/*
This file is part of LON-CAPA.
LON-CAPA is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LON-CAPA 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with LON-CAPA. If not, see <http://www.gnu.org/licenses/>.
*/
// $Id: loncapa_daxe.dart,v 1.56 2024/03/27 16:39:44 raeburn Exp $
library loncapa_daxe;
import 'dart:async';
import 'dart:collection';
import 'dart:html' as h;
import 'dart:math';
import 'package:daxe/daxe.dart';
import 'package:daxe/src/xmldom/xmldom.dart' as x;
import 'package:daxe/src/strings.dart';
import 'package:daxe/src/nodes/nodes.dart' show DNBlock, DNCData, DNFile, DNText,
SimpleTypeControl, ParentUpdatingDNText, DNHiddenP, DNString, DNHiddenDiv;
import 'dart:js' as js;
import 'lcd_strings.dart';
part 'about_lc_daxe_dlg.dart';
part 'lcd_insert_panel.dart';
part 'nodes/lcd_block.dart';
part 'nodes/lcd_block_no_newline.dart';
part 'nodes/lcd_file.dart';
part 'nodes/lcd_parameter.dart';
part 'nodes/tex_mathjax.dart';
part 'nodes/lm.dart';
part 'nodes/chem.dart';
part 'nodes/numerical_response.dart';
part 'nodes/formula_response.dart';
part 'nodes/string_response.dart';
part 'nodes/essay_response.dart';
part 'nodes/textfield.dart';
part 'nodes/radio_response.dart';
part 'nodes/radio_foilgroup.dart';
part 'nodes/radio_foil.dart';
part 'nodes/option_response.dart';
part 'nodes/option_foilgroup.dart';
part 'nodes/option_foil.dart';
part 'nodes/match_response.dart';
part 'nodes/match_foilgroup.dart';
part 'nodes/match_foil.dart';
part 'nodes/itemgroup.dart';
part 'nodes/match_item.dart';
part 'nodes/rank_response.dart';
part 'nodes/rank_foilgroup.dart';
part 'nodes/rank_foil.dart';
part 'nodes/math_response.dart';
part 'nodes/math_answer.dart';
part 'nodes/organic_response.dart';
part 'nodes/jsme_dialog.dart';
part 'nodes/reaction_response.dart';
part 'nodes/textline.dart';
part 'nodes/hintgroup.dart';
part 'nodes/simple_ui_text.dart';
part 'nodes/script_block.dart';
part 'nodes/simple_ui_exception.dart';
part 'nodes/gnuplot.dart';
part 'nodes/organic_structure.dart';
part 'nodes/fake_attribute_element.dart';
part 'nodes/plot_axis.dart';
part 'nodes/plot_curve.dart';
part 'nodes/section.dart';
part 'nodes/h1.dart';
List<String> knownSectionRoles = ['activity', 'advice', 'bibliography', 'citation',
'conclusion', 'definition', 'demonstration', 'example',
'explanation', 'introduction', 'method', 'more_information',
'objectives', 'prerequisites', 'remark', 'reminder',
'summary', 'syntax', 'warning'];
void main() {
NodeFactory.addCoreDisplayTypes();
// LON-CAPA specific display types:
setDisplayType('lcdblock',
(x.Element ref) => new LCDBlock.fromRef(ref),
(x.Node node, DaxeNode parent) => new LCDBlock.fromNode(node, parent)
);
setDisplayType('texmathjax',
(x.Element ref) => new TeXMathJax.fromRef(ref),
(x.Node node, DaxeNode parent) => new TeXMathJax.fromNode(node, parent)
);
setDisplayType('lm',
(x.Element ref) => new Lm.fromRef(ref),
(x.Node node, DaxeNode parent) => new Lm.fromNode(node, parent)
);
setDisplayType('chem',
(x.Element ref) => new Chem.fromRef(ref),
(x.Node node, DaxeNode parent) => new Chem.fromNode(node, parent)
);
setDisplayType('script',
(x.Element ref) => new ScriptBlock.fromRef(ref),
(x.Node node, DaxeNode parent) => new ScriptBlock.fromNode(node, parent)
);
setDisplayType('parameter',
(x.Element ref) => new LCDParameter.fromRef(ref),
(x.Node node, DaxeNode parent) => new LCDParameter.fromNode(node, parent)
);
setDisplayType('numericalresponse',
(x.Element ref) => new NumericalResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new NumericalResponse.fromNode(node, parent)
);
setDisplayType('formularesponse',
(x.Element ref) => new FormulaResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new FormulaResponse.fromNode(node, parent)
);
setDisplayType('stringresponse',
