|
if (!values || !values.length) {
|
|
return false;
|
|
}
|
|
|
|
// can mix only if specials are equal
|
|
for (var key in sides) {
|
|
if (sides[key] !== null && sides[key].special !== values[0].special) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!this.canOverride(side, values[0])) {
|
|
return true;
|
|
}
|
|
|
|
sides[side] = values[0];
|
|
return true;
|
|
} else if (name === this.name) {
|
|
var values = this.getValueSequence(declaration, 4);
|
|
|
|
if (!values || !values.length) {
|
|
return false;
|
|
}
|
|
|
|
switch (values.length) {
|
|
case 1:
|
|
values[RIGHT] = values[TOP];
|
|
values[BOTTOM] = values[TOP];
|
|
values[LEFT] = values[TOP];
|
|
break;
|
|
|
|
case 2:
|
|
values[BOTTOM] = values[TOP];
|
|
values[LEFT] = values[RIGHT];
|
|
break;
|
|
|
|
case 3:
|
|
values[LEFT] = values[RIGHT];
|
|
break;
|
|
}
|
|
|
|
// can mix only if specials are equal
|
|
for (var i = 0; i < 4; i++) {
|
|
for (var key in sides) {
|
|
if (sides[key] !== null && sides[key].special !== values[i].special) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (var i = 0; i < 4; i++) {
|
|
if (this.canOverride(SIDES[i], values[i])) {
|
|
sides[SIDES[i]] = values[i];
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (!attemptToAdd.call(this)) {
|
|
return false;
|
|
}
|
|
|
|
// TODO: use it when we can refer to several points in source
|
|
// if (this.loc) {
|
|
// this.loc = {
|
|
// primary: this.loc,
|
|
// merged: declaration.loc
|
|
// };
|
|
// } else {
|
|
// this.loc = declaration.loc;
|
|
// }
|
|
if (!this.loc) {
|
|
this.loc = declaration.loc;
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
TRBL.prototype.isOkToMinimize = function() {
|
|
var top = this.sides.top;
|
|
var right = this.sides.right;
|
|
var bottom = this.sides.bottom;
|
|
var left = this.sides.left;
|
|
|
|
if (top && right && bottom && left) {
|
|
var important =
|
|
top.important +
|
|
right.important +
|
|
bottom.important +
|
|
left.important;
|
|
|
|
return important === 0 || important === 4;
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
TRBL.prototype.getValue = function() {
|
|
var result = new List();
|
|
var sides = this.sides;
|
|
var values = [
|
|
sides.top,
|
|
sides.right,
|
|
sides.bottom,
|
|
sides.left
|
|
];
|
|
var stringValues = [
|
|
generate(sides.top.node),
|
|
generate(sides.right.node),
|
|
generate(sides.bottom.node),
|
|
generate(sides.left.node)
|
|
];
|
|
|
|
if (stringValues[LEFT] === stringValues[RIGHT]) {
|
|
values.pop();
|
|
if (stringValues[BOTTOM] === stringValues[TOP]) {
|
|
values.pop();
|
|
if (stringValues[RIGHT] === stringValues[TOP]) {
|
|
values.pop();
|
|
}
|
|
}
|
|
}
|
|
|
|
for (var i = 0; i < values.length; i++) {
|
|
if (i) {
|
|
result.appendData({ type: 'WhiteSpace', value: ' ' });
|
|
}
|
|
|
|
result.appendData(values[i].node);
|
|
}
|
|
|
|
if (this.iehack) {
|
|
result.appendData({ type: 'WhiteSpace', value: ' ' });
|
|
result.appendData({
|
|
type: 'Identifier',
|
|
loc: null,
|
|
name: this.iehack
|
|
});
|
|
}
|
|
|
|
return {
|
|
type: 'Value',
|
|
loc: null,
|
|
children: result
|
|
};
|
|
};
|
|
|
|
TRBL.prototype.getDeclaration = function() {
|
|
return {
|
|
type: 'Declaration',
|
|
loc: this.loc,
|
|
important: this.sides.top.important,
|
|
property: this.name,
|
|
value: this.getValue()
|
|
};
|
|
};
|
|
|
|
function processRule(rule, shorts, shortDeclarations, lastShortSelector) {
|
|
var declarations = rule.block.children;
|
|
var selector = rule.prelude.children.first().id;
|
|
|
|
rule.block.children.eachRight(function(declaration, item) {
|
|
var property = declaration.property;
|
|
|
|
if (!MAIN_PROPERTY.hasOwnProperty(property)) {
|
|
return;
|
|
}
|
|
|
|
var key = MAIN_PROPERTY[property];
|
|
var shorthand;
|
|
var operation;
|
|
|
|
if (!lastShortSelector || selector === lastShortSelector) {
|
|
if (key in shorts) {
|
|
operation = REMOVE;
|
|
shorthand = shorts[key];
|
|
}
|
|
}
|
|
|
|
if (!shorthand || !shorthand.add(property, declaration)) {
|
|
operation = REPLACE;
|
|
shorthand = new TRBL(key);
|
|
|
|
// if can't parse value ignore it and break shorthand children
|
|
if (!shorthand.add(property, declaration)) {
|
|
lastShortSelector = null;
|
|
return;
|
|
}
|
|
}
|
|
|
|
shorts[key] = shorthand;
|
|
shortDeclarations.push({
|
|
operation: operation,
|
|
block: declarations,
|
|
item: item,
|
|
shorthand: shorthand
|
|
});
|
|
|
|
lastShortSelector = selector;
|
|
});
|
|
|
|
return lastShortSelector;
|
|
}
|
|
|
|
function processShorthands(shortDeclarations, markDeclaration) {
|
|
shortDeclarations.forEach(function(item) {
|
|
var shorthand = item.shorthand;
|
|
|
|
if (!shorthand.isOkToMinimize()) {
|
|
return;
|
|
}
|
|
|
|
if (item.operation === REPLACE) {
|
|
item.item.data = markDeclaration(shorthand.getDeclaration());
|
|
} else {
|
|
item.block.remove(item.item);
|
|
}
|
|
});
|
|
}
|
|
|
|
module.exports = function restructBlock(ast, indexer) {
|
|
var stylesheetMap = {};
|
|
var shortDeclarations = [];
|
|
|
|
walk(ast, {
|
|
visit: 'Rule',
|
|
reverse: true,
|
|
enter: function(node) {
|
|
var stylesheet = this.block || this.stylesheet;
|
|
var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
|
|
var ruleMap;
|
|
var shorts;
|
|
|
|
if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
|
|
ruleMap = {
|
|
lastShortSelector: null
|
|
};
|
|
stylesheetMap[stylesheet.id] = ruleMap;
|
|
} else {
|
|
ruleMap = stylesheetMap[stylesheet.id];
|
|
}
|
|
|
|
if (ruleMap.hasOwnProperty(ruleId)) {
|
|
shorts = ruleMap[ruleId];
|
|
} else {
|
|
shorts = {};
|
|
ruleMap[ruleId] = shorts;
|
|
}
|
|
|
|
ruleMap.lastShortSelector = processRule.call(this, node, shorts, shortDeclarations, ruleMap.lastShortSelector);
|
|
}
|
|
});
|
|
|
|
processShorthands(shortDeclarations, indexer.declaration);
|
|
};
|
|
|