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Merge pull request #819 from peitschie/odf-field-view
Extract ODF field highlighting into standalone view
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /** | ||
| * Copyright (C) 2010-2014 KO GmbH <[email protected]> | ||
| * | ||
| * @licstart | ||
| * This file is part of WebODF. | ||
| * | ||
| * WebODF is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU Affero General Public License (GNU AGPL) | ||
| * as published by the Free Software Foundation, either version 3 of | ||
| * the License, or (at your option) any later version. | ||
| * | ||
| * WebODF is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with WebODF. If not, see <http://www.gnu.org/licenses/>. | ||
| * @licend | ||
| * | ||
| * @source: http://www.webodf.org/ | ||
| * @source: https://github.com/kogmbh/WebODF/ | ||
| */ | ||
|
|
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| /*global gui, odf*/ | ||
|
|
||
| /** | ||
| * Show ODF fields in an ODT document. | ||
| * | ||
| * @constructor | ||
| * @implements {core.Destroyable} | ||
| * @param {!odf.OdfCanvas} odfCanvas | ||
| */ | ||
| gui.OdfFieldView = function(odfCanvas) { | ||
| "use strict"; | ||
| var /**@type{!HTMLStyleElement}*/ | ||
| style, | ||
| document = odfCanvas.getElement().ownerDocument; | ||
|
|
||
| /** | ||
| * @return {!HTMLStyleElement} | ||
| */ | ||
| function newStyleSheet() { | ||
| var head = document.getElementsByTagName('head').item(0), | ||
| sheet = /**@type{!HTMLStyleElement}*/(document.createElement('style')), | ||
| /**@type{!string}*/ | ||
| text = ""; | ||
|
|
||
| sheet.type = 'text/css'; | ||
| sheet.media = 'screen, print, handheld, projection'; | ||
| odf.Namespaces.forEachPrefix(function(prefix, ns) { | ||
| text += "@namespace " + prefix + " url(" + ns + ");\n"; | ||
| }); | ||
| sheet.appendChild(document.createTextNode(text)); | ||
| head.appendChild(sheet); | ||
| return sheet; | ||
| } | ||
|
|
||
| /** | ||
| * @param {!HTMLStyleElement} style | ||
| * @return {undefined} | ||
| */ | ||
| function clearCSSStyleSheet(style) { | ||
| var stylesheet = /**@type{!CSSStyleSheet}*/(style.sheet), | ||
| cssRules = stylesheet.cssRules; | ||
|
|
||
| while (cssRules.length) { | ||
| stylesheet.deleteRule(cssRules.length - 1); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * @param {!Array.<!string>} selectors | ||
| * @param {!string} css | ||
| * @return {!string} | ||
| */ | ||
| function createRule(selectors, css) { | ||
| return selectors.join(",\n") + "\n" + css + "\n"; | ||
| } | ||
|
|
||
| /** | ||
| * Applies a grey background to all ODF field containers as defined in the container definitions within | ||
| * this class. | ||
| * | ||
| * @return {!string} | ||
| */ | ||
| function generateFieldCSS() { | ||
| var /**@type{!Array.<!string>}*/ | ||
| cssSelectors = odf.OdfSchema.getFields().map(function(prefixedName) { return prefixedName.replace(":", "|"); }), | ||
| highlightFields = createRule(cssSelectors, "{ background-color: #D0D0D0; }"), | ||
| emptyCssSelectors = cssSelectors.map(function(selector) { return selector + ":empty::after"; }), | ||
| // Ensure fields are always visible even if they contain no content | ||
| highlightEmptyFields = createRule(emptyCssSelectors, "{ content:' '; white-space: pre; }"); | ||
|
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| return highlightFields + "\n" + highlightEmptyFields; | ||
| } | ||
|
|
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| /** | ||
| * @return {undefined} | ||
| */ | ||
| this.showFieldHighlight = function() { | ||
| style.appendChild(document.createTextNode(generateFieldCSS())); | ||
| }; | ||
|
|
||
| /** | ||
| * @return {undefined} | ||
| */ | ||
| this.hideFieldHighlight = function() { | ||
| clearCSSStyleSheet(style); | ||
| }; | ||
|
|
||
| /** | ||
| * Destroy the object. | ||
| * Do not access any member of this object after this call. | ||
| * @param {function(!Error=):undefined} callback | ||
| * @return {undefined} | ||
| */ | ||
| this.destroy = function(callback) { | ||
| if (style.parentNode) { | ||
| style.parentNode.removeChild(style); | ||
| } | ||
| callback(); | ||
| }; | ||
|
|
||
| function init() { | ||
| style = newStyleSheet(); | ||
| } | ||
| init(); | ||
| }; |
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