(x.Element ref) => new StringResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new StringResponse.fromNode(node, parent)
);
setDisplayType('essayresponse',
(x.Element ref) => new EssayResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new EssayResponse.fromNode(node, parent)
);
setDisplayType('radioresponse',
(x.Element ref) => new RadioResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new RadioResponse.fromNode(node, parent)
);
setDisplayType('optionresponse',
(x.Element ref) => new OptionResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new OptionResponse.fromNode(node, parent)
);
setDisplayType('matchresponse',
(x.Element ref) => new MatchResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new MatchResponse.fromNode(node, parent)
);
setDisplayType('rankresponse',
(x.Element ref) => new RankResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new RankResponse.fromNode(node, parent)
);
setDisplayType('mathresponse',
(x.Element ref) => new MathResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new MathResponse.fromNode(node, parent)
);
setDisplayType('organicresponse',
(x.Element ref) => new OrganicResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new OrganicResponse.fromNode(node, parent)
);
setDisplayType('reactionresponse',
(x.Element ref) => new ReactionResponse.fromRef(ref),
(x.Node node, DaxeNode parent) => new ReactionResponse.fromNode(node, parent)
);
setDisplayType('foilgroup',
(x.Element ref) {
if (ref.getAttribute('type') == 'radiobuttonresponse--foilgroup')
return new RadioFoilgroup.fromRef(ref);
else if (ref.getAttribute('type') == 'optionresponse--foilgroup')
return new OptionFoilgroup.fromRef(ref);
else if (ref.getAttribute('type') == 'matchresponse--foilgroup')
return new MatchFoilgroup.fromRef(ref);
else if (ref.getAttribute('type') == 'rankresponse--foilgroup')
return new RankFoilgroup.fromRef(ref);
return new LCDBlock.fromRef(ref);
},
(x.Node node, DaxeNode parent) {
if (parent is RadioResponse)
return new RadioFoilgroup.fromNode(node, parent);
else if (parent is OptionResponse)
return new OptionFoilgroup.fromNode(node, parent);
else if (parent is MatchResponse)
return new MatchFoilgroup.fromNode(node, parent);
else if (parent is RankResponse)
return new RankFoilgroup.fromNode(node, parent);
return new LCDBlock.fromNode(node, parent);
}
);
setDisplayType('foil',
(x.Element ref) {
if (ref.getAttribute('type') == 'radiobuttonresponse--foil')
return new RadioFoil.fromRef(ref);
else if (ref.getAttribute('type') == 'optionresponse--foil')
return new OptionFoil.fromRef(ref);
else if (ref.getAttribute('type') == 'matchresponse--foil')
return new MatchFoil.fromRef(ref);
else if (ref.getAttribute('type') == 'rankresponse--foil')
return new RankFoil.fromRef(ref);
return new LCDBlock.fromRef(ref);
},
(x.Node node, DaxeNode parent) {
if (parent is RadioFoilgroup)
return new RadioFoil.fromNode(node, parent);
else if (parent is OptionFoilgroup ||
(parent.parent != null && parent.parent is OptionFoilgroup))
return new OptionFoil.fromNode(node, parent);
else if (parent is MatchFoilgroup ||
(parent.parent != null && parent.parent is MatchFoilgroup))
return new MatchFoil.fromNode(node, parent);
else if (parent is RankFoilgroup)
return new RankFoil.fromNode(node, parent);
return new LCDBlock.fromNode(node, parent);
}
);
setDisplayType('itemgroup',
(x.Element ref) => new Itemgroup.fromRef(ref),
(x.Node node, DaxeNode parent) => new Itemgroup.fromNode(node, parent)
);
setDisplayType('matchitem',
(x.Element ref) => new MatchItem.fromRef(ref),
(x.Node node, DaxeNode parent) => new MatchItem.fromNode(node, parent)
);
setDisplayType('textline',
(x.Element ref) => new Textline.fromRef(ref),
(x.Node node, DaxeNode parent) => new Textline.fromNode(node, parent)
);
