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Annotation of modules/damieng/graphical_editor/loncapa_daxe/web/nodes/section.dart, revision 1.1

1.1     ! damieng     1: /*
        !             2:   This file is part of LONCAPA-Daxe.
        !             3: 
        !             4:   LONCAPA-Daxe is free software: you can redistribute it and/or modify
        !             5:   it under the terms of the GNU General Public License as published by
        !             6:   the Free Software Foundation, either version 3 of the License, or
        !             7:   (at your option) any later version.
        !             8: 
        !             9:   LONCAPA-Daxe is distributed in the hope that it will be useful,
        !            10:   but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            12:   GNU General Public License for more details.
        !            13: 
        !            14:   You should have received a copy of the GNU General Public License
        !            15:   along with Daxe.  If not, see <http://www.gnu.org/licenses/>.
        !            16: */
        !            17: 
        !            18: part of loncapa_daxe;
        !            19: 
        !            20: /**
        !            21:  * Display for HTML section, with a possible simple UI.
        !            22:  * Jaxe display type: 'section'.
        !            23:  */
        !            24: class Section extends LCDBlock {
        !            25:   
        !            26:   static List<String> simpleUIAttributes = ['class'];
        !            27:   bool displaySimpleButton = true;
        !            28:   
        !            29:   Section.fromRef(x.Element elementRef) : super.fromRef(elementRef) {
        !            30:   }
        !            31:   
        !            32:   Section.fromNode(x.Node node, DaxeNode parent) : super.fromNode(node, parent) {
        !            33:     if (node.ownerDocument.documentElement != null) {
        !            34:       if (simpleUIPossibleNoThrow())
        !            35:         setupSimpleUI();
        !            36:     }
        !            37:   }
        !            38:   
        !            39:   @override
        !            40:   bool simpleUIPossible() {
        !            41:     for (DaxeAttr att in attributes) {
        !            42:       if (!simpleUIAttributes.contains(att.name))
        !            43:         throw new SimpleUIException('section: ' + LCDStrings.get('attribute_problem') + ' ' + att.name);
        !            44:     }
        !            45:     if (firstChild != null && firstChild is! H1)
        !            46:       return false;
        !            47:     return true;
        !            48:   }
        !            49:   
        !            50:   @override
        !            51:   h.Element html() {
        !            52:     if (!simpleUI)
        !            53:       return super.html();
        !            54:     h.DivElement div = new h.DivElement();
        !            55:     div.id = "$id";
        !            56:     div.classes.add('dn');
        !            57:     if (!valid)
        !            58:       div.classes.add('invalid');
        !            59:     div.classes.add('section');
        !            60:     setStyle(div);
        !            61:     DaxeNode dn = firstChild;
        !            62:     while (dn != null) {
        !            63:       h.Element he = dn.html();
        !            64:       if (dn is DNHiddenP && dn.firstChild == null && dn.previousSibling is H1 &&
        !            65:           dn.previousSibling.previousSibling == null && dn.nextSibling == null) {
        !            66:         he.style.position = 'relative';
        !            67:         h.SpanElement span = new h.SpanElement();
        !            68:         span.style.position = 'absolute';
        !            69:         span.style.color = '#CCC';
        !            70:         span.appendText(LCDStrings.get('section_contents'));
        !            71:         he.append(span);
        !            72:       }
        !            73:       div.append(he);
        !            74:       dn = dn.nextSibling;
        !            75:     }
        !            76:     if (lastChild == null || lastChild.nodeType == DaxeNode.TEXT_NODE)
        !            77:       div.appendText('\n');
        !            78:     return(div);
        !            79:   }
        !            80:   
        !            81:   void setupRestrictions() {
        !            82:     for (int i=0; i<attRefs.length; i++) {
        !            83:       x.Element refAttr = attRefs[i];
        !            84:       if (!simpleUIAttributes.contains(doc.cfg.attributeName(refAttr))) {
        !            85:         attRefs.removeAt(i);
        !            86:         i--;
        !            87:       }
        !            88:     }
        !            89:   }
        !            90:   
        !            91:   @override
        !            92:   void setupSimpleUI() {
        !            93:     simpleUI = true;
        !            94:     setupRestrictions();
        !            95:     fixChildrenForSimpleUI();
        !            96:     state = 0;
        !            97:   }
        !            98:   
        !            99:   @override
        !           100:   void newNodeCreationUI(ActionFunction okfct) {
        !           101:     setupSimpleUI();
        !           102:     okfct();
        !           103:   }
        !           104:   
        !           105:   @override
        !           106:   h.Element getHTMLContentsNode() {
        !           107:     if (!simpleUI)
        !           108:       return super.getHTMLContentsNode();
        !           109:     return getHTMLNode();
        !           110:   }
        !           111:   
        !           112:   H1 newH1() {
        !           113:     List<x.Element> h1Refs = doc.cfg.elementReferences('h1');
        !           114:     x.Element h1Ref = doc.cfg.findSubElement(ref, h1Refs);
        !           115:     H1 h1 = NodeFactory.create(h1Ref);
        !           116:     h1.state = 1;
        !           117:     return h1;
        !           118:   }
        !           119:   
        !           120:   /**
        !           121:    * This inserts simpleUI children if missing.
        !           122:    */
        !           123:   void fixChildrenForSimpleUI() {
        !           124:     bool foundH1 = (firstChild is H1 && firstChild.nodeName == 'h1');
        !           125:     if (!foundH1) {
        !           126:       if (firstChild == null)
        !           127:         appendChild(newH1());
        !           128:       else
        !           129:         insertBefore(newH1(), firstChild);
        !           130:     }
        !           131:   }
        !           132:   
        !           133: }