/**
- * @file
- * Manages elements that can offset the size of the viewport.
- *
- * Measures and reports viewport offset dimensions from elements like the
- * toolbar that can potentially displace the positioning of other elements.
- */
-
-/**
- * @typedef {object} Drupal~displaceOffset
- *
- * @prop {number} top
- * @prop {number} left
- * @prop {number} right
- * @prop {number} bottom
- */
-
-/**
- * Triggers when layout of the page changes.
- *
- * This is used to position fixed element on the page during page resize and
- * Toolbar toggling.
- *
- * @event drupalViewportOffsetChange
- */
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
(function ($, Drupal, debounce) {
-
- 'use strict';
-
- /**
- * @name Drupal.displace.offsets
- *
- * @type {Drupal~displaceOffset}
- */
var offsets = {
top: 0,
right: 0,
left: 0
};
- /**
- * Registers a resize handler on the window.
- *
- * @type {Drupal~behavior}
- */
Drupal.behaviors.drupalDisplace = {
- attach: function () {
- // Mark this behavior as processed on the first pass.
+ attach: function attach() {
if (this.displaceProcessed) {
return;
}
}
};
- /**
- * Informs listeners of the current offset dimensions.
- *
- * @function Drupal.displace
- *
- * @prop {Drupal~displaceOffset} offsets
- *
- * @param {bool} [broadcast]
- * When true or undefined, causes the recalculated offsets values to be
- * broadcast to listeners.
- *
- * @return {Drupal~displaceOffset}
- * An object whose keys are the for sides an element -- top, right, bottom
- * and left. The value of each key is the viewport displacement distance for
- * that edge.
- *
- * @fires event:drupalViewportOffsetChange
- */
function displace(broadcast) {
offsets = Drupal.displace.offsets = calculateOffsets();
if (typeof broadcast === 'undefined' || broadcast) {
return offsets;
}
- /**
- * Determines the viewport offsets.
- *
- * @return {Drupal~displaceOffset}
- * An object whose keys are the for sides an element -- top, right, bottom
- * and left. The value of each key is the viewport displacement distance for
- * that edge.
- */
function calculateOffsets() {
return {
top: calculateOffset('top'),
};
}
- /**
- * Gets a specific edge's offset.
- *
- * Any element with the attribute data-offset-{edge} e.g. data-offset-top will
- * be considered in the viewport offset calculations. If the attribute has a
- * numeric value, that value will be used. If no value is provided, one will
- * be calculated using the element's dimensions and placement.
- *
- * @function Drupal.displace.calculateOffset
- *
- * @param {string} edge
- * The name of the edge to calculate. Can be 'top', 'right',
- * 'bottom' or 'left'.
- *
- * @return {number}
- * The viewport displacement distance for the requested edge.
- */
function calculateOffset(edge) {
var edgeOffset = 0;
var displacingElements = document.querySelectorAll('[data-offset-' + edge + ']');
var n = displacingElements.length;
for (var i = 0; i < n; i++) {
var el = displacingElements[i];
- // If the element is not visible, do consider its dimensions.
+
if (el.style.display === 'none') {
continue;
}
- // If the offset data attribute contains a displacing value, use it.
+
var displacement = parseInt(el.getAttribute('data-offset-' + edge), 10);
- // If the element's offset data attribute exits
- // but is not a valid number then get the displacement
- // dimensions directly from the element.
+
if (isNaN(displacement)) {
displacement = getRawOffset(el, edge);
}
- // If the displacement value is larger than the current value for this
- // edge, use the displacement value.
+
edgeOffset = Math.max(edgeOffset, displacement);
}
return edgeOffset;
}
- /**
- * Calculates displacement for element based on its dimensions and placement.
- *
- * @param {HTMLElement} el
- * The jQuery element whose dimensions and placement will be measured.
- *
- * @param {string} edge
- * The name of the edge of the viewport that the element is associated
- * with.
- *
- * @return {number}
- * The viewport displacement distance for the requested edge.
- */
function getRawOffset(el, edge) {
var $el = $(el);
var documentElement = document.documentElement;
var displacement = 0;
- var horizontal = (edge === 'left' || edge === 'right');
- // Get the offset of the element itself.
+ var horizontal = edge === 'left' || edge === 'right';
+
var placement = $el.offset()[horizontal ? 'left' : 'top'];
- // Subtract scroll distance from placement to get the distance
- // to the edge of the viewport.
+
placement -= window['scroll' + (horizontal ? 'X' : 'Y')] || document.documentElement['scroll' + (horizontal ? 'Left' : 'Top')] || 0;
- // Find the displacement value according to the edge.
+
switch (edge) {
- // Left and top elements displace as a sum of their own offset value
- // plus their size.
case 'top':
- // Total displacement is the sum of the elements placement and size.
displacement = placement + $el.outerHeight();
break;
case 'left':
- // Total displacement is the sum of the elements placement and size.
displacement = placement + $el.outerWidth();
break;
- // Right and bottom elements displace according to their left and
- // top offset. Their size isn't important.
case 'bottom':
displacement = documentElement.clientHeight - placement;
break;
return displacement;
}
- /**
- * Assign the displace function to a property of the Drupal global object.
- *
- * @ignore
- */
Drupal.displace = displace;
$.extend(Drupal.displace, {
-
- /**
- * Expose offsets to other scripts to avoid having to recalculate offsets.
- *
- * @ignore
- */
offsets: offsets,
- /**
- * Expose method to compute a single edge offsets.
- *
- * @ignore
- */
calculateOffset: calculateOffset
});
-
-})(jQuery, Drupal, Drupal.debounce);
+})(jQuery, Drupal, Drupal.debounce);
\ No newline at end of file
projects / yaffs-website / blobdiff