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1× | "use strict";
// Parses CSS declarations and supports the property language (-ko-*) found between them.
// Create KO bindings but doesn't depend on KO.
// Needs a bindingProvider.
var converterUtils = require("./utils.js");
var cssParse = require("mensch/lib/parser.js");
var console = require("console");
var domutils = require("./domutils.js");
var _declarationValueLookup = function(declarations, propertyname, templateUrlConverter) {
for (var i = declarations.length - 1; i >= 0; i--) {
if (declarations[i].type == 'property' && declarations[i].name == propertyname) {
return _declarationValueUrlPrefixer(declarations[i].value, templateUrlConverter);
}
}
return null;
};
var _propToCamelCase = function(propName) {
return propName.replace(/-([a-z])/g, function(match, contents, offset, s) {
return contents.toUpperCase();
});
};
var _declarationValueUrlPrefixer = function(value, templateUrlConverter) {
if (value.match(/url\(.*\)/)) {
var replaced = value.replace(/(url\()([^\)]*)(\))/g, function(matched, prefix, url, postfix) {
var trimmed = url.trim();
var apice = url.trim().charAt(0);
if (apice == '\'' || apice == '"') {
trimmed = trimmed.substr(1, trimmed.length - 2);
} else {
apice = '';
}
var newUrl = templateUrlConverter(trimmed);
Eif (newUrl !== null) {
return prefix + apice + newUrl + apice + postfix;
} else {
return matched;
}
});
return replaced;
} else {
return value;
}
};
var elaborateDeclarations = function(style, declarations, templateUrlConverter, bindingProvider, element, basicBindings, removeDisplayNone) {
var newBindings = typeof basicBindings == 'object' && basicBindings !== null ? basicBindings : {};
var newStyle = null;
var skipLines = 0;
if (typeof declarations == 'undefined') {
var styleSheet = cssParse("#{\n" + style + "}", {
comments: true,
position: true
});
declarations = styleSheet.stylesheet.rules[0].declarations;
skipLines = 1;
}
for (var i = declarations.length - 1; i >= 0; i--)
if (declarations[i].type == 'property') {
if (removeDisplayNone === true && declarations[i].name == 'display' && declarations[i].value == 'none') {
if (newStyle === null) newStyle = style;
newStyle = converterUtils.removeStyle(newStyle, declarations[i].position.start, declarations[i].position.end, skipLines, 0, 0, '');
} else {
var decl = declarations[i].name.match(/^-ko-(bind-|attr-)?([a-z0-9-]*?)(-if|-ifnot)?$/);
if (decl !== null) {
// rimozione dello stile -ko- dall'attributo style.
if (newStyle === null && typeof style != 'undefined') newStyle = style;
var isAttr = decl[1] == 'attr-';
var isBind = decl[1] == 'bind-';
var propName = decl[2];
var isIf = decl[3] == '-if' || decl[3] == '-ifnot';
var condDecl;
var bindValue;
var propDefaultValue;
if (isIf) {
condDecl = declarations[i].name.substr(0, declarations[i].name.length - decl[3].length);
var conditionedDeclaration = _declarationValueLookup(declarations, condDecl, templateUrlConverter);
Iif (conditionedDeclaration === null) throw "Unable to find declaration " + condDecl + " for " + declarations[i].name;
} else {
if ((isAttr || isBind) && (typeof element == 'undefined' && typeof style != 'undefined')) throw "Attributes and bind declarations are only allowed in inline styles!";
var needDefaultValue = true;
var bindType;
if (isAttr) {
propDefaultValue = domutils.getAttribute(element, propName);
needDefaultValue = false;
bindType = 'virtualAttr';
} else if (!isBind) {
needDefaultValue = typeof style !== 'undefined';
if (needDefaultValue) propDefaultValue = _declarationValueLookup(declarations, propName, templateUrlConverter);
bindType = 'virtualStyle';
} else {
bindType = null;
Eif (propName == 'text') {
if (typeof element !== 'undefined') {
propDefaultValue = domutils.getInnerText(element);
} else {
needDefaultValue = false;
}
} else if (propName == 'html') {
if (typeof element !== 'undefined') {
propDefaultValue = domutils.getInnerHtml(element);
} else {
needDefaultValue = false;
}
} else {
needDefaultValue = false;
}
}
if (needDefaultValue && propDefaultValue === null) {
console.error("Cannot find default value for", declarations[i].name, declarations);
throw "Cannot find default value for " + declarations[i].name + ": " + declarations[i].value + " in " + element + " (" + typeof style + "/" + propName + ")";
}
var bindDefaultValue = propDefaultValue;
var bindName = _propToCamelCase(propName);
try {
bindValue = converterUtils.expressionBinding(declarations[i].value, bindingProvider, bindDefaultValue);
} catch (e) {
console.error("Model ensure path failed", e.stack, "name", declarations[i].name, "value", declarations[i].value, "default", propDefaultValue, "element", element);
throw e;
}
if (bindType !== null && typeof newBindings[bindType] == 'undefined') newBindings[bindType] = {};
// Special handling for HREFs
if (bindType == 'virtualAttr' && bindName == 'href') {
bindType = null;
bindName = 'wysiwygHref';
// We have to remove it, otherwise we ends up with 2 rules writing it.
