mirrored from git://git.moodle.org/moodle.git
/
moodle-core-formchangechecker-coverage.js
287 lines (256 loc) · 22.2 KB
/
moodle-core-formchangechecker-coverage.js
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YUI.add('moodle-core-formchangechecker', function (Y, NAME) {
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var FORMCHANGECHECKERNAME = 'core-formchangechecker',
FORMCHANGECHECKER = function() {
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FORMCHANGECHECKER.superclass.constructor.apply(this, arguments);
};
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Y.extend(FORMCHANGECHECKER, Y.Base, {
// The delegated listeners we need to detach after the initial value has been stored once
initialvaluelisteners : [],
/**
* Initialize the module
*/
initializer : function() {
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var formid = 'form#' + this.get('formid'),
currentform = Y.one(formid);
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if (!currentform) {
// If the form was not found, then we can't check for changes.
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return;
}
// Add change events to the form elements
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currentform.delegate('change', M.core_formchangechecker.set_form_changed, 'input', this);
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currentform.delegate('change', M.core_formchangechecker.set_form_changed, 'textarea', this);
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currentform.delegate('change', M.core_formchangechecker.set_form_changed, 'select', this);
// Add a focus event to check for changes which are made without triggering a change event
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this.initialvaluelisteners.push(currentform.delegate('focus', this.store_initial_value, 'input', this));
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this.initialvaluelisteners.push(currentform.delegate('focus', this.store_initial_value, 'textarea', this));
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this.initialvaluelisteners.push(currentform.delegate('focus', this.store_initial_value, 'select', this));
// We need any submit buttons on the form to set the submitted flag
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 37);
Y.one(formid).on('submit', M.core_formchangechecker.set_form_submitted, this);
// YUI doesn't support onbeforeunload properly so we must use the DOM to set the onbeforeunload. As
// a result, the has_changed must stay in the DOM too
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 41);
window.onbeforeunload = M.core_formchangechecker.report_form_dirty_state;
},
/**
* Store the initial value of the currently focussed element
*
* If an element has been focussed and changed but not yet blurred, the on change
* event won't be fired. We need to store it's initial value to compare it in the
* get_form_dirty_state function later.
*/
store_initial_value : function(e) {
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var thisevent;
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if (e.target.hasClass('ignoredirty')) {
// Don't warn on elements with the ignoredirty class
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return;
}
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 57);
if (M.core_formchangechecker.get_form_dirty_state()) {
// Detach all listen events to prevent duplicate initial value setting
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while (this.initialvaluelisteners.length) {
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thisevent = this.initialvaluelisteners.shift();
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thisevent.detach();
}
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return;
}
// Make a note of the current element so that it can be interrogated and
// compared in the get_form_dirty_state function
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M.core_formchangechecker.stateinformation.focused_element = {
element : e.target,
initial_value : e.target.get('value')
};
}
},
{
NAME : FORMCHANGECHECKERNAME,
ATTRS : {
formid : {
'value' : ''
}
}
}
);
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M.core_formchangechecker = M.core_formchangechecker || {};
// We might have multiple instances of the form change protector
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M.core_formchangechecker.instances = M.core_formchangechecker.instances || [];
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M.core_formchangechecker.init = function(config) {
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var formchangechecker = new FORMCHANGECHECKER(config);
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M.core_formchangechecker.instances.push(formchangechecker);
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return formchangechecker;
};
// Store state information
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M.core_formchangechecker.stateinformation = [];
/**
* Set the form changed state to true
*/
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M.core_formchangechecker.set_form_changed = function(e) {
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if (e && e.target && e.target.hasClass('ignoredirty')) {
// Don't warn on elements with the ignoredirty class
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return;
}
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M.core_formchangechecker.stateinformation.formchanged = 1;
// Once the form has been marked as dirty, we no longer need to keep track of form elements
// which haven't yet blurred
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delete M.core_formchangechecker.stateinformation.focused_element;
};
/**
* Set the form submitted state to true
*/
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M.core_formchangechecker.set_form_submitted = function() {
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M.core_formchangechecker.stateinformation.formsubmitted = 1;
};
/**
* Attempt to determine whether the form has been modified in any way and
* is thus 'dirty'
*
* @return Integer 1 is the form is dirty; 0 if not
*/
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M.core_formchangechecker.get_form_dirty_state = function() {
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var state = M.core_formchangechecker.stateinformation,
editor;
// If the form was submitted, then return a non-dirty state
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if (state.formsubmitted) {
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return 0;
}
// If any fields have been marked dirty, return a dirty state
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 136);
if (state.formchanged) {
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return 1;
}
// If a field has been focused and changed, but still has focus then the browser won't fire the
// onChange event. We check for this eventuality here
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 142);
if (state.focused_element) {
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if (state.focused_element.element.get('value') !== state.focused_element.initial_value) {
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return 1;
}
}
// Handle TinyMCE editor instances
// We can't add a listener in the initializer as the editors may not have been created by that point
// so we do so here instead
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if (typeof tinyMCE !== 'undefined') {
_yuitest_coverline("build/moodle-core-formchangechecker/moodle-core-formchangechecker.js", 152);
for (editor in tinyMCE.editors) {
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if (tinyMCE.editors[editor].isDirty()) {
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return 1;
}
}
}
// If we reached here, then the form hasn't met any of the dirty conditions
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return 0;
};
/**
* Return a suitable message if changes have been made to a form
*/
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M.core_formchangechecker.report_form_dirty_state = function(e) {
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if (!M.core_formchangechecker.get_form_dirty_state()) {
// the form is not dirty, so don't display any message
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return;
}
// This is the error message that we'll show to browsers which support it
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var warningmessage = M.util.get_string('changesmadereallygoaway', 'moodle');
// Most browsers are happy with the returnValue being set on the event
// But some browsers do not consistently pass the event
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if (e) {
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e.returnValue = warningmessage;
}
// But some require it to be returned instead
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return warningmessage;
};
}, '@VERSION@', {"requires": ["base", "event-focus"]});