/** * Manages context information during a layout. * * # Algorithm * * This class performs the following jobs: * * - Cache DOM reads to avoid reading the same values repeatedly. * - Buffer DOM writes and flush them as a block to avoid read/write interleaving. * - Track layout dependencies so each layout does not have to figure out the source of * its dependent values. * - Intelligently run layouts when the values on which they depend change (a trigger). * - Allow layouts to avoid processing when required values are unavailable (a block). * * Work done during layout falls into either a "read phase" or a "write phase" and it is * essential to always be aware of the current phase. Most methods in * {@link Ext.layout.Layout Layout} are called during a read phase: * {@link Ext.layout.Layout#calculate calculate}, * {@link Ext.layout.Layout#completeLayout completeLayout} and * {@link Ext.layout.Layout#finalizeLayout finalizeLayout}. The exceptions to this are * {@link Ext.layout.Layout#beginLayout beginLayout}, * {@link Ext.layout.Layout#beginLayoutCycle beginLayoutCycle} and * {@link Ext.layout.Layout#finishedLayout finishedLayout} which are called during * a write phase. While {@link Ext.layout.Layout#finishedLayout finishedLayout} is called * a write phase, it is really intended to be a catch-all for post-processing after a * layout run. * * In a read phase, it is OK to read the DOM but this should be done using the appropriate * {@link Ext.layout.ContextItem ContextItem} where possible since that provides a cache * to avoid redundant reads. No writes should be made to the DOM in a read phase! Instead, * the values should be written to the proper ContextItem for later write-back. * * The rules flip-flop in a write phase. The only difference is that ContextItem methods * like {@link Ext.layout.ContextItem#getStyle getStyle} will still read the DOM unless the * value was previously read. This detail is unknowable from the outside of ContextItem, so * read calls to ContextItem should also be avoided in a write phase. * * Calculating interdependent layouts requires a certain amount of iteration. In a given * cycle, some layouts will contribute results that allow other layouts to proceed. The * general flow then is to gather all of the layouts (both component and container) in a * component tree and queue them all for processing. The initial queue order is bottom-up * and component layout first, then container layout (if applicable) for each component. * * This initial step also calls the beginLayout method on all layouts to clear any values * from the DOM that might interfere with calculations and measurements. In other words, * this is a "write phase" and reads from the DOM should be strictly avoided. * * Next the layout enters into its iterations or "cycles". Each cycle consists of calling * the {@link Ext.layout.Layout#calculate calculate} method on all layouts in the * {@link #layoutQueue}. These calls are part of a "read phase" and writes to the DOM should * be strictly avoided. * * # Considerations * * **RULE 1**: Respect the read/write cycles. Always use the {@link Ext.layout.ContextItem#getProp getProp} * or {@link Ext.layout.ContextItem#getDomProp getDomProp} methods to get calculated values; * only use the {@link Ext.layout.ContextItem#getStyle getStyle} method to read styles; use * {@link Ext.layout.ContextItem#setProp setProp} to set DOM values. Some reads will, of * course, still go directly to the DOM, but if there is a method in * {@link Ext.layout.ContextItem ContextItem} to do a certain job, it should be used instead * of a lower-level equivalent. * * The basic logic flow in {@link Ext.layout.Layout#calculate calculate} consists of gathering * values by calling {@link Ext.layout.ContextItem#getProp getProp} or * {@link Ext.layout.ContextItem#getDomProp getDomProp}, calculating results and publishing * them by calling {@link Ext.layout.ContextItem#setProp setProp}. It is important to realize * that {@link Ext.layout.ContextItem#getProp getProp} will return `undefined` if the value * is not yet known. But the act of calling the method is enough to track the fact that the * calling layout depends (in some way) on this value. In other words, the calling layout is * "triggered" by the properties it requests. * * **RULE 2**: Avoid calling {@link Ext.layout.ContextItem#getProp getProp} unless the value * is needed. Gratuitous calls cause inefficiency because the layout will appear to depend on * values that it never actually uses. This applies equally to * {@link Ext.layout.ContextItem#getDomProp getDomProp} and the test-only methods * {@link Ext.layout.ContextItem#hasProp hasProp} and {@link Ext.layout.ContextItem#hasDomProp hasDomProp}. * * Because {@link Ext.layout.ContextItem#getProp getProp} can return `undefined`, it is often * the case that subsequent math will produce NaN's. This is usually not a problem as the * NaN's simply propagate along and result in final results that are NaN. Both `undefined` * and NaN are ignored by {@link Ext.layout.ContextItem#setProp}, so it is often not necessary * to even know that this is happening. It does become important for determining if a layout * is not done or if it might lead to publishing an incorrect (but not NaN or `undefined`) * value. * * **RULE 3**: If a layout has not calculated all the values it is required to calculate, it * must set {@link Ext.layout.Layout#done done} to `false` before returning from * {@link Ext.layout.Layout#calculate calculate}. This value is always `true` on entry because * it is simpler to detect the incomplete state rather than the complete state (especially up * and down a class hierarchy). * * **RULE 4**: A layout must