Eif (typeof element != 'undefined' && element !== null) {
domutils.removeAttribute(element, "href");
}
}
// TODO evaluate the use of "-then" (and -else) postfixes to complete the -if instead of relaying
// on the same basic sintax (or maybe it is better to support ternary operator COND ? THEN : ELSE).
var declarationCondition = _declarationValueLookup(declarations, declarations[i].name + '-if', templateUrlConverter);
var not = false;
if (declarationCondition === null) {
declarationCondition = _declarationValueLookup(declarations, declarations[i].name + '-ifnot', templateUrlConverter);
not = true;
} else {
if (_declarationValueLookup(declarations, declarations[i].name + '-ifnot', templateUrlConverter) !== null) {
throw "Unexpected error: cannot use both -if and -ifnot property conditions";
}
}
if (declarationCondition !== null) {
try {
var bindingCond = converterUtils.conditionBinding(declarationCondition, bindingProvider);
bindValue = (not ? '!' : '') + "(" + bindingCond + ") ? " + bindValue + " : null";
} catch (e) {
console.error("Unable to deal with -ko style binding condition", declarationCondition, declarations[i].name);
throw e;
}
}
if (bindType !== null) newBindings[bindType][bindName] = bindValue;
else newBindings[bindName] = bindValue;
}
// parsing @supports :preview
if (newStyle !== null) {
try {
// if "element" is defined then we are parsing an "inline" style and we want to remove it.
if (typeof element != 'undefined' && element !== null) {
newStyle = converterUtils.removeStyle(newStyle, declarations[i].position.start, declarations[i].position.end, skipLines, 0, 0, '');
} else {
// otherwise we are parsing a full stylesheet.. let's rewrite the full "prop: value" without caring about the original syntax.
var replacedWith = '';
// if it is an "if" we simply have to remove it, otherwise we replace the input code with "prop: value" generating expression.
if (!isIf) replacedWith = propName + ': <!-- ko text: ' + bindValue + ' -->' + propDefaultValue + '<!-- /ko -->';
newStyle = converterUtils.removeStyle(newStyle, declarations[i].position.start, declarations[i].position.end, skipLines, 0, 0, replacedWith);
}
} catch (e) {
console.warn("Remove style failed", e, "name", declarations[i]);
throw e;
}
}
} else {
// prefixing urls
var replacedValue = _declarationValueUrlPrefixer(declarations[i].value, templateUrlConverter);
if (replacedValue != declarations[i].value) {
Iif (newStyle === null && typeof style !== 'undefined') newStyle = style;
Eif (newStyle !== null) {
try {
newStyle = converterUtils.removeStyle(newStyle, declarations[i].position.start, declarations[i].position.end, skipLines, 0, 0, declarations[i].name + ": " + replacedValue);
} catch (e) {
console.log("Remove style failed replacing url", e, "name", declarations[i]);
throw e;
}
}
}
// Style handling by concatenated "style attribute" (worse performance but more stable than direct style handling)
var bindName2 = _propToCamelCase(declarations[i].name);
var bind = 'virtualAttrStyle';
var bindVal2 = typeof newBindings['virtualStyle'] !== 'undefined' ? newBindings['virtualStyle'][bindName2] : undefined;
var dist = ' ';
if (typeof newBindings[bind] == 'undefined') {
newBindings[bind] = "''";
dist = '';
}
if (typeof bindVal2 !== 'undefined') {
newBindings[bind] = "'" + declarations[i].name + ": '+(" + bindVal2 + ")+';" + dist + "'+" + newBindings[bind];
delete newBindings['virtualStyle'][bindName2];
} else {
newBindings[bind] = "'" + declarations[i].name + ": " + converterUtils.addSlashes(replacedValue) + ";" + dist + "'+" + newBindings[bind];
}
}
}
}
if (typeof element != 'undefined' && element !== null) {
for (var prop in newBindings['virtualStyle'])
if (newBindings['virtualStyle'].hasOwnProperty(prop)) {
console.log("Unexpected virtualStyle binding after conversion to virtualAttr.style", prop, newBindings['virtualStyle'][prop], style);
throw "Unexpected virtualStyle binding after conversion to virtualAttr.style for " + prop;
}
delete newBindings['virtualStyle'];
var currentBindings = domutils.getAttribute(element, 'data-bind');
var dataBind = (currentBindings !== null ? currentBindings + ", " : "") + _bindingSerializer(newBindings);
domutils.setAttribute(element, 'data-bind', dataBind);
}
// TODO a function whose return type depends on the input parameters is very ugly.. please FIX ME.
if (typeof style == 'undefined') {
// clean virtualStyle if empty
var hasVirtualStyle = false;
for (var prop1 in newBindings['virtualStyle'])
Eif (newBindings['virtualStyle'].hasOwnProperty(prop1)) {
hasVirtualStyle = true;
break;
}
if (!hasVirtualStyle) delete newBindings['virtualStyle'];
else {
// remove and add back virtualAttrStyle so it gets appended BEFORE virtualAttrStyle (_bindingSerializer reverse them...)
Eif (typeof newBindings['virtualAttrStyle'] !== 'undefined') {
var vs = newBindings['virtualAttrStyle'];
delete newBindings['virtualAttrStyle'];
newBindings['virtualAttrStyle'] = vs;
}
}
// returns new serialized bindings
return _bindingSerializer(newBindings);
}
return newStyle;
};
var _bindingSerializer = function(val) {
var res = [];
for (var prop in val)
Eif (val.hasOwnProperty(prop)) {
if (typeof val[prop] == 'object') res.push(prop + ": " + "{ " + _bindingSerializer(val[prop]) + " }");
else res.push(prop + ": " + val[prop]);
}
return res.reverse().join(', ');
};
module.exports = elaborateDeclarations; |