setDisplayType('textfield',
(x.Element ref) => new Textfield.fromRef(ref),
(x.Node node, DaxeNode parent) => new Textfield.fromNode(node, parent)
);
setDisplayType('hintgroup',
(x.Element ref) => new Hintgroup.fromRef(ref),
(x.Node node, DaxeNode parent) => new Hintgroup.fromNode(node, parent)
);
setDisplayType('answer',
(x.Element ref) {
if (ref.getAttribute('type') == 'mathresponse--answer')
return new MathAnswer.fromRef(ref);
else if (ref.getAttribute('type') == 'caparesponse--answer')
return new LCDBlock.fromRef(ref);
else
return new ScriptBlock.fromRef(ref);
},
(x.Node node, DaxeNode parent) {
if (parent is MathResponse)
return new MathAnswer.fromNode(node, parent);
else if (parent != null && parent.ref != null &&
parent.ref.getAttribute('type') == 'caparesponse--answergroup')
return new LCDBlock.fromNode(node, parent);
else
return new ScriptBlock.fromNode(node, parent);
}
);
setDisplayType('gnuplot',
(x.Element ref) => new Gnuplot.fromRef(ref),
(x.Node node, DaxeNode parent) => new Gnuplot.fromNode(node, parent)
);
setDisplayType('organicstructure',
(x.Element ref) => new OrganicStructure.fromRef(ref),
(x.Node node, DaxeNode parent) => new OrganicStructure.fromNode(node, parent)
);
setDisplayType('fakeattribute',
(x.Element ref) {
if (doc.cfg.elementName(ref) != 'title' || ref.getAttribute('type') == 'lonplot--title')
return new FakeAttributeElement.fromRef(ref);
return new LCDBlock.fromRef(ref);
},
(x.Node node, DaxeNode parent) {
if (parent is Gnuplot || parent is PlotCurve)
return new FakeAttributeElement.fromNode(node, parent);
return new LCDBlock.fromNode(node, parent);
}
);
setDisplayType('plotaxis',
(x.Element ref) => new PlotAxis.fromRef(ref),
(x.Node node, DaxeNode parent) => new PlotAxis.fromNode(node, parent)
);
setDisplayType('plotcurve',
(x.Element ref) => new PlotCurve.fromRef(ref),
(x.Node node, DaxeNode parent) => new PlotCurve.fromNode(node, parent)
);
setDisplayType('section',
(x.Element ref) => new Section.fromRef(ref),
(x.Node node, DaxeNode parent) => new Section.fromNode(node, parent)
);
setDisplayType('h1',
(x.Element ref) => new H1.fromRef(ref),
(x.Node node, DaxeNode parent) => new H1.fromNode(node, parent)
);
setDisplayType('lcdblocknonewline',
(x.Element ref) => new LCDBlockNoNewline.fromRef(ref),
(x.Node node, DaxeNode parent) => new LCDBlockNoNewline.fromNode(node, parent)
);
setDisplayType('label',
(x.Element ref) {
if (ref.getAttribute('type') == 'lonplot--label')
return new LCDBlockNoNewline.fromRef(ref); // gnuplot label
else if (ref.getAttribute('type') == 'randomlabel--label')
return new LCDBlockNoNewline.fromRef(ref); // randomlabel label
return new DNString.fromRef(ref); // HTML form label
},
(x.Node node, DaxeNode parent) {
if (parent is Gnuplot || (parent != null && parent.parent is Gnuplot))
return new LCDBlockNoNewline.fromNode(node, parent);
else if (parent != null && parent.ref != null &&
parent.ref.getAttribute('type') == 'randomlabel--labelgroup')
return new LCDBlockNoNewline.fromNode(node, parent);
return new DNString.fromNode(node, parent);
}
);
setDisplayType('lcdfile',
(x.Element ref) => new LCDFile.fromRef(ref),
(x.Node node, DaxeNode parent) => new LCDFile.fromNode(node, parent)
);
setDisplayType('hiddendiv',
(x.Element ref) => new DNHiddenDiv.fromRef(ref),
(x.Node node, DaxeNode parent) {
// use DNBlock if it is going to be visible
// (otherwise display is like division, with tags)
if (node is x.Element && node.getAttribute('style') != '')
return new DNHiddenDiv.fromNode(node, parent);
else
return new DNBlock.fromNode(node, parent);
}
);
// Initialize Daxe, using daxe.initDaxe as a basis.
// The insertion panel is customized.
InsertPanel insertP = new LCDInsertPanel();
LeftPanel left = new LeftPanel(insert:insertP);
// The save action is customized.
