mediawiki-extensions-Visual.../modules/ve/ve.Element.js

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/*!
* VisualEditor UserInterface Element class.
*
* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
/**
* Creates an ve.Element object.
*
* @class
* @abstract
*
* @constructor
* @param {Object} [config] Config options
* @cfg {Function} [$$] jQuery for the frame the widget is in
*/
ve.Element = function VeElement( config ) {
// Initialize config
config = config || {};
// Properties
this.$$ = config.$$ || ve.Element.get$$( document );
this.$ = this.$$( this.$$.context.createElement( this.getTagName() ) );
};
/* Static Properties */
/**
* @static
* @property
* @inheritable
*/
ve.Element.static = {};
/**
* HTML tag name.
*
* This may be ignored if getTagName is overridden.
*
* @static
* @property {string}
* @inheritable
*/
ve.Element.static.tagName = 'div';
/* Static Methods */
/**
* Gets a jQuery function within a specific document.
*
* @static
* @param {jQuery|HTMLElement|HTMLDocument|Window} context Context to bind the function to
* @param {ve.ui.Frame} [frame] Frame of the document context
* @returns {Function} Bound jQuery function
*/
ve.Element.get$$ = function ( context, frame ) {
function wrapper( selector ) {
return $( selector, wrapper.context );
}
wrapper.context = this.getDocument( context );
if ( frame ) {
wrapper.frame = frame;
}
return wrapper;
};
/**
* Get the document of an element.
*
* @static
* @param {jQuery|HTMLElement|HTMLDocument|Window} context Context to bind the function to
* @returns {HTMLDocument} Document object
* @throws {Error} If context is invalid
*/
ve.Element.getDocument = function ( context ) {
var doc =
// jQuery - selections created "offscreen" won't have a context, so .context isn't reliable
( context[0] && context[0].ownerDocument ) ||
// Empty jQuery selections might have a context
context.context ||
// HTMLElement
context.ownerDocument ||
// Window
context.document ||
// HTMLDocument
( context.nodeType === 9 && context );
if ( doc ) {
return doc;
}
throw new Error( 'Invalid context' );
};
/**
* Get the window of an element or document.
*
* @static
* @param {jQuery|HTMLElement|HTMLDocument|Window} context Context to bind the function to
* @returns {Window} Window object
*/
ve.Element.getWindow = function ( context ) {
var doc = this.getDocument( context );
return doc.parentWindow || doc.defaultView;
};
The Great ve.ui.Surface refactor of 2013 Prologue: Farewell ve.Editor my good chap… Oh, hey there HTML frames - I didn't see you there! In a world where iframes are outlaws, and symbols like document and window are global, there were more than a few assumptions about which document or window was being used. But fear not - for this commit (probably) tracks them all down, leaving a trail of iframe-compatible awesomeness in its wake. With the great ve.ui.Surface now able to be used inside of iframes, let the reference editing commence. But there, lurking in the darkness is a DM issue so fierce it may take Roan and/or Ed up to 3 whole hours to sort it out. Note to Roan and/or Ed: Editing references seems to work fine, but when saving the page there are "no changes" which is a reasonable indication to the contrary. Objectives: * Make it possible to have multiple surfaces be instantiated, get along nicely, and be embedded inside of iframes if needed. * Make reference content editable within a dialog Approach: * Move what's left of ve.Editor to ve.ui.Surface and essentially obliterate all use of it * Make even more stuff inherit from ve.Element (long live this.$$) * Use the correct document or window anywhere it was being assumed to be the top level one * Resolve stacking order issues by removing the excessive use of z-index and introducing global and local overlay elements for each editor * Add a surface to the reference dialog, load up the reference contents and save them back on apply * Actually destroy what we create in ce and ui surfaces * Add recursive frame offset calculation method to ve.Element * Moved ve.ce.Surface's getSelectionRect method to the prototype Bonus: * Move ve.ce.DocumentNode.css contents to ve.ce.Node.css (not sure why it was separate in the first place, but I'm likely the one to blame) * Fix blatant lies in documentation * Whitespace cleanup here and there * Get rid of ve.ui.Window overlays - not used or needed Change-Id: Iede83e7d24f7cb249b6ba3dc45d770445b862e08
2013-05-20 22:45:50 +00:00
/**
* Get the offset between two frames.
*
* TODO: Make this function not use recursion.
*
* @static
The Great ve.ui.Surface refactor of 2013 Prologue: Farewell ve.Editor my good chap… Oh, hey there HTML frames - I didn't see you there! In a world where iframes are outlaws, and symbols like document and window are global, there were more than a few assumptions about which document or window was being used. But fear not - for this commit (probably) tracks them all down, leaving a trail of iframe-compatible awesomeness in its wake. With the great ve.ui.Surface now able to be used inside of iframes, let the reference editing commence. But there, lurking in the darkness is a DM issue so fierce it may take Roan and/or Ed up to 3 whole hours to sort it out. Note to Roan and/or Ed: Editing references seems to work fine, but when saving the page there are "no changes" which is a reasonable indication to the contrary. Objectives: * Make it possible to have multiple surfaces be instantiated, get along nicely, and be embedded inside of iframes if needed. * Make reference content editable within a dialog Approach: * Move what's left of ve.Editor to ve.ui.Surface and essentially obliterate all use of it * Make even more stuff inherit from ve.Element (long live this.$$) * Use the correct document or window anywhere it was being assumed to be the top level one * Resolve stacking order issues by removing the excessive use of z-index and introducing global and local overlay elements for each editor * Add a surface to the reference dialog, load up the reference contents and save them back on apply * Actually destroy what we create in ce and ui surfaces * Add recursive frame offset calculation method to ve.Element * Moved ve.ce.Surface's getSelectionRect method to the prototype Bonus: * Move ve.ce.DocumentNode.css contents to ve.ce.Node.css (not sure why it was separate in the first place, but I'm likely the one to blame) * Fix blatant lies in documentation * Whitespace cleanup here and there * Get rid of ve.ui.Window overlays - not used or needed Change-Id: Iede83e7d24f7cb249b6ba3dc45d770445b862e08
2013-05-20 22:45:50 +00:00
* @param {Window} from Window of the child frame
* @param {Window} [to=window] Window of the parent frame
* @param {Object} [offset] Offset to start with, used internally
* @returns {Object} Offset object, containing left and top properties
*/
ve.Element.getFrameOffset = function ( from, to, offset ) {
The Great ve.ui.Surface refactor of 2013 Prologue: Farewell ve.Editor my good chap… Oh, hey there HTML frames - I didn't see you there! In a world where iframes are outlaws, and symbols like document and window are global, there were more than a few assumptions about which document or window was being used. But fear not - for this commit (probably) tracks them all down, leaving a trail of iframe-compatible awesomeness in its wake. With the great ve.ui.Surface now able to be used inside of iframes, let the reference editing commence. But there, lurking in the darkness is a DM issue so fierce it may take Roan and/or Ed up to 3 whole hours to sort it out. Note to Roan and/or Ed: Editing references seems to work fine, but when saving the page there are "no changes" which is a reasonable indication to the contrary. Objectives: * Make it possible to have multiple surfaces be instantiated, get along nicely, and be embedded inside of iframes if needed. * Make reference content editable within a dialog Approach: * Move what's left of ve.Editor to ve.ui.Surface and essentially obliterate all use of it * Make even more stuff inherit from ve.Element (long live this.$$) * Use the correct document or window anywhere it was being assumed to be the top level one * Resolve stacking order issues by removing the excessive use of z-index and introducing global and local overlay elements for each editor * Add a surface to the reference dialog, load up the reference contents and save them back on apply * Actually destroy what we create in ce and ui surfaces * Add recursive frame offset calculation method to ve.Element * Moved ve.ce.Surface's getSelectionRect method to the prototype Bonus: * Move ve.ce.DocumentNode.css contents to ve.ce.Node.css (not sure why it was separate in the first place, but I'm likely the one to blame) * Fix blatant lies in documentation * Whitespace cleanup here and there * Get rid of ve.ui.Window overlays - not used or needed Change-Id: Iede83e7d24f7cb249b6ba3dc45d770445b862e08
2013-05-20 22:45:50 +00:00
var i, len, frames, frame, rect;
if ( !to ) {
to = window;
}
if ( !offset ) {
offset = { 'top': 0, 'left': 0 };
}
if ( from.parent === from ) {
return offset;
}
// Get iframe element
frames = from.parent.document.getElementsByTagName( 'iframe' );
for ( i = 0, len = frames.length; i < len; i++ ) {
The Great ve.ui.Surface refactor of 2013 Prologue: Farewell ve.Editor my good chap… Oh, hey there HTML frames - I didn't see you there! In a world where iframes are outlaws, and symbols like document and window are global, there were more than a few assumptions about which document or window was being used. But fear not - for this commit (probably) tracks them all down, leaving a trail of iframe-compatible awesomeness in its wake. With the great ve.ui.Surface now able to be used inside of iframes, let the reference editing commence. But there, lurking in the darkness is a DM issue so fierce it may take Roan and/or Ed up to 3 whole hours to sort it out. Note to Roan and/or Ed: Editing references seems to work fine, but when saving the page there are "no changes" which is a reasonable indication to the contrary. Objectives: * Make it possible to have multiple surfaces be instantiated, get along nicely, and be embedded inside of iframes if needed. * Make reference content editable within a dialog Approach: * Move what's left of ve.Editor to ve.ui.Surface and essentially obliterate all use of it * Make even more stuff inherit from ve.Element (long live this.$$) * Use the correct document or window anywhere it was being assumed to be the top level one * Resolve stacking order issues by removing the excessive use of z-index and introducing global and local overlay elements for each editor * Add a surface to the reference dialog, load up the reference contents and save them back on apply * Actually destroy what we create in ce and ui surfaces * Add recursive frame offset calculation method to ve.Element * Moved ve.ce.Surface's getSelectionRect method to the prototype Bonus: * Move ve.ce.DocumentNode.css contents to ve.ce.Node.css (not sure why it was separate in the first place, but I'm likely the one to blame) * Fix blatant lies in documentation * Whitespace cleanup here and there * Get rid of ve.ui.Window overlays - not used or needed Change-Id: Iede83e7d24f7cb249b6ba3dc45d770445b862e08
2013-05-20 22:45:50 +00:00
if ( frames[i].contentWindow === from ) {
frame = frames[i];
break;
}
}
// Recursively accumulate offset values
if ( frame ) {
rect = frame.getBoundingClientRect();
offset.left += rect.left;
offset.top += rect.top;
if ( from !== to ) {
this.getFrameOffset( from.parent, offset );
}
}
return offset;
};
/**
* Get the offset between two elements.
*
* @static
ve.ui.Toolbar: Refactor floating logic for performance == Renamed methods == * enableFloating -> enableFloatable * disableFloating -> disableFloatable * setPosition -> float * resetPosition -> unfloat == Scroll and resize event == Timeline for scroll event reduced from about half a dozen "Recalculate style" and various forced "Paint" down to 0. New timeline for scroll is clean (for me: from ~35 to ~59 fps): * 1 Event (scroll) * 1 Composite Layer The composite layer action is the browser changing the viewport to a different portion of the document drawing. Exactly the one thing a simple scroll should do. Timeline for resize event is still pretty crowded and low fps, but it has improved. Further improvement would likely be around using requestAnimation and going outside ve.ui.Toolbar. == Changes == * New: ve.ui.Toolbar#initialize. Similar to what surface has. Users of Toolbar should decide whether to call enableFloatable, append it to the DOM at some point and then call initialize() once. * Don't compute offset() every time. Eliminated by doing it once in #initialize. These 'top' and 'left' offsets do not change. * Don't compute outerWidth() and $window.width() every time. Reduced by doing it once in #initialize to compute the 'right' offset. Updating it only on resize. * Don't set 'top' every time. This is already in the stylesheet. It was never set to anything else so the abstraction for it in #float has been removed. This also made it obvious that code for "ve-ui-toolbar-bottom" was unused and left behind. Tha class was only ever being removed from something (never added). The one addClass call for it was in a condition that is always false ("if top > 0"). * Don't set 'left' every time. Eliminated by doing it once in #float. * Don't set 'right' every time. Reduced by no longer doing it on scroll. Done once in #float, and on resize after computing the new value for it. * Remove no-op style operations. Wrapped methods in if-floatable, if-floated etc. to reduce a fair amount of easily avoided re-paint overhead. * Avoid double re-paint in mw.ViewPageTarget. Though we prevent a lot of redundant re-paints now, whenever we do repaint we want to do it in 1 repaint instead of 2. ve.ui.Toolbar emits #toolbarPosition, which tells mw.ViewPageTarget to update toolbarTracker which would read the new $bar style properties and copy them over to the $toolbarTracker. However, this read operation forces the browser to do an immediate re-paint half-way just for $bar. Browsers only repaint when style properties are changed and JS has yielded. The exception to this is JS reading style properties: in that case the browser is forced to do those deferred repaints directly and reflect the new values. We can avoid this double repaint by passing the updated values as data instead of requiring the receiver to read the DOM (and thus a keep the deferred repaint). Now toolbarTracker can use them directly whilst the browser hasn't even repainted $bar yet. == Clean up == * Redundant "border-radius: 0". This would reset something, but it never does. None of the things it inherits from set a border-radius. There is one subclass where toolbar is used with a border-radius (".ve-ui-surfaceWidget .ve-ui-toolbar-bar" sets a border-radius) which overrides this on purpose, so the default of 0 is redundant. * Pattern "if ( .. ) addClass() else removeClass()" changed to: "toggleClass( , .. )" Bug: 52014 Change-Id: I9be855148962eee068a77fe83e98eb20bbdcfeec
2013-07-25 02:36:01 +00:00
* @param {jQuery} $from
* @param {jQuery} $to
* @returns {Object} Translated position coordinates, containing top and left properties
*/
ve.Element.getRelativePosition = function ( $from, $to ) {
var from = $from.offset(),
to = $to.offset();
return { 'top': from.top - to.top, 'left': from.left - to.left };
};
/**
* Get element border sizes.
*
* @param {HTMLElement} el Element to measure
* @return {Object} Dimensions object with `top`, `left`, `bottom` and `right` properties
*/
ve.Element.getBorders = function ( el ) {
var doc = el.ownerDocument,
win = doc.parentWindow || doc.defaultView,
style = win && win.getComputedStyle ?
win.getComputedStyle( el, null ) : el.currentStyle,
loc = win && win.getComputedStyle ? true : false,
$el = $( el ),
top = parseFloat( loc ? style.borderTopWidth : $el.css( 'borderTopWidth' ) ) || 0,
left = parseFloat( loc ? style.borderLeftWidth : $el.css( 'borderLeftWidth' ) ) || 0,
bottom = parseFloat( loc ? style.borderBottomWidth : $el.css( 'borderBottomWidth' ) ) || 0,
right = parseFloat( loc ? style.borderRightWidth : $el.css( 'borderRightWidth' ) ) || 0;
return {
'top': Math.round( top ),
'left': Math.round( left ),
'bottom': Math.round( bottom ),
'right': Math.round( right )
};
};
/**
* Get dimensions of an element or window.
*
* @param {HTMLElement|Window} el Element to measure
* @return {Object} Dimensions object with `borders`, `scroll`, `scrollbar` and `rect` properties
*/
ve.Element.getDimensions = function ( el ) {
var $el, $win,
doc = el.ownerDocument || el.document,
win = doc.parentWindow || doc.defaultView;
if ( win === el || el === doc.documentElement ) {
$win = $( win );
return {
'borders': { 'top': 0, 'left': 0, 'bottom': 0, 'right': 0 },
'scroll': {
'top': $win.scrollTop(),
'left': $win.scrollLeft()
},
'scrollbar': { 'right': 0, 'bottom': 0 },
'rect': {
'top': 0,
'left': 0,
'bottom': $win.innerHeight(),
'right': $win.innerWidth()
}
};
} else {
$el = $( el );
return {
'borders': this.getBorders( el ),
'scroll': {
'top': $el.scrollTop(),
'left': $el.scrollLeft()
},
'scrollbar': {
'right': $el.innerWidth() - el.clientWidth,
'bottom': $el.innerHeight() - el.clientHeight
},
'rect': el.getBoundingClientRect()
};
}
};
/**
* Get closest scrollable container.
*
* Traverses up until either a scrollable element or the root is reached, in which case the window
* will be returned.
*
* @static
* @param {HTMLElement} el Element to find scrollable container for
* @param {string} [dimension] Dimension of scrolling to look for; `x`, `y` or omit for either
* @return {HTMLElement|Window} Closest scrollable container
*/
ve.Element.getClosestScrollableContainer = function ( el, dimension ) {
var i, val,
props = [ 'overflow' ],
$parent = $( el ).parent();
if ( dimension === 'x' || dimension === 'y' ) {
props.push( 'overflow-' + dimension );
}
while ( $parent ) {
if ( $parent[0] === el.ownerDocument.documentElement ) {
break;
}
i = props.length;
while ( i-- ) {
val = $parent.css( props[i] );
if ( val === 'auto' || val === 'scroll' ) {
return $parent[0];
}
}
$parent = $parent.parent();
}
return this.getWindow( el );
};
/**
* Scroll element into view
*
* @static
* @param {HTMLElement} el Element to scroll into view
* @param {Object} [config] Configuration config
* @param {string} [config.duration] jQuery animation duration value
* @param {string} [config.direction] Scroll in only one direction, e.g. 'x' or 'y', omit
* to scroll in both directions
* @param {Function} [config.complete] Function to call when scrolling completes
*/
ve.Element.scrollIntoView = function ( el, config ) {
// Configuration initialization
config = config || {};
var anim = {},
callback = typeof config.complete === 'function' && config.complete,
sc = this.getClosestScrollableContainer( el, config.direction ),
$sc = $( sc ),
eld = this.getDimensions( el ),
scd = this.getDimensions( sc ),
rel = {
'top': eld.rect.top - ( scd.rect.top + scd.borders.top ),
'bottom': scd.rect.bottom - scd.borders.bottom - scd.scrollbar.bottom - eld.rect.bottom,
'left': eld.rect.left - ( scd.rect.left + scd.borders.left ),
'right': scd.rect.right - scd.borders.right - scd.scrollbar.right - eld.rect.right
};
if ( !config.direction || config.direction === 'y' ) {
if ( rel.top < 0 ) {
anim.scrollTop = scd.scroll.top + rel.top;
} else if ( rel.top > 0 && rel.bottom < 0 ) {
anim.scrollTop = scd.scroll.top + Math.min( rel.top, -rel.bottom );
}
}
if ( !config.direction || config.direction === 'x' ) {
if ( rel.left < 0 ) {
anim.scrollLeft = scd.scroll.left + rel.left;
} else if ( rel.left > 0 && rel.right < 0 ) {
anim.scrollLeft = scd.scroll.left + Math.min( rel.left, -rel.right );
}
}
if ( !ve.isEmptyObject( anim ) ) {
$sc.stop( true ).animate( anim, config.duration || 'fast' );
if ( callback ) {
$sc.queue( function ( next ) {
callback();
next();
} );
}
} else {
if ( callback ) {
callback();
}
}
};
/* Methods */
/**
* Get the HTML tag name.
*
* Override this method to base the result on instance information.
*
* @returns {string} HTML tag name
*/
ve.Element.prototype.getTagName = function () {
return this.constructor.static.tagName;
};
/**
* Get the DOM document.
*
* @returns {HTMLDocument} Document object
*/
ve.Element.prototype.getElementDocument = function () {
return ve.Element.getDocument( this.$ );
};
/**
* Get the DOM window.
*
* @returns {Window} Window object
*/
ve.Element.prototype.getElementWindow = function () {
return ve.Element.getWindow( this.$ );
};
/**
* Get closest scrollable container.
*
* @method
* @see #static-method-getClosestScrollableContainer
*/
ve.Element.prototype.getClosestScrollableElementContainer = function () {
return ve.Element.getClosestScrollableContainer( this.$[0] );
};
/**
* Scroll element into view
*
* @method
* @see #static-method-scrollIntoView
*/
ve.Element.prototype.scrollElementIntoView = function ( config ) {
return ve.Element.scrollIntoView( this.$[0], config );
};