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Create BrowserParserCss

pull/1446/head
Artur Arseniev 8 years ago
parent
7226625403
commit
5f60908f72
3 changed files with 210 additions and 195 deletions
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  1. 4
      src/editor/model/Editor.js
  2. 200
      src/parser/model/BrowserParserCss.js
  3. 201
      src/parser/model/ParserCss.js

4
src/editor/model/Editor.js
View File

@ -641,5 +641,9 @@ module.exports = Backbone.Model.extend({
} else { } else {
el[varName][name] = value; el[varName][name] = value;
} }
},
getCustomParserCss() {
return null;
} }
}); });

200
src/parser/model/BrowserParserCss.js
View File

@ -0,0 +1,200 @@
import { keys } from 'underscore';
// At-rules
// https://developer.mozilla.org/it/docs/Web/API/CSSRule#Type_constants
const atRules = {
4: 'media',
5: 'font-face',
6: 'page',
7: 'keyframes',
11: 'counter-style',
12: 'supports',
13: 'document',
14: 'font-feature-values',
15: 'viewport'
};
const atRuleKeys = keys(atRules);
const singleAtRules = ['5', '6', '11', '15'];
/**
* Parse selector string to array.
* Only classe based are valid as CSS rules inside editor, not valid
* selectors will be dropped as additional
* It's ok with the last part of the string as state (:hover, :active)
* @param {string} str Selectors string
* @return {Object}
* @example
* var res = parseSelector('.test1, .test1.test2, .test2 .test3');
* console.log(res);
* // {
* //result: [['test1'], ['test1', 'test2']],
* //add: ['.test2 .test3']
* //}
*/
export const parseSelector = (str = '') => {
const add = [];
const result = [];
const sels = str.split(',');
for (var i = 0, len = sels.length; i < len; i++) {
var sel = sels[i].trim();
// Will accept only concatenated classes and last
// class might be with state (eg. :hover), nothing else.
// Can also accept SINGLE ID selectors, eg. `#myid`, `#myid:hover`
// Composed are not valid: `#myid.some-class`, `#myid.some-class:hover`
if (
/^(\.{1}[\w\-]+)+(:{1,2}[\w\-()]+)?$/gi.test(sel) ||
/^(#{1}[\w\-]+){1}(:{1,2}[\w\-()]+)?$/gi.test(sel)
) {
var cls = sel.split('.').filter(Boolean);
result.push(cls);
} else {
add.push(sel);
}
}
return {
result,
add
};
};
/**
* Parse style declarations of the node
* @param {CSSRule} node
* @return {Object}
*/
export const parseStyle = node => {
const stl = node.style;
const style = {};
for (var i = 0, len = stl.length; i < len; i++) {
const propName = stl[i];
const propValue = stl.getPropertyValue(propName);
const important = stl.getPropertyPriority(propName);
style[propName] = `${propValue}${important ? ` !${important}` : ''}`;
}
return style;
};
/**
* Get the condition when possible
* @param {CSSRule} node
* @return {string}
*/
export const parseCondition = node => {
const condition =