ActionFunction saveFunction= () {
doc.save().then((_) {
// h.window.alert(Strings.get('save.success'));
// update the preview iframe
h.IFrameElement previewIFrame = h.document.getElementById('preview_iframe');
if (previewIFrame != null) {
h.FormElement form = h.document.getElementById('preview_form');
form.submit();
}
}, onError: (DaxeException ex) {
h.window.alert(Strings.get('save.error') + ': ' + ex.message);
});
};
// function to customize the toobar after its default creation
ActionFunction customizeToolbar = () {
ToolbarMenu sectionMenu = _makeSectionMenu();
Toolbar toolbar = page.toolbar;
if (sectionMenu != null)
toolbar.add(sectionMenu);
int fileBoxIndex;
ToolbarBox mathBox;
if (doc.saveURL != null) {
fileBoxIndex = 4;
mathBox = toolbar.items[4];
} else {
fileBoxIndex = 3;
mathBox = toolbar.items[3];
}
List<x.Element> refs = doc.cfg.elementsWithType('lcdfile');
if (refs != null && refs.length > 0) {
ToolbarBox fileBox = new ToolbarBox();
toolbar.addInsertButton(doc.cfg, fileBox, refs, Toolbar.iconPath + 'insert_image.png');
toolbar.items.insert(fileBoxIndex, fileBox);
}
x.Element texRef = doc.cfg.elementReference('m');
if (texRef != null) {
ToolbarButton texButton = new ToolbarButton(
LCDStrings.get('insert_m'), 'images/tex.png',
() => doc.insertNewNode(texRef, 'element'), Toolbar.insertButtonUpdate,
data:new ToolbarStyleInfo([texRef], null, null));
mathBox.add(texButton);
}
x.Element lmRef = doc.cfg.elementReference('lm');
if (lmRef != null) {
ToolbarButton lmButton = new ToolbarButton(
LCDStrings.get('insert_lm'), 'packages/daxe/images/toolbar/equation.png',
() => doc.insertNewNode(lmRef, 'element'), Toolbar.insertButtonUpdate,
data:new ToolbarStyleInfo([lmRef], null, null));
mathBox.add(lmButton);
}
};
// Initialization
Future.wait([Strings.load(), LCDStrings.load(), _readTemplates('templates.xml')]).then((List responses) {
initDaxe(left:left, saveFunction:saveFunction,
customizeToolbar:customizeToolbar).then((v) {
// More customizations
_addGuttersAndPreview();
page.adjustPositionsUnderToolbar();
page.updateAfterPathChange();
// add things to the menubar
if (responses[2] is x.Document) {
// at this point the menubar html is already in the document, so we have to fix the HTML
h.Element menubarDiv = h.document.getElementsByClassName('menubar')[0];
Menu m = _makeTemplatesMenu(responses[2]);
if (m != null) {
page.mbar.add(m);
menubarDiv.append(page.mbar.createMenuDiv(m));
}
Menu helpMenu = _makeHelpMenu();
page.mbar.add(helpMenu);
menubarDiv.append(page.mbar.createMenuDiv(helpMenu));
page.updateAfterPathChange();
} else
print("Error reading templates file, could not build the menu.");
}).catchError((e) {
String msg = 'Initialization error: ' + (e is String ? e : e.toString());
print(msg);
h.document.body.appendText(msg);
});
}).catchError((e) {
String msg = 'Initialization error: ' + (e is String ? e : e.toString());
print(msg);
h.document.body.appendText(msg);
});
/**
* Supports buttons in parent window used to save a LON_CAPA problem file in iframe,
* followed either by exiting Daxe editor (with display of the problem) or by
* continued editing in Daxe editor (with update of problem in preview panel).
*/
String savelcdoc(String next) {
doc.save().then((_) {
if (next == 'exit') {
String msgtarget = h.window.location.protocol+'//'+h.window.location.hostname;
h.window.parent.postMessage(doc.filePath,msgtarget);
} else {
h.IFrameElement previewIFrame = h.document.getElementById('preview_iframe');
if (previewIFrame != null) {
h.FormElement form = h.document.getElementById('preview_form');
form.submit();
}
}
}, onError: (DaxeException ex) {
h.window.alert(Strings.get('save.error') + ': ' + ex.message);
});
}
js.context['savelcdoc'] = savelcdoc;
}
/**
* Adds a movable left gutter between the left panel and the document,
* a preview to the right and another gutter beween the document and the preview.
* Also hides the left panel initially.
*/
void _addGuttersAndPreview() {
// NOTE: The preview is in an iframe within Daxe
// (so that it works like another LON-CAPA problem preview),
// and Daxe itself is in an iframe (so as to get the parameters from the URL).
