Component2.html
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<!DOCTYPE html>
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<title>The source code</title>
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<pre class="prettyprint lang-js"><span id='Ext-layout-component-Component'>/**
</span> * This class is intended to be extended or created via the {@link Ext.Component#componentLayout layout}
* configuration property. See {@link Ext.Component#componentLayout} for additional details.
* @private
*/
Ext.define('Ext.layout.component.Component', {
/* Begin Definitions */
extend: 'Ext.layout.Layout',
/* End Definitions */
type: 'component',
isComponentLayout: true,
nullBox: {},
usesContentHeight: true,
usesContentWidth: true,
usesHeight: true,
usesWidth: true,
beginLayoutCycle: function (ownerContext, firstCycle) {
var me = this,
owner = me.owner,
ownerCtContext = ownerContext.ownerCtContext,
heightModel = ownerContext.heightModel,
widthModel = ownerContext.widthModel,
body = owner.el.dom === document.body,
lastBox = owner.lastBox || me.nullBox,
lastSize = owner.el.lastBox || me.nullBox,
dirty = !body,
ownerLayout, v, widthName, heightName;
me.callParent(arguments);
if (firstCycle) {
if (me.usesContentWidth) {
++ownerContext.consumersContentWidth;
}
if (me.usesContentHeight) {
++ownerContext.consumersContentHeight;
}
if (me.usesWidth) {
++ownerContext.consumersWidth;
}
if (me.usesHeight) {
++ownerContext.consumersHeight;
}
if (ownerCtContext && !ownerCtContext.hasRawContent) {
ownerLayout = owner.ownerLayout;
if (ownerLayout.usesWidth) {
++ownerContext.consumersWidth;
}
if (ownerLayout.usesHeight) {
++ownerContext.consumersHeight;
}
}
}
// we want to publish configured dimensions as early as possible and since this is
// a write phase...
if (widthModel.configured) {
// If the owner.el is the body, owner.width is not dirty (we don't want to write
// it to the body el). For other el's, the width may already be correct in the
// DOM (e.g., it is rendered in the markup initially). If the width is not
// correct in the DOM, this is only going to be the case on the first cycle.
widthName = widthModel.names.width;
if (!body) {
dirty = firstCycle ? owner[widthName] !== lastSize.width
: widthModel.constrained;
}
ownerContext.setWidth(owner[widthName], dirty);
} else if (ownerContext.isTopLevel) {
if (widthModel.calculated) {
v = lastBox.width;
ownerContext.setWidth(v, /*dirty=*/v != lastSize.width);
}
v = lastBox.x;
ownerContext.setProp('x', v, /*dirty=*/v != lastSize.x);
}
if (heightModel.configured) {
heightName = heightModel.names.height;
if (!body) {
dirty = firstCycle ? owner[heightName] !== lastSize.height
: heightModel.constrained;
}
ownerContext.setHeight(owner[heightName], dirty);
} else if (ownerContext.isTopLevel) {
if (heightModel.calculated) {
v = lastBox.height;
ownerContext.setHeight(v, v != lastSize.height);
}
v = lastBox.y;
ownerContext.setProp('y', v, /*dirty=*/v != lastSize.y);
}
},
finishedLayout: function(ownerContext) {
var me = this,
elementChildren = ownerContext.children,
owner = me.owner,
len, i, elContext, lastBox, props, v;
// NOTE: In the code below we cannot use getProp because that will generate a layout dependency
// Set lastBox on managed child Elements.
// So that ContextItem.constructor can snag the lastBox for use by its undo method.
if (elementChildren) {
len = elementChildren.length;
for (i = 0; i < len; i++) {
elContext = elementChildren[i];
elContext.el.lastBox = elContext.props;
}
}
// Cache the size from which we are changing so that notifyOwner can notify the owningComponent with all essential information
ownerContext.previousSize = me.lastComponentSize;
// Cache the currently layed out size
me.lastComponentSize = owner.el.lastBox = props = ownerContext.props;
// lastBox is a copy of the defined props to allow save/restore of these (panel
// collapse needs this)
owner.lastBox = lastBox = {};
v = props.x;
if (v !== undefined) {
lastBox.x = v;
}
v = props.y;
if (v !== undefined) {
lastBox.y = v;
}
v = props.width;
if (v !== undefined) {
lastBox.width = v;
}
v = props.height;
if (v !== undefined) {
lastBox.height = v;
}
me.callParent(arguments);
},
notifyOwner: function(ownerContext) {
var me = this,
currentSize = me.lastComponentSize,
prevSize = ownerContext.previousSize,
args = [currentSize.width, currentSize.height];
if (prevSize) {
args.push(prevSize.width, prevSize.height);
}
// Call afterComponentLayout passing new size, and only passing old size if there *was* an old size.
me.owner.afterComponentLayout.apply(me.owner, args);
},
<span id='Ext-layout-component-Component-method-getTarget'> /**
</span> * Returns the owner component's resize element.
* @return {Ext.Element}
*/
getTarget : function() {
return this.owner.el;
},
<span id='Ext-layout-component-Component-method-getRenderTarget'> /**
</span> * Returns the element into which rendering must take place. Defaults to the owner Component's encapsulating element.
*
* May be overridden in Component layout managers which implement an inner element.
* @return {Ext.Element}
*/
getRenderTarget : function() {
return this.owner.el;
},
cacheTargetInfo: function(ownerContext) {
var me = this,
targetInfo = me.targetInfo,
target;
if (!targetInfo) {
target = ownerContext.getEl('getTarget', me);
me.targetInfo = targetInfo = {
padding: target.getPaddingInfo(),
border: target.getBorderInfo()
};
}
return targetInfo;
},
measureAutoDimensions: function (ownerContext, dimensions) {
// Subtle But Important:
//
// We don't want to call getProp/hasProp et.al. unless we in fact need that value
// for our results! If we call it and don't need it, the layout manager will think
// we depend on it and will schedule us again should it change.
var me = this,
owner = me.owner,
containerLayout = owner.layout,
heightModel = ownerContext.heightModel,
widthModel = ownerContext.widthModel,
boxParent = ownerContext.boxParent,
isBoxParent = ownerContext.isBoxParent,
props = ownerContext.props,
isContainer,
ret = {
gotWidth: false,
gotHeight: false,
isContainer: (isContainer = !ownerContext.hasRawContent)
},
hv = dimensions || 3,
zeroWidth, zeroHeight,
needed = 0,
got = 0,
ready, size, temp;
// Note: this method is called *a lot*, so we have to be careful not to waste any
// time or make useless calls or, especially, read the DOM when we can avoid it.
//---------------------------------------------------------------------
// Width
if (widthModel.shrinkWrap && ownerContext.consumersContentWidth) {
++needed;
zeroWidth = !(hv & 1);
if (isContainer) {
// as a componentLayout for a container, we rely on the container layout to
// produce contentWidth...
if (zeroWidth) {
ret.contentWidth = 0;
ret.gotWidth = true;
++got;
} else if ((ret.contentWidth = ownerContext.getProp('contentWidth')) !== undefined) {
ret.gotWidth = true;
++got;
}
} else {
size = props.contentWidth;
if (typeof size == 'number') { // if (already determined)
ret.contentWidth = size;
ret.gotWidth = true;
++got;
} else {
if (zeroWidth) {
ready = true;
} else if (!ownerContext.hasDomProp('containerChildrenDone')) {
ready = false;
} else if (isBoxParent || !boxParent || boxParent.widthModel.shrinkWrap) {
// if we have no boxParent, we are ready, but a shrinkWrap boxParent
// artificially provides width early in the measurement process so
// we are ready to go in that case as well...
ready = true;
} else {
// lastly, we have a boxParent that will be given a width, so we
// can wait for that width to be set in order to properly measure
// whatever is inside...
ready = boxParent.hasDomProp('width');
}
if (ready) {
if (zeroWidth) {
temp = 0;
} else if (containerLayout && containerLayout.measureContentWidth) {
// Allow the container layout to do the measurement since it
// may have a better idea of how to do it even with no items:
temp = containerLayout.measureContentWidth(ownerContext);
} else {
temp = me.measureContentWidth(ownerContext);
}
if (!isNaN(ret.contentWidth = temp)) {
ownerContext.setContentWidth(temp, true);
ret.gotWidth = true;
++got;
}
}
}
}
} else if (widthModel.natural && ownerContext.consumersWidth) {
++needed;
size = props.width;
// zeroWidth does not apply
if (typeof size == 'number') { // if (already determined)
ret.width = size;
ret.gotWidth = true;
++got;
} else {
if (isBoxParent || !boxParent) {
ready = true;
} else {
// lastly, we have a boxParent that will be given a width, so we
// can wait for that width to be set in order to properly measure
// whatever is inside...
ready = boxParent.hasDomProp('width');
}
if (ready) {
if (!isNaN(ret.width = me.measureOwnerWidth(ownerContext))) {
ownerContext.setWidth(ret.width, false);
ret.gotWidth = true;
++got;
}
}
}
}
//---------------------------------------------------------------------
// Height
if (heightModel.shrinkWrap && ownerContext.consumersContentHeight) {
++needed;
zeroHeight = !(hv & 2);
if (isContainer) {
// don't ask unless we need to know...
if (zeroHeight) {
ret.contentHeight = 0;
ret.gotHeight = true;
++got;
} else if ((ret.contentHeight = ownerContext.getProp('contentHeight')) !== undefined) {
ret.gotHeight = true;
++got;
}
} else {
size = props.contentHeight;
if (typeof size == 'number') { // if (already determined)
ret.contentHeight = size;
ret.gotHeight = true;
++got;
} else {
if (zeroHeight) {
ready = true;
} else if (!ownerContext.hasDomProp('containerChildrenDone')) {
ready = false;
} else if (owner.noWrap) {
ready = true;
} else if (!widthModel.shrinkWrap) {
// fixed width, so we need the width to determine the height...
ready = (ownerContext.bodyContext || ownerContext).hasDomProp('width');// && (!ownerContext.bodyContext || ownerContext.bodyContext.hasDomProp('width'));
} else if (isBoxParent || !boxParent || boxParent.widthModel.shrinkWrap) {
// if we have no boxParent, we are ready, but an autoWidth boxParent
// artificially provides width early in the measurement process so
// we are ready to go in that case as well...
ready = true;
} else {
// lastly, we have a boxParent that will be given a width, so we
// can wait for that width to be set in order to properly measure
// whatever is inside...
ready = boxParent.hasDomProp('width');
}
if (ready) {
if (zeroHeight) {
temp = 0;
} else if (containerLayout && containerLayout.measureContentHeight) {
// Allow the container layout to do the measurement since it
// may have a better idea of how to do it even with no items:
temp = containerLayout.measureContentHeight(ownerContext);
} else {
temp = me.measureContentHeight(ownerContext);
}
if (!isNaN(ret.contentHeight = temp)) {
ownerContext.setContentHeight(temp, true);
ret.gotHeight = true;
++got;
}
}
}
}
} else if (heightModel.natural && ownerContext.consumersHeight) {
++needed;
size = props.height;
// zeroHeight does not apply
if (typeof size == 'number') { // if (already determined)
ret.height = size;
ret.gotHeight = true;
++got;
} else {
if (isBoxParent || !boxParent) {
ready = true;
} else {
// lastly, we have a boxParent that will be given a width, so we
// can wait for that width to be set in order to properly measure
// whatever is inside...
ready = boxParent.hasDomProp('width');
}
if (ready) {
if (!isNaN(ret.height = me.measureOwnerHeight(ownerContext))) {
ownerContext.setHeight(ret.height, false);
ret.gotHeight = true;
++got;
}
}
}
}
if (boxParent) {
ownerContext.onBoxMeasured();
}
ret.gotAll = got == needed;
// see if we can avoid calling this method by storing something on ownerContext.
return ret;
},
measureContentWidth: function (ownerContext) {
// contentWidth includes padding, but not border, framing or margins
return ownerContext.el.getWidth() - ownerContext.getFrameInfo().width;
},
measureContentHeight: function (ownerContext) {
// contentHeight includes padding, but not border, framing or margins
return ownerContext.el.getHeight() - ownerContext.getFrameInfo().height;
},
measureOwnerHeight: function (ownerContext) {
return ownerContext.el.getHeight();
},
measureOwnerWidth: function (ownerContext) {
return ownerContext.el.getWidth();
}
});
</pre>
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