node.conditionText ||
(node.media && node.media.mediaText) ||
node.name ||
node.selectorText ||
'';
return condition.trim();
};
/**
* Fetch data from node
* @param {StyleSheet|CSSRule} el
* @return {Array<Object>}
*/
export const parseNode = el => {
var result = [];
var nodes = el.cssRules || [];
for (var i = 0, len = nodes.length; i < len; i++) {
const node = nodes[i];
const type = node.type.toString();
let singleAtRule = 0;
let atRuleType = '';
let condition = '';
// keyText is for CSSKeyframeRule
let sels = node.selectorText || node.keyText;
const isSingleAtRule = singleAtRules.indexOf(type) >= 0;
// Check if the node is an at-rule
if (isSingleAtRule) {
singleAtRule = 1;
atRuleType = atRules[type];
condition = parseCondition(node);
} else if (atRuleKeys.indexOf(type) >= 0) {
var subRules = parseNode(node);
condition = parseCondition(node);
for (var s = 0, lens = subRules.length; s < lens; s++) {
var subRule = subRules[s];
condition && (subRule.mediaText = condition);
subRule.atRuleType = atRules[type];
}
result = result.concat(subRules);
}
if (!sels && !isSingleAtRule) continue;
const style = parseStyle(node);
const selsParsed = parseSelector(sels);
const selsAdd = selsParsed.add;
sels = selsParsed.result;
let lastRule;
// For each group of selectors
for (var k = 0, len3 = sels.length; k < len3; k++) {
var selArr = sels[k];
var model = {};
singleAtRule && (model.singleAtRule = singleAtRule);
atRuleType && (model.atRuleType = atRuleType);
//Isolate state from selector
var stateArr = selArr[selArr.length - 1].split(/:(.+)/);
if (stateArr[1]) {
selArr[selArr.length - 1] = stateArr[0];
model.state = stateArr[1];
stateArr.splice(stateArr.length - 1, 1);
}
model.selectors = selArr;
model.style = style;
lastRule = model;
result.push(model);
}
// Need to push somewhere not class-based selectors, if some rule was
// created will push them there, otherwise will create a new rule
if (selsAdd.length) {
var selsAddStr = selsAdd.join(', ');
if (lastRule) {
lastRule.selectorsAdd = selsAddStr;
} else {
const model = {
selectors: [],
selectorsAdd: selsAddStr,
style
};
singleAtRule && (model.singleAtRule = singleAtRule);
atRuleType && (model.atRuleType = atRuleType);
condition && (model.mediaText = condition);
result.push(model);
}
}
// console.log('LAST PUSH', result[result.length - 1]);
}
return result;
};
/**
* Parse CSS string and return the array of objects
* @param {String} str CSS string
* @return {Array<Object>} Array of objects for the definition of CSSRules
*/
export default str => {
const el = document.createElement('style');
el.innerHTML = str;
// There is no .sheet before adding it to the <head>
document.head.appendChild(el);
const sheet = el.sheet;
document.head.removeChild(el);
return parseNode(sheet);
};