// This makes handling mouse event a little more complicated: the preview iframe
// will consume events by default, and events outside the Daxe iframe are not
// always sent to the iframe when happening outside.
bool moving_left_gutter = false;
bool moving_right_gutter = false;
// hide left panel
h.Element left = h.document.getElementById('left_panel');
left.style.width ='0px';
left.style.visibility = 'hidden';
// add left gutter
h.DivElement leftGutter = new h.DivElement();
leftGutter.id = 'left_gutter';
leftGutter.classes.add('vertical-gutter');
leftGutter.style.left ='0px';
h.Element doc1 = h.document.getElementById('doc1');
h.document.body.insertBefore(leftGutter, doc1);
doc1.style.left = '10px';
// preview and right gutter
h.DivElement previewDiv;
h.IFrameElement previewIFrame;
if (doc.filePath != null && doc.filePath.startsWith('/daxeopen')) {
previewDiv = new h.DivElement();
previewDiv.id = 'preview_div';
h.FormElement form = new h.FormElement();
form.id = 'preview_form';
form.action = doc.filePath.substring(9);
form.target = 'preview_iframe';
form.method = 'post';
h.InputElement inhibitmenuInput = new h.InputElement();
inhibitmenuInput.name = 'inhibitmenu';
inhibitmenuInput.value = 'yes';
inhibitmenuInput.hidden = true;
form.append(inhibitmenuInput);
Random rng = new Random();
int rndseed = rng.nextInt(2100000000); // max as in Perl code
var rndseedInput = new h.InputElement();
rndseedInput.name = 'rndseed';
rndseedInput.value = rndseed.toString();
rndseedInput.hidden = true;
form.append(rndseedInput);
var resetButton = new h.ButtonElement();
resetButton.name = 'resetdata';
resetButton.type = 'submit';
resetButton.value = 'reset_submissions';
resetButton.appendText(LCDStrings.get('reset_submissions'));
form.append(resetButton);
form.appendText(' ');
var randomizationButton = new h.ButtonElement();
randomizationButton.appendText(LCDStrings.get('new_randomization'));
randomizationButton.onClick.listen((e) {
rndseed = rng.nextInt(2100000000);
rndseedInput.value = rndseed.toString();
form.submit();
e.preventDefault();
});
form.append(randomizationButton);
previewDiv.append(form);
previewDiv.append(new h.HRElement());
previewIFrame = new h.IFrameElement();
previewIFrame.id = 'preview_iframe';
previewIFrame.name = 'preview_iframe';
previewIFrame.onLoad.listen((e) {
// set rndseed in the iframe form
// dart does not allow iframe crossing, we have to use dart:js for everything
// see https://github.com/dart-lang/sdk/issues/20146
// and http://stackoverflow.com/q/28940617/438970
var iframe = new js.JsObject.fromBrowserObject(
h.document.getElementById('preview_iframe'));
var doc = new js.JsObject.fromBrowserObject(iframe['contentDocument']);
var forms = doc['forms'];
var lonhomework = forms['lonhomework'];
if (lonhomework == null)
return;
var iFrameForm = new js.JsObject.fromBrowserObject(lonhomework);
var input = new js.JsObject.fromBrowserObject(
doc.callMethod('createElement',['input']));
input['name'] = 'rndseed';
input['value'] = rndseed.toString();
input['type'] = 'hidden';
iFrameForm.callMethod('appendChild', [input]);
});
int previewWidth = (doc1.offsetWidth / 3).round();
previewDiv.style.width = "${previewWidth}px";
previewDiv.append(previewIFrame);
h.DivElement rightGutter = new h.DivElement();
rightGutter.id = 'right_gutter';
rightGutter.classes.add('vertical-gutter');
rightGutter.style.right = "${previewWidth}px";
var right_mousedown = (h.Event event) {
moving_right_gutter = true;
event.preventDefault();
previewIFrame.style.pointerEvents = 'none';
};
rightGutter.onMouseDown.listen(right_mousedown);
rightGutter.onTouchStart.listen(right_mousedown);
h.document.body.append(rightGutter);
doc1.style.right = "${previewWidth + 10}px";
h.document.body.append(previewDiv);
form.submit(); // fills the iframe
}
// mousedown on left gutter
var left_mousedown = (h.Event event) {
moving_left_gutter = true;
event.preventDefault();
if (h.document.activeElement != null && h.document.activeElement != h.document.body)
h.document.activeElement.blur(); // this will hide the cursor if visible