never publish an incomplete (wrong) result. Doing so would cause * dependent layouts to run their calculations on those wrong values, producing more wrong * values and some layouts may even incorrectly flag themselves as {@link Ext.layout.Layout#done done} * before the correct values are determined and republished. Doing this will poison the * calculations. * * **RULE 5**: Each value should only be published by one layout. If multiple layouts attempt * to publish the same values, it would be nearly impossible to avoid breaking **RULE 4**. To * help detect this problem, the layout diagnostics will trap on an attempt to set a value * from different layouts. * * Complex layouts can produce many results as part of their calculations. These values are * important for other layouts to proceed and need to be published by the earliest possible * call to {@link Ext.layout.Layout#calculate} to avoid unnecessary cycles and poor performance. It is * also possible, however, for some results to be related in a way such that publishing them * may be an all-or-none proposition (typically to avoid breaking *RULE 4*). * * **RULE 6**: Publish results as soon as they are known to be correct rather than wait for * all values to be calculated. Waiting for everything to be complete can lead to deadlock. * The key here is not to forget **RULE 4** in the process. * * Some layouts depend on certain critical values as part of their calculations. For example, * HBox depends on width and cannot do anything until the width is known. In these cases, it * is best to use {@link Ext.layout.ContextItem#block block} or * {@link Ext.layout.ContextItem#domBlock domBlock} and thereby avoid processing the layout * until the needed value is available. * * **RULE 7**: Use {@link Ext.layout.ContextItem#block block} or * {@link Ext.layout.ContextItem#domBlock domBlock} when values are required to make progress. * This will mimize wasted recalculations. * * **RULE 8**: Blocks should only be used when no forward progress can be made. If even one * value could still be calculated, a block could result in a deadlock. * * Historically, layouts have been invoked directly by component code, sometimes in places * like an `afterLayout` method for a child component. With the flexibility now available * to solve complex, iterative issues, such things should be done in a responsible layout * (be it component or container). * * **RULE 9**: Use layouts to solve layout issues and don't wait for the layout to finish to * perform further layouts. This is especially important now that layouts process entire * component trees and not each layout in isolation. * * # Sequence Diagram * * The simplest sequence diagram for a layout run looks roughly like this: * * Context Layout 1 Item 1 Layout 2 Item 2 * | | | | | * ---->X-------------->X | | | * run X---------------|-----------|---------->X | * X beginLayout | | | | * X | | | | * A X-------------->X | | | * X calculate X---------->X | | * X C X getProp | | | * B X X---------->X | | * X | setProp | | | * X | | | | * D X---------------|-----------|---------->X | * X calculate | | X---------->X * X | | | setProp | * E X | | | | * X---------------|-----------|---------->X | * X completeLayout| | F | | * X | | | | * G X | | | | * H X-------------->X | | | * X calculate X---------->X | | * X I X getProp | | | * X X---------->X | | * X | setProp | | | * J X-------------->X | | | * X completeLayout| | | | * X | | | | * K X-------------->X | | | * X---------------|-----------|---------->X | * X finalizeLayout| | | | * X | | | | * L X-------------->X | | | * X---------------|-----------|---------->X | * X finishedLayout| | | | * X | | | | * M X-------------->X | | | * X---------------|-----------|---------->X | * X notifyOwner | | | | * N | | | | | * - - - - - * * * Notes: * * **A.** This is a call from the {@link #run} method to the {@link #run} method. * Each layout in the queue will have its {@link Ext.layout.Layout#calculate calculate} * method called. * * **B.** After each {@link Ext.layout.Layout#calculate calculate} method is called the * {@link Ext.layout.Layout#done done} flag is checked to see if the Layout has completed. * If it has completed and that layout object implements a * {@link Ext.layout.Layout#completeLayout completeLayout} method, this layout is queued to * receive its call. Otherwise, the layout will be queued again unless there are blocks or * triggers that govern its requeueing. * * **C.** The call to {@link Ext.layout.ContextItem#getProp getProp} is made to the Item * and that will be tracked as a trigger (keyed by the name of the property being requested). * Changes to this property will cause this layout to be requeued. The call to * {@link Ext.layout.ContextItem#setProp setProp} will place a value in the item and not * directly into the DOM. * * **D.** Call the other layouts now in the first cycle (repeat **B** and **C** for each * layout). * * **E.** After completing a cycle, if progress was made (new properties were written to * the context) and if the {@link #layoutQueue} is not empty, the next cycle is run. If no * progress was made or no layouts are ready to run, all buffered values are written to * the DOM (a flush). * * **F.** After flushing, any layouts that were marked as {@link Ext.layout.Layout#done done} * that also have a {@link Ext.layout.Layout#completeLayout completeLayout} method are called. * This can cause them to become no longer done (see {@link #invalidate}). As with * {@link Ext.layout.Layout#calculate calculate}, this is considered a "read phase" and * direct DOM writes should be avoided. * * **G.