201
src/parser/model/ParserCss.js
View File

@ -1,203 +1,14 @@
import { keys } from 'underscore'; import BrowserCssParser from './BrowserParserCss';
// At-rules
// https://developer.mozilla.org/it/docs/Web/API/CSSRule#Type_constants
const atRules = {
4: 'media',
5: 'font-face',
6: 'page',
7: 'keyframes',
11: 'counter-style',
12: 'supports',
13: 'document',
14: 'font-feature-values',
15: 'viewport'
};
const atRuleKeys = keys(atRules);
const singleAtRules = ['5', '6', '11', '15'];
module.exports = config => ({ module.exports = config => ({
/**
* Parse selector string to array.
* Only classe based are valid as CSS rules inside editor, not valid
* selectors will be dropped as additional
* It's ok with the last part of the string as state (:hover, :active)
* @param {string} str Selectors string
* @return {Object}
* @example
* var res = ParserCss.parseSelector('.test1, .test1.test2, .test2 .test3');
* console.log(res);
* // {
* //result: [['test1'], ['test1', 'test2']],
* //add: ['.test2 .test3']
* //}
*/
parseSelector(str = '') {
const add = [];
const result = [];
const sels = str.split(',');
for (var i = 0, len = sels.length; i < len; i++) {
var sel = sels[i].trim();
// Will accept only concatenated classes and last
// class might be with state (eg. :hover), nothing else.
// Can also accept SINGLE ID selectors, eg. `#myid`, `#myid:hover`
// Composed are not valid: `#myid.some-class`, `#myid.some-class:hover`
if (
/^(\.{1}[\w\-]+)+(:{1,2}[\w\-()]+)?$/gi.test(sel) ||
/^(#{1}[\w\-]+){1}(:{1,2}[\w\-()]+)?$/gi.test(sel)
) {
var cls = sel.split('.').filter(Boolean);
result.push(cls);
} else {
add.push(sel);
}
}
return {
result,
add
};
},
/**
* Parse style declarations of the node
* @param {CSSRule} node
* @return {Object}
*/
parseStyle(node) {
const stl = node.style;
const style = {};
for (var i = 0, len = stl.length; i < len; i++) {
const propName = stl[i];
const propValue = stl.getPropertyValue(propName);
const important = stl.getPropertyPriority(propName);
style[propName] = `${propValue}${important ? ` !${important}` : ''}`;
}
return style;
},
/**
* Get the condition when possible
* @param {CSSRule} node
* @return {string}
*/
parseCondition(node) {
const condition =
node.conditionText ||
(node.media && node.media.mediaText) ||
node.name ||
node.selectorText ||
'';
return condition.trim();
},
/**
* Fetch data from node
* @param {StyleSheet|CSSRule} el
* @return {Array<Object>}
*/
parseNode(el) {
var result = [];
var nodes = el.cssRules || [];
for (var i = 0, len = nodes.length; i < len; i++) {
const node = nodes[i];
const type = node.type.toString();
let singleAtRule = 0;
let atRuleType = '';
let condition = '';
// keyText is for CSSKeyframeRule
let sels = node.selectorText || node.keyText;
const isSingleAtRule = singleAtRules.indexOf(type) >= 0;
// Check if the node is an at-rule
if (isSingleAtRule) {
singleAtRule = 1;
atRuleType = atRules[type];
condition = this.parseCondition(node);
} else if (atRuleKeys.indexOf(type) >= 0) {
var subRules = this.parseNode(node);
condition = this.parseCondition(node);
for (var s = 0, lens = subRules.length; s < lens; s++) {
var subRule = subRules[s];
condition && (subRule.mediaText = condition);
subRule.atRuleType = atRules[type];
}
result = result.concat(subRules);
}
if (!sels && !isSingleAtRule) continue;
const style = this.parseStyle(node);
const selsParsed = this.parseSelector(sels);
const selsAdd = selsParsed.add;
sels = selsParsed.result;
let lastRule;
// For each group of selectors
for (var k = 0, len3 = sels.length; k < len3; k++) {
var selArr = sels[k];
var model = {};
singleAtRule && (model.singleAtRule = singleAtRule);
atRuleType && (model.atRuleType = atRuleType);
//Isolate state from selector
var stateArr = selArr[selArr.length - 1].split(/:(.+)/);
if (stateArr[1]) {
selArr[selArr.length - 1] = stateArr[0];
model.state = stateArr[1];
stateArr.splice(stateArr.length - 1, 1);
}
model.selectors = selArr;
model.style = style;
lastRule = model;
result.push(model);
}
// Need to push somewhere not class-based selectors, if some rule was
// created will push them there, otherwise will create a new rule
if (selsAdd.length) {
var selsAddStr = selsAdd.join(', ');
if (lastRule) {
lastRule.selectorsAdd = selsAddStr;
} else {
const model = {
selectors: [],
selectorsAdd: selsAddStr,
style
};
singleAtRule && (model.singleAtRule = singleAtRule);
atRuleType && (model.atRuleType = atRuleType);
condition && (model.mediaText = condition);
result.push(model);
}
}
// console.log('LAST PUSH', result[result.length - 1]);
}
return result;
},
/** /**
* Parse CSS string to a desired model object * Parse CSS string to a desired model object
* @param {string} str HTML string * @param {String} str CSS string
* @return {Object|Array<Object>} * @return {Array<Object>}
*/ */
parse(str) { parse(str) {
const el = document.createElement('style'); const { em } = config;
el.innerHTML = str; const customParser = em.getCustomParserCss();
return customParser ? customParser(str) : BrowserCssParser(str);
// There is no .sheet before adding it to the <head>
document.head.appendChild(el);
const sheet = el.sheet;
document.head.removeChild(el);
const result = this.parseNode(sheet);
return result.length == 1 ? result[0] : result;
} }
}); });

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