if (previewIFrame != null)
previewIFrame.style.pointerEvents = 'none';
};
leftGutter.onMouseDown.listen(left_mousedown);
leftGutter.onTouchStart.listen(left_mousedown);
// adjust top positions when the toolbar height changes
_adjustPositionsUnderToolbar();
h.window.onResize.listen((h.Event event) => _adjustPositionsUnderToolbar());
// mousemove for both gutters
var mousemove = (h.Event event) {
if (!(moving_left_gutter || moving_right_gutter))
return;
h.Element left = h.document.getElementById('left_panel');
h.Element doc1 = h.document.getElementById('doc1');
num x;
if (event is h.MouseEvent)
x = event.client.x;
else if (event is h.TouchEvent)
x = event.changedTouches[0].client.x;
else
return;
x = x.round();
// for IE, temporary change of overflow for doc1,
// otherwise IE and Edge never report an empty width when there is a scrollbar
// (this slows things down, so it is done only for IE)
bool ie = h.window.navigator.appVersion.contains("Trident") || h.window.navigator.appVersion.contains("Edge");
if (ie)
doc1.style.overflow = 'hidden';
num doc1width = doc1.offsetWidth;
if (ie)
doc1.style.overflow = '';
if (moving_left_gutter) {
h.Element leftGutter = h.document.getElementById('left_gutter');
if (x < 5)
x = 5;
int maxX = left.offsetWidth + 5 + doc1width;
if (x > maxX)
x = maxX;
if (x == 5)
left.style.visibility = 'hidden';
else
left.style.visibility = '';
left.style.width = "${x-5}px";
leftGutter.style.left ="${x-5}px";
if (x == maxX)
doc1.style.visibility = 'hidden';
else
doc1.style.visibility = '';
doc1.style.left ="${x+5}px";
} else if (moving_right_gutter) {
h.Element previewDiv = h.document.getElementById('preview_div');
h.Element rightGutter = h.document.getElementById('right_gutter');
int minX = left.offsetWidth + 10 + 5;
if (x < minX)
x = minX;
int maxX = left.offsetWidth + 10 + doc1width + 5 + previewDiv.offsetWidth;
if (x > maxX)
x = maxX;
int previewWidth = maxX - x;
if (previewWidth == 0)
previewDiv.style.visibility = 'hidden';
else
previewDiv.style.visibility = '';
previewDiv.style.width = "${previewWidth}px";
rightGutter.style.right ="${previewWidth}px";
if (x == minX)
doc1.style.visibility = 'hidden';
else
doc1.style.visibility = '';
doc1.style.right ="${previewWidth + 10}px";
_adjustPreviewIFrameHeight();
}
event.stopPropagation();
event.preventDefault();
};
h.document.onMouseMove.listen(mousemove);
h.document.onTouchMove.listen(mousemove);
// mouseup
var mouseup = (h.Event event) {
if (moving_left_gutter || moving_right_gutter) {
event.preventDefault();
h.IFrameElement previewIFrame = h.document.getElementById('preview_iframe');
if (previewIFrame != null) {
// restore events on iframe
previewIFrame.style.pointerEvents = '';
}
moving_left_gutter = false;
moving_right_gutter = false;
}
};
h.document.onMouseUp.listen(mouseup);
h.document.onTouchEnd.listen(mouseup);
// if we are in an iframe, we need to use the parent to get
// mouseup events outside it with some browsers like Chromium
var parent = new js.JsObject.fromBrowserObject(js.context['window'])['parent'];
if (parent is h.Window) {
// happens with Dartium and Firefox
parent.onMouseUp.listen((h.MouseEvent event) => mouseup(event));
} else if (parent is js.JsObject) {
// happens with Chromium
parent.callMethod('addEventListener', ['mouseup', mouseup, false]);
}
}
/*
* This complements WebPage.adjustPositionsUnderToolbar with positions for the gutters and preview.
*/
void _adjustPositionsUnderToolbar() {
h.Element headers = h.document.getElementById('headers');
num y = headers.getBoundingClientRect().bottom;
String cssTop = (y.round() + 2).toString() + "px";
h.document.getElementById('left_gutter').style.top = cssTop;
h.DivElement rightGutter = h.document.getElementById('right_gutter');
if (rightGutter != null)
rightGutter.style.top = cssTop;
h.DivElement previewDiv = h.document.getElementById('preview_div');
if (previewDiv != null)
previewDiv.style.top = cssTop;
_adjustPreviewIFrameHeight();
}
/*
* Fixes the preview iframe height to take form on top into account
* (this cannot be done with pure CSS without flexbox).
*/
void _adjustPreviewIFrameHeight() {
h.DivElement previewDiv = h.document.getElementById('preview_div');
if (previewDiv != null) {
h.IFrameElement previewIFrame = h.document.getElementById('preview_iframe');
int newHeight = previewDiv.offsetHeight - previewIFrame.offsetTop;
previewIFrame.style.height = newHeight.toString() + 'px';
}
}
ToolbarMenu _makeSectionMenu() {
// sort section roles by title
knownSectionRoles.sort((String role1, String role2) => LCDStrings.get(role1).compareTo(LCDStrings.get(role2)));
Menu menu = new Menu(LCDStrings.get('Section'));
List<x.Element> sectionRefs = doc.cfg.elementReferences('section');
if (sectionRefs == null || sectionRefs.length == 0)
return(null);
x.Element h1Ref = doc.cfg.elementReference('h1');
for (String role in knownSectionRoles) {
MenuItem menuItem = new MenuItem(LCDStrings.get(role), null,
data:new ToolbarStyleInfo(sectionRefs, null, null));
menuItem.action = () {
ToolbarStyleInfo info = menuItem.data;
x.Element sectionRef = info.validRef;
Section section = new Section.fromRef(sectionRef);
section.state = 1;
section.setAttribute('class', 'role-' + role);
H1 h1 = NodeFactory.create(h1Ref);
h1.state = 1;
h1.appendChild(new DNText(LCDStrings.get(role)));
section.appendChild(h1);
x.Element hiddenp = doc.cfg.findSubElement(sectionRef, doc.hiddenParaRefs);
DNHiddenP p = new DNHiddenP.fromRef(hiddenp);
section.appendChild(p);
section.setupSimpleUI();
if (doc.insert2(section, page.getSelectionStart())) {
page.cursor.moveTo(new Position(p, 0));
page.updateAfterPathChange();
}
};
menu.add(menuItem);
}
ToolbarMenu tbmenu = new ToolbarMenu(menu, Toolbar.insertMenuUpdate, page.toolbar);
return(tbmenu);
}
Future<x.Document> _readTemplates(String templatesPath) {
x.DOMParser dp = new x.DOMParser();
return(dp.parseFromURL(templatesPath));
}
Menu _makeTemplatesMenu(x.Document templatesDoc) {
List<x.Element> problemRefs = doc.cfg.elementReferences('problem');
if (problemRefs == null || problemRefs.length == 0)
return(null);
Menu menu = new Menu(LCDStrings.get('Templates'));
x.Element templates = templatesDoc.documentElement;
for (x.Node child in templates.childNodes) {
if (child.nodeType == x.Node.ELEMENT_NODE && child.nodeName == 'menu') {
menu.add(_makeMenu(child));
}
}
return(menu);
}
Menu _makeMenu(x.Element el) {
String locale = LCDStrings.systemLocale;
String defaultLocale = LCDStrings.defaultLocale;
String title;
for (x.Node child in el.childNodes) {
if (child.nodeType == x.Node.ELEMENT_NODE && child.nodeName == 'title') {
if (child.firstChild != null && child.firstChild.nodeType == x.Node.TEXT_NODE) {
if ((child as x.Element).getAttribute('lang') == locale) {
title = child.firstChild.nodeValue;
break;
} else if ((child as x.Element).getAttribute('lang') == defaultLocale) {
title = child.firstChild.nodeValue;
}
}
}
}
if (title == null)
title = '?';
Menu menu = new Menu(title);
for (x.Node child in el.childNodes) {
if (child.nodeType == x.Node.ELEMENT_NODE) {
if (child.nodeName == 'menu') {
menu.add(_makeMenu(child));
} else if (child.nodeName == 'item') {
menu.add(_makeItem(child));
}
}
}
return(menu);
}
MenuItem _makeItem(x.Element item) {
String locale = LCDStrings.systemLocale;
String defaultLocale = LCDStrings.defaultLocale;
String path, type, title, help;
for (x.Node child in item.childNodes) {
if (child.nodeType == x.Node.ELEMENT_NODE) {
if (child.nodeName == 'title') {
if (child.firstChild != null && child.firstChild.nodeType == x.Node.TEXT_NODE) {
if ((child as x.Element).getAttribute('lang') == locale) {
title = child.firstChild.nodeValue;
} else if (title == null && (child as x.Element).getAttribute('lang') == defaultLocale) {
title = child.firstChild.nodeValue;
}
}
} else if (child.nodeName == 'path' && child.firstChild != null && child.firstChild.nodeType == x.Node.TEXT_NODE) {
path = child.firstChild.nodeValue;
} else if (child.nodeName == 'type' && child.firstChild != null && child.firstChild.nodeType == x.Node.TEXT_NODE) {
type = child.firstChild.nodeValue;
} else if (child.nodeName == 'help') {
if (child.firstChild != null && child.firstChild.nodeType == x.Node.TEXT_NODE) {
if ((child as x.Element).getAttribute('lang') == locale) {
help = child.firstChild.nodeValue;
} else if (help == null && (child as x.Element).getAttribute('lang') == defaultLocale) {
help = child.firstChild.nodeValue;
}
}
}
}
}
if (type == null) {
print("Warning: missing type for template $title\n");
type = 'problem';
}
x.Element refElement = doc.cfg.elementReference(type);
MenuItem menuItem = new MenuItem(title, () => _insertTemplate(path), data: refElement);
if (help != null)
menuItem.toolTipText = help;
return menuItem;
}
void _insertTemplate(String filePath) {
try {
x.DOMParser dp = new x.DOMParser();
dp.parseFromURL(filePath).then((x.Document templateDoc) {
x.Element root = templateDoc.documentElement;
if (root == null)
return;
doc.removeWhitespace(root);
DaxeNode dnRoot = NodeFactory.createFromNode(root, null);
List<x.Element> rootAttributes = doc.cfg.elementAttributes(dnRoot.ref);
if (dnRoot is LCDBlock && rootAttributes != null && rootAttributes.length > 0)
dnRoot.state = 0; // make attributes editable for the template root
UndoableEdit edit;
Position pos = page.getSelectionStart();
if (dnRoot.nodeName == 'loncapa' && doc.getRootElement() != null)
edit = doc.insertChildrenEdit(dnRoot, pos, checkValidity:true);
else {
DaxeNode parent = pos.dn;
if (parent is DNText)
parent = parent.parent;
if (parent is DNHiddenP && !doc.cfg.isSubElement(parent.ref, dnRoot.ref)) {
// The node must be inserted outside of the paragraph.
// If there is something in the paragraph to the right of the cursor, it must be
// moved into a new paragraph after the inserted node.
// (as in DaxeDocument.insert2)
DNHiddenP p = parent;
edit = new UndoableEdit.compound(Strings.get('undo.insert_element'));
Position pend = new Position(p, p.offsetLength);
pend.moveInsideTextNodeIfPossible();
if (pos < pend) {
DaxeNode clone = doc.cloneBetween(pos, pend);
edit.addSubEdit(doc.removeBetweenEdit(pos, pend));
DNHiddenP newp = NodeFactory.create(p.ref);
edit.addSubEdit(new UndoableEdit.insertNode(
new Position(p.parent, p.parent.offsetOf(p) + 1), newp));
edit.addSubEdit(doc.insertChildrenEdit(clone, new Position(newp, 0)));
}
edit.addSubEdit(new UndoableEdit.insertNode(
new Position(p.parent, p.parent.offsetOf(p)+1), dnRoot));
} else
edit = new UndoableEdit.insertNode(pos, dnRoot);
}
doc.doNewEdit(edit);
page.updateAfterPathChange();
if (dnRoot.nodeName != 'loncapa')
page.scrollToNode(dnRoot);
});
} on x.DOMException catch(ex) {
h.window.alert(ex.toString());
}
}
Menu _makeHelpMenu() {
Menu menu = new Menu(LCDStrings.get('help'));
menu.add(new MenuItem(LCDStrings.get('getting_started'),
() => h.window.open('/adm/help/Authoring_Daxe_Introduction,Authoring_Daxe_Menus,Authoring_Daxe_UI,Authoring_Daxe_Toolbar,Authoring_Daxe_Left_Panel,Authoring_Daxe_Templates,Authoring_Daxe_CSS,Authoring_Daxe_Radiobuttonresponse,Authoring_Daxe_Variables.hlp', '_blank')));
menu.add(new MenuItem(LCDStrings.get('daxe_faq'),
() => h.window.open('/adm/help/Authoring_Daxe_FAQ.hlp', '_blank')));
menu.add(new MenuItem(LCDStrings.get('daxe_math'),
() => h.window.open('/adm/help/Authoring_Daxe_Math.hlp', '_blank')));
menu.add(new MenuItem(LCDStrings.get('author_manual'),
() => h.window.open('/adm/help/author.manual.pdf', '_blank')));
menu.add(new MenuItem(LCDStrings.get('about_lcdaxe'),
() => (new AboutLCDaxeDlg()).show()));
return(menu);
}
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