** Flushing and calling any pending {@link Ext.layout.Layout#completeLayout completeLayout} * methods will likely trigger layouts that called {@link Ext.layout.ContextItem#getDomProp getDomProp} * and unblock layouts that have called {@link Ext.layout.ContextItem#domBlock domBlock}. * These variants are used when a layout needs the value to be correct in the DOM and not * simply known. If this does not cause at least one layout to enter the queue, we have a * layout FAILURE. Otherwise, we continue with the next cycle. * * **H.** Call {@link Ext.layout.Layout#calculate calculate} on any layouts in the queue * at the start of this cycle. Just a repeat of **B** through **G**. * * **I.** Once the layout has calculated all that it is resposible for, it can leave itself * in the {@link Ext.layout.Layout#done done} state. This is the value on entry to * {@link Ext.layout.Layout#calculate calculate} and must be cleared in that call if the * layout has more work to do. * * **J.** Now that all layouts are done, flush any DOM values and * {@link Ext.layout.Layout#completeLayout completeLayout} calls. This can again cause * layouts to become not done, and so we will be back on another cycle if that happens. * * **K.** After all layouts are done, call the {@link Ext.layout.Layout#finalizeLayout finalizeLayout} * method on any layouts that have one. As with {@link Ext.layout.Layout#completeLayout completeLayout}, * this can cause layouts to become no longer done. This is less desirable than using * {@link Ext.layout.Layout#completeLayout completeLayout} because it will cause all * {@link Ext.layout.Layout#finalizeLayout finalizeLayout} methods to be called again * when we think things are all wrapped up. * * **L.** After finishing the last iteration, layouts that have a * {@link Ext.layout.Layout#finishedLayout finishedLayout} method will be called. This * call will only happen once per run and cannot cause layouts to be run further. * * **M.** After calling finahedLayout, layouts that have a * {@link Ext.layout.Layout#notifyOwner notifyOwner} method will be called. This * call will only happen once per run and cannot cause layouts to be run further. * * **N.** One last flush to make sure everything has been written to the DOM. * * # Inter-Layout Collaboration * * Many layout problems require collaboration between multiple layouts. In some cases, this * is as simple as a component's container layout providing results used by its component * layout or vise-versa. A slightly more distant collaboration occurs in a box layout when * stretchmax is used: the child item's component layout provides results that are consumed * by the ownerCt's box layout to determine the size of the children. * * The various forms of interdependence between a container and its children are described by * each components' {@link Ext.Component#getSizeModel size model}. * * To facilitate this collaboration, the following pairs of properties are published to the * component's {@link Ext.layout.ContextItem ContextItem}: * * - width/height: These hold the final size of the component. The layout indicated by the * {@link Ext.Component#getSizeModel size model} is responsible for setting these. * - contentWidth/contentHeight: These hold size information published by the container * layout or from DOM measurement. These describe the content only. These values are * used by the component layout to determine the outer width/height when that component * is {@link Ext.Component#shrinkWrap shrink-wrapped}. They are also used to * determine overflow. All container layouts must publish these values for dimensions * that are shrink-wrapped. If a component has raw content (not container items), the * componentLayout must publish these values instead. * * @private */Ext.define('Ext.layout.Context', { requires: [ //<debug> 'Ext.perf.Monitor', //</debug> 'Ext.util.Queue', 'Ext.layout.ContextItem', 'Ext.layout.Layout', 'Ext.fx.Anim', 'Ext.fx.Manager' ], remainingLayouts: 0, /** * @property {Number} state One of these values: * * - 0 - Before run * - 1 - Running * - 2 - Run complete */ state: 0, /** * @property {Number} cycleWatchDog * This value is used to detect layouts that cannot progress by checking the amount of * cycles processed. The value should be large enough to satisfy all but exceptionally large * layout structures. When the amount of cycles is reached, the layout will fail. This should * only be used for debugging, layout failures should be considered as an exceptional occurrence. * @private * @since 5.1.1 */ cycleWatchDog: 200, constructor: function (config) { var me = this; Ext.apply(me, config); // holds the ContextItem collection, keyed by element id me.items = {}; // a collection of layouts keyed by layout id me.layouts = {}; // the number of blocks of any kind: me.blockCount = 0; // the number of cycles that have been run: me.cycleCount = 0; // the number of flushes to the DOM: me.flushCount = 0; // the number of layout calculate calls: me.calcCount = 0; me.animateQueue = me.newQueue(); me.completionQueue = me.newQueue(); me.finalizeQueue = me.newQueue(); me.finishQueue = me.newQueue(); me.flushQueue = me.newQueue(); me.invalidateData = {}; /** * @property {Ext.util.Queue} layoutQueue * List of layouts to perform. */ me.layoutQueue = me.newQueue(); // this collection is special because we ensure that there are no parent/child pairs // present, only distinct top-level components me.invalidQueue = []; me.triggers = { data: { /* layoutId: [ { item: contextItem, prop: propertyName } ] */ }, dom: {} }; }, callLayout: function (layout, methodName) { this.currentLayout = layout; layout[methodName](this.getCmp(layout.owner)); }, cancelComponent: function (comp, isChild, isDestroying) { var me = this, components = comp, isArray = !comp.isComponent, length = isArray ? components.length : 1, i, k, klen, items, layout, newQueue, oldQueue, entry, temp, ownerCtContext; for (i = 0; i < length; ++i) { if (isArray) { comp = components[i]; } // If the component is being destroyed, remove the component's ContextItem from its parent's contextItem.childItems array if (isDestroying && comp.ownerCt) { ownerCtContext = this.items[comp.ownerCt.el.id]; if (ownerCtContext) { Ext.Array.remove(ownerCtContext.childItems, me.getCmp(comp)); } } if (!isChild) { oldQueue = me.invalidQueue; klen = oldQueue.length; if (klen) { me.invalidQueue = newQueue = []; for (k = 0; k < klen; ++k) { entry = oldQueue[k]; temp = entry.item.target; if (temp !== comp && !temp.up(comp)) { newQueue.push(entry); } } } } layout = comp.componentLayout; me.cancelLayout(layout); if (layout.getLayoutItems) { items = layout.getLayoutItems(); if (items.length) { me.cancelComponent(items, true); } } if (comp.isContainer && !comp.collapsed) { layout = comp.layout; me.cancelLayout(layout); items = layout.getVisibleItems(); if (items.length) { me.cancelComponent(items, true); } } } }, cancelLayout: function (layout) { var me = this; me.completionQueue.remove(layout); me.finalizeQueue.remove(layout); me.finishQueue.remove(layout); me.layoutQueue.remove(layout); if (layout.running) { me.layoutDone(layout); } layout.ownerContext = null; }, clearTriggers: function (layout, inDom) { var id = layout.id, collection = this.triggers[inDom ? 'dom' : 'data'], triggers = collection && collection[id], length = (triggers && triggers.length) || 0, i, item, trigger; for (i = 0; i < length; ++i) { trigger = triggers[i]; item = trigger.item; collection = inDom ? item.domTriggers : item.triggers; delete collection[trigger.prop][id]; } }, /** * Flushes any pending writes to the DOM by calling each ContextItem in the flushQueue. */ flush: function () { var me = this, items = me.flushQueue.clear(), length = items.length, i; if (length) { ++me.flushCount; for (i = 0; i < length; ++i) { items[i].flush(); } } }, flushAnimations: function() { var me = this, items = me.animateQueue.clear(), len = items.length, i; if (len) { for (i = 0; i < len; i++) { // Each Component may refuse to participate in animations. // This is used by the BoxReorder plugin which drags a Component, // during which that Component must be exempted from layout positioning. if (items[i].target.animate !== false) { items[i].flushAnimations(); } } // Ensure the first frame fires now to avoid a browser repaint with the elements in the "to" state // before they are returned to their "from" state by the animation. Ext.fx.Manager.runner(); } }, flushInvalidates: function () { var me = this, queue = me.invalidQueue, length = queue && queue.length, comp, components, entry, i; me.invalidQueue = []; if (length) { components = []; for (i = 0; i < length; ++i) { comp = (entry = queue[i]).item.target; // we filter out-of-body components here but allow them into the queue to // ensure that their child components are coalesced out (w/no additional // cost beyond our normal effort to avoid parent/child components in the // queue) if (!comp.container.isDetachedBody) { components.push(comp); if (entry.options) { me.invalidateData[comp.id] = entry.options; } } } me.invalidate(components, null); } }, flushLayouts: function (queueName, methodName, dontClear) { var me = this, layouts = dontClear ? me[queueName].items : me[queueName].clear(), length = layouts.length, i, layout; if (length) { for (i = 0; i < length; ++i) { layout = layouts[i]; if (!layout.running) { me.callLayout(layout, methodName); } } me.currentLayout = null; } }, /** * Returns the ContextItem for a component. * @param {Ext.Component} cmp */ getCmp: function (cmp) { return this.getItem(cmp, cmp.el); }, /** * Returns the ContextItem for an element. * @param {Ext.layout.ContextItem} parent * @param {Ext.dom.Element} el */ getEl: function (parent, el) { var item = this.getItem(el, el); if (!item.parent) { item.parent = parent; // all items share an empty children array (to avoid null checks), so we can // only push on to the children array if there is already something there (we // copy-on-write): if (parent.children.length) { parent.children.push(item); } else { parent.children = [ item ]; // now parent has its own children[] (length=1) } } return item; }, getItem: function (target, el) { var id = el.id, items = this.items, item = items[id] || (items[id] = new Ext.layout.ContextItem({ context: this, target: target, el: el })); return item; }, handleFailure: function () { // This method should never be called, but is need when layouts fail (hence the // "should never"). We just disconnect any of the layouts from the run and return // them to the state they would be in had the layout completed properly. var layouts = this.layouts, layout, key; Ext.failedLayouts = (Ext.failedLayouts || 0) + 1; for (key in layouts) { layout = layouts[key]; if (layouts.hasOwnProperty(key)) { layout.running = false; layout.ownerContext = null; } } //<debug> if (Ext.repoDevMode && !this.pageAnalyzerMode) { Ext.Error.raise('Layout run failed'); } else { Ext.log.error('Layout run failed'); } //</debug> }, /** * Invalidates one or more components' layouts (component and container). This can be * called before run to identify the components that need layout or during the run to * restart the layout of a component. This is called internally to flush any queued * invalidations at the start of a cycle. If called during a run, it is not expected * that new components will be introduced to the layout. * * @param {Ext.Component/Array} components An array of Components or a single Component. * @param {Boolean} full True if all properties should be invalidated, otherwise only * those calculated by the component should be invalidated. */ invalidate: function (components, full) { var me = this, isArray = !components.isComponent, containerLayoutDone, ownerLayout, firstTime, i, comp, item, items, length, componentLayout, layout, invalidateOptions, token, skipLayout; for (i = 0, length = isArray ? components.length : 1; i < length; ++i) { comp = isArray ? components[i] : components; if (comp.rendered && !comp.hidden) { ownerLayout = comp.ownerLayout; componentLayout = comp.componentLayout; firstTime = !componentLayout.ownerContext; skipLayout = false; if ((!ownerLayout || !ownerLayout.needsItemSize) && comp.liquidLayout) { // our owning layout doesn't need us to run, and our componentLayout // wants to opt out because it uses liquid CSS layout. // We can skip invalidation for this component. skipLayout = true; } // if we are skipping layout, we can also skip creation of the context // item, unless our owner layout needs it to set our size. if (!skipLayout || (ownerLayout && ownerLayout.setsItemSize)) { item = me.getCmp(comp); // If the component has had no changes which necessitate a layout, do not lay it out. // Temporarily disabled because this breaks dock layout (see EXTJSIV-10251) // if (item.optOut) { // skipLayout = true; // } layout = (comp.isContainer && !comp.collapsed) ? comp.layout : null; // Extract any invalidate() options for this item. invalidateOptions = me.invalidateData[item.id]; delete me.invalidateData[item.id]; // We invalidate the contextItem's in a top-down manner so that SizeModel // info for containers is available to their children. This is a critical // optimization since sizeModel determination often requires knowing the // sizeModel of the ownerCt. If this weren't cached as we descend, this // would be an O(N^2) operation! (where N=number of components, or 300+/- // in Themes) token = item.init(full, invalidateOptions); } if (skipLayout) { continue; } if (invalidateOptions) { me.processInvalidate(invalidateOptions, item, 'before'); } // Allow the component layout a chance to effect its size model before we // recurse down the component hierarchy (since children need to know the // size model of their ownerCt). if (componentLayout.beforeLayoutCycle) { componentLayout.beforeLayoutCycle(item); } if (layout && layout.beforeLayoutCycle) { // allow the container layout take a peek as well. Table layout can // influence its children's styling due to the interaction of nesting // table-layout:fixed and auto inside each other without intervening // elements of known size. layout.beforeLayoutCycle(item); } // Finish up the item-level processing that is based on the size model of // the component. token = item.initContinue(token); // Start this state variable at true, since that is the value we want if // they do not apply (i.e., no work of this kind on which to wait). containerLayoutDone = true; // A ComponentLayout MUST implement getLayoutItems to allow its children // to be collected. Ext.container.Container does this, but non-Container // Components which manage Components as part of their structure (e.g., // HtmlEditor) must still return child Components via getLayoutItems. if (componentLayout.getLayoutItems) { componentLayout.renderChildren(); items = componentLayout.getLayoutItems(); if (items.length) { me.invalidate(items, true); } } if (layout) { containerLayoutDone = false; layout.renderChildren(); if (layout.needsItemSize || layout.activeItemCount) { // if the layout specified that it needs the layouts of its children // to run, or if the number of "liquid" child layouts is greater // than 0, we need to recurse into the children, since some or // all of them may need their layouts to run. items = layout.getVisibleItems(); if (items.length) { me.invalidate(items, true); } } } // Finish the processing that requires the size models of child items to // be determined (and some misc other stuff). item.initDone(containerLayoutDone); // Inform the layouts that we are about to begin (or begin again) now that // the size models of the component and its children are setup. me.resetLayout(componentLayout, item, firstTime); if (layout) { me.resetLayout(layout, item, firstTime); } // This has to occur after the component layout has had a chance to begin // so that we can determine what kind of animation might be needed. TODO- // move this determination into the layout itself. item.initAnimation(); if (invalidateOptions) { me.processInvalidate(invalidateOptions, item, 'after'); } } } me.currentLayout = null; }, // Returns true is descendant is a descendant of ancestor isDescendant: function(ancestor, descendant) { if (ancestor.isContainer) { for (var c = descendant.ownerCt; c; c = c.ownerCt) { if (c === ancestor) { return true; } } } return false; }, layoutDone: function (layout) { var ownerContext = layout.ownerContext; layout.running = false; // Once a component layout completes, we can mark it as "done". if (layout.isComponentLayout) { if (ownerContext.measuresBox) { ownerContext.onBoxMeasured(); // be sure to release our boxParent } ownerContext.setProp('done', true); } else { ownerContext.setProp('containerLayoutDone', true); } --this.remainingLayouts; ++this.progressCount; // a layout completion is progress }, newQueue: function () { return new Ext.util.Queue(); }, processInvalidate: function (options, item, name) { // When calling a callback, the currentLayout needs to be adjusted so // that whichever layout caused the invalidate is the currentLayout... if (options[name]) { var me = this, currentLayout = me.currentLayout; me.currentLayout = options.layout || null; options[name](item, options); me.currentLayout = currentLayout; } }, /** * Queues a ContextItem to have its {@link Ext.layout.ContextItem#flushAnimations} method called. * * @param {Ext.layout.ContextItem} item * @private */ queueAnimation: function (item) { this.animateQueue.add(item); }, /** * Queues a layout to have its {@link Ext.layout.Layout#completeLayout} method called. * * @param {Ext.layout.Layout} layout * @private */ queueCompletion: function (layout) { this.completionQueue.add(layout); }, /** * Queues a layout to have its {@link Ext.layout.Layout#finalizeLayout} method called. * * @param {Ext.layout.Layout} layout * @private */ queueFinalize: function (layout) { this.finalizeQueue.add(layout); }, /** * Queues a ContextItem for the next flush to the DOM. This should only be called by * the {@link Ext.layout.ContextItem} class. * * @param {Ext.layout.ContextItem} item * @private */ queueFlush: function (item) { this.flushQueue.add(item); }, chainFns: function (oldOptions, newOptions, funcName) { var me = this, oldLayout = oldOptions.layout, newLayout = newOptions.layout, oldFn = oldOptions[funcName], newFn = newOptions[funcName]; // Call newFn last so it can get the final word on things... also, the "this" // pointer will be passed correctly by createSequence with oldFn first. return function (contextItem) { var prev = me.currentLayout; if (oldFn) { me.currentLayout = oldLayout; oldFn.call(oldOptions.scope || oldOptions, contextItem, oldOptions); } me.currentLayout = newLayout; newFn.call(newOptions.scope || newOptions, contextItem, newOptions); me.currentLayout = prev; }; }, purgeInvalidates: function () { var me = this, newQueue = [], oldQueue = me.invalidQueue, oldLength = oldQueue.length, oldIndex, newIndex, newEntry, newComp, oldEntry, oldComp, keep; for (oldIndex = 0; oldIndex < oldLength; ++oldIndex) { oldEntry = oldQueue[oldIndex]; oldComp = oldEntry.item.target; keep = true; for (newIndex = newQueue.length; newIndex--;) { newEntry = newQueue[newIndex]; newComp = newEntry.item.target; if (oldComp.isLayoutChild(newComp)) { keep = false; break; } if (newComp.isLayoutChild(oldComp)) { Ext.Array.erase(newQueue, newIndex, 1); } } if (keep) { newQueue.push(oldEntry); } } me.invalidQueue = newQueue; }, /** * Queue a component (and its tree) to be invalidated on the next cycle. * * @param {Ext.Component/Ext.layout.ContextItem} item The component or ContextItem to invalidate. * @param {Object} options An object describing how to handle the invalidation (see * {@link Ext.layout.ContextItem#invalidate} for details). * @private */ queueInvalidate: function (item, options) { var me = this, newQueue = [], oldQueue = me.invalidQueue, index = oldQueue.length, comp, old, oldComp, oldOptions, oldState; if (item.isComponent) { item = me.getCmp(comp = item); } else { comp = item.target; } item.invalid = true; // See if comp is contained by any component already in the queue (ignore comp if // that is the case). Eliminate any components in the queue that are contained by // comp (by not adding them to newQueue). while (index--) { old = oldQueue[index]; oldComp = old.item.target; if (!comp.isFloating && comp.up(oldComp)) { return; // oldComp contains comp, so this invalidate is redundant } if (oldComp === comp) { // if already in the queue, update the options... if (!(oldOptions = old.options)) { old.options = options; } else if (options) { if (options.widthModel) { oldOptions.widthModel = options.widthModel; } if (options.heightModel) { oldOptions.heightModel = options.heightModel; } if (!(oldState = oldOptions.state)) { oldOptions.state = options.state; } else if (options.state) { Ext.apply(oldState, options.state); } if (options.before) { oldOptions.before = me.chainFns(oldOptions, options, 'before'); } if (options.after) { oldOptions.after = me.chainFns(oldOptions, options, 'after'); } } // leave the old queue alone now that we've update this comp's entry... return; } if (!oldComp.isLayoutChild(comp)) { newQueue.push(old); // comp does not contain oldComp } // else if (oldComp isDescendant of comp) skip } // newQueue contains only those components not a descendant of comp // to get here, comp must not be a child of anything already in the queue, so it // needs to be added along with its "options": newQueue.push({ item: item, options: options }); me.invalidQueue = newQueue; }, queueItemLayouts: function (item) { var comp = item.isComponent ? item : item.target, layout = comp.componentLayout; if (!layout.pending && !layout.invalid && !layout.done) { this.queueLayout(layout); } layout = comp.layout; if (layout && !layout.pending && !layout.invalid && !layout.done && !comp.collapsed) { this.queueLayout(layout); } }, /** * Queues a layout for the next calculation cycle. This should not be called if the * layout is done, blocked or already in the queue. The only classes that should call * this method are this class and {@link Ext.layout.ContextItem}. * * @param {Ext.layout.Layout} layout The layout to add to the queue. * @private */ queueLayout: function (layout) { this.layoutQueue.add(layout); layout.pending = true; }, /** * Removes the ContextItem for an element from the cache and from the parent's * "children" array. * @param {Ext.layout.ContextItem} parent * @param {Ext.dom.Element} el */ removeEl: function (parent, el) { var id = el.id, children = parent.children, items = this.items; if(children) { Ext.Array.remove(children, items[id]); } delete items[id]; }, /** * Resets the given layout object. This is called at the start of the run and can also * be called during the run by calling {@link #invalidate}. */ resetLayout: function (layout, ownerContext, firstTime) { var me = this; me.currentLayout = layout; layout.done = false; layout.pending = true; layout.firedTriggers = 0; me.layoutQueue.add(layout); if (firstTime) { me.layouts[layout.id] = layout; // track the layout for this run by its id layout.running = true; if (layout.finishedLayout) { me.finishQueue.add(layout); } // reset or update per-run counters: ++me.remainingLayouts; ++layout.layoutCount; // the number of whole layouts run for the layout layout.ownerContext = ownerContext; layout.beginCount = 0; // the number of beginLayout calls layout.blockCount = 0; // the number of blocks set for the layout layout.calcCount = 0; // the number of times calculate is called layout.triggerCount = 0; // the number of triggers set for the layout if (!layout.initialized) { layout.initLayout(); } layout.beginLayout(ownerContext); } else { ++layout.beginCount; if (!layout.running) { // back into the mahem with this one: ++me.remainingLayouts; layout.running = true; if (layout.isComponentLayout) { // this one is fun... if we call setProp('done', false) that would still // trigger/unblock layouts, but what layouts are really looking for with // this property is for it to go to true, not just be set to a value... ownerContext.unsetProp('done'); } // and it needs to be removed from the completion and/or finalize queues... me.completionQueue.remove(layout); me.finalizeQueue.remove(layout); } } layout.beginLayoutCycle(ownerContext, firstTime); }, /** * Runs the layout calculations. This can be called only once on this object. * @return {Boolean} True if all layouts were completed, false if not. */ run: function () { var me = this, flushed = false, watchDog = me.cycleWatchDog; me.purgeInvalidates(); me.flushInvalidates(); me.state = 1; me.totalCount = me.layoutQueue.getCount(); // We may start with unflushed data placed by beginLayout calls. Since layouts may // use setProp as a convenience, even in a write phase, we don't want to transition // to a read phase with unflushed data since we can write it now "cheaply". Also, // these value could easily be needed in the DOM in order to really get going with // the calculations. In particular, fixed (configured) dimensions fall into this // category. me.flush(); // While we have layouts that have not completed... while ((me.remainingLayouts || me.invalidQueue.length) && watchDog--) { if (me.invalidQueue.length) { me.flushInvalidates(); } // if any of them can run right now, run them if (me.runCycle()) { flushed = false; // progress means we probably need to flush something // but not all progress appears in the flushQueue (e.g. 'contentHeight') } else if (!flushed) { // as long as we are making progress, flush updates to the DOM and see if // that triggers or unblocks any layouts... me.flush(); flushed = true; // all flushed now, so more progress is required me.flushLayouts('completionQueue', 'completeLayout'); } else if (!me.invalidQueue.length) { // after a flush, we must make progress or something is WRONG me.state = 2; break; } if (!(me.remainingLayouts || me.invalidQueue.length)) { me.flush(); me.flushLayouts('completionQueue', 'completeLayout'); me.flushLayouts('finalizeQueue', 'finalizeLayout'); } } return me.runComplete(); }, runComplete: function () { var me = this; me.state = 2; if (me.remainingLayouts) { me.handleFailure(); return false; } me.flush(); // Call finishedLayout on all layouts, but do not clear the queue. me.flushLayouts('finishQueue', 'finishedLayout', true); // Call notifyOwner on all layouts and then clear the queue. me.flushLayouts('finishQueue', 'notifyOwner'); me.flush(); // in case any setProp calls were made me.flushAnimations(); return true; }, /** * Performs one layout cycle by calling each layout in the layout queue. * @return {Boolean} True if some progress was made, false if not. * @protected */ runCycle: function () { var me = this, layouts = me.layoutQueue.clear(), length = layouts.length, i; ++me.cycleCount; // This value is incremented by ContextItem#setProp whenever new values are set // (thereby detecting forward progress): me.progressCount = 0; for (i = 0; i < length; ++i) { me.runLayout(me.currentLayout = layouts[i]); } me.currentLayout = null; return me.progressCount > 0; }, /** * Runs one layout as part of a cycle. * @private */ runLayout: function (layout) { var me = this, ownerContext = me.getCmp(layout.owner); layout.pending = false; if (ownerContext.state.blocks) { return; } // We start with the assumption that the layout will finish and if it does not, it // must clear this flag. It turns out this is much simpler than knowing when a layout // is done (100% correctly) when base classes and derived classes are collaborating. // Knowing that some part of the layout is not done is much more obvious. layout.done = true; ++layout.calcCount; ++me.calcCount; layout.calculate(ownerContext); if (layout.done) { me.layoutDone(layout); if (layout.completeLayout) { me.queueCompletion(layout); } if (layout.finalizeLayout) { me.queueFinalize(layout); } } else if (!layout.pending && !layout.invalid && !(layout.blockCount + layout.triggerCount - layout.firedTriggers)) { // jshint ignore:line // A layout that is not done and has no blocks or triggers that will queue it // automatically, must be queued now: me.queueLayout(layout); } }, /** * Set the size of a component, element or composite or an array of components or elements. * @param {Ext.Component/Ext.Component[]/Ext.dom.Element/Ext.dom.Element[]/Ext.dom.CompositeElement} item * The item(s) to size. * @param {Number} width The new width to set (ignored if undefined or NaN). * @param {Number} height The new height to set (ignored if undefined or NaN). */ setItemSize: function(item, width, height) { var items = item, len = 1, contextItem, i; // NOTE: we don't pre-check for validity because: // - maybe only one dimension is valid // - the diagnostics layer will track the setProp call to help find who is trying // (but failing) to set a property // - setProp already checks this anyway if (item.isComposite) { items = item.elements; len = items.length; item = items[0]; } else if (!item.dom && !item.el) { // array by process of elimination len = items.length; item = items[0]; } // else len = 1 and items = item (to avoid error on "items[++i]") for (i = 0; i < len; ) { contextItem = this.get(item); contextItem.setSize(width, height); item = items[++i]; // this accomodation avoids making an array of 1 } }, //------------------------------------------------------------------------- // Diagnostics debugHooks: { $enabled: false, // off by default pageAnalyzerMode: true, logOn: { //boxParent: true, //calculate: true, //cancelComponent: true, //cancelLayout: true, //doInvalidate: true, //flush: true, //flushInvalidate: true, //invalidate: true, //initItem: true, //layoutDone: true, //queueLayout: true, //resetLayout: true, //runCycle: true, //setProp: true, 0:0 }, //profileLayoutsByType: true, //reportOnSuccess: true, cancelComponent: function (comp) { if (this.logOn.cancelComponent) { Ext.log('cancelCmp: ', comp.id); } this.callParent(arguments); }, cancelLayout: function (layout) { if (this.logOn.cancelLayout) { Ext.log('cancelLayout: ', this.getLayoutName(layout)); } this.callParent(arguments); }, callLayout: function (layout, methodName) { var accum = this.accumByType[layout.type], frame = accum && accum.enter(); this.callParent(arguments); if (accum) { frame.leave(); } }, checkRemainingLayouts: function () { var me = this, expected = 0, key, layout; for (key in me.layouts) { layout = me.layouts[key]; if (me.layouts.hasOwnProperty(key) && layout.running) { ++expected; } } if (me.remainingLayouts !== expected) { Ext.Error.raise({ msg: 'Bookkeeping error me.remainingLayouts' }); } }, flush: function () { if (this.logOn.flush) { var items = this.flushQueue; Ext.log('--- Flush ', items && items.getCount()); } return this.callParent(arguments); }, flushInvalidates: function () { if (this.logOn.flushInvalidate) { Ext.log('>> flushInvalidates'); } var ret = this.callParent(arguments); if (this.logOn.flushInvalidate) { Ext.log('<< flushInvalidates'); } return ret; }, getCmp: function (target) { var ret = this.callParent(arguments); if (!ret.wrapsComponent) { Ext.Error.raise({ msg: target.id + ' is not a component' }); } return ret; }, getEl: function (parent, target) { var ret = this.callParent(arguments); if (ret && ret.wrapsComponent) { Ext.Error.raise({ msg: parent.id + '/' + target.id + ' is a component (expected element)' }); } return ret; }, getLayoutName: function (layout) { return layout.owner.id + '<' + layout.type + '>'; }, layoutDone: function (layout) { var me = this, name = me.getLayoutName(layout); if (me.logOn.layoutDone) { Ext.log('layoutDone: ', name, ' ( ', me.remainingLayouts, ' running)'); } if (!layout.running) { Ext.Error.raise({ msg: name + ' is already done' }); } if (!me.remainingLayouts) { Ext.Error.raise({ msg: name + ' finished but no layouts are running' }); } me.callParent(arguments); }, layoutTreeHasFailures: function (layout, reported) { var me = this; function hasFailure (lo) { var failure = !lo.done, key, childLayout; if (lo.done) { for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { childLayout = me.layouts[key]; if (childLayout.owner.ownerLayout === lo) { if (hasFailure(childLayout)) { failure = true; } } } } } return failure; } if (hasFailure(layout)) { return true; } function markReported (lo) { var key, childLayout; reported[lo.id] = 1; for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { childLayout = me.layouts[key]; if (childLayout.owner.ownerLayout === lo) { markReported(childLayout); } } } } markReported(layout); return false; }, queueLayout: function (layout) { if (layout.done || layout.blockCount || layout.pending) { Ext.Error.raise({ msg: this.getLayoutName(layout) + ' should not be queued for layout' }); } if (this.logOn.queueLayout) { Ext.log('Queue ', this.getLayoutName(layout)); } return this.callParent(arguments); }, reportLayoutResult: function (layout, reported) { var me = this, owner = layout.owner, ownerContext = me.getCmp(owner), blockedBy = [], triggeredBy = [], key, value, i, length, childLayout, item, setBy, info; reported[layout.id] = 1; for (key in layout.blockedBy) { if (layout.blockedBy.hasOwnProperty(key)) { blockedBy.push(layout.blockedBy[key]); } } blockedBy.sort(); for (key in me.triggersByLayoutId[layout.id]) { if (me.triggersByLayoutId[layout.id].hasOwnProperty(key)) { value = me.triggersByLayoutId[layout.id][key]; triggeredBy.push({ name: key, info: value }); } } triggeredBy.sort(function (a, b) { return a.name < b.name ? -1 : (b.name < a.name ? 1 : 0); }); Ext.log({indent: 1}, (layout.done ? '++' : '--'), me.getLayoutName(layout), (ownerContext.isBoxParent ? ' [isBoxParent]' : ''), (ownerContext.boxChildren ? ' - boxChildren: ' + ownerContext.state.boxesMeasured + '/' + ownerContext.boxChildren.length : ''), ownerContext.boxParent ? (' - boxParent: ' + ownerContext.boxParent.id) : '', ' - size: ', ownerContext.widthModel.name, '/', ownerContext.heightModel.name); if (!layout.done || me.reportOnSuccess) { if (blockedBy.length) { ++Ext.log.indent; Ext.log({indent: 1}, 'blockedBy: count=',layout.blockCount); length = blockedBy.length; for (i = 0; i < length; i++) { Ext.log(blockedBy[i]); } Ext.log.indent -= 2; } if (triggeredBy.length) { ++Ext.log.indent; Ext.log({indent: 1}, 'triggeredBy: count='+layout.triggerCount); length = triggeredBy.length; for (i = 0; i < length; i++) { info = value.info || value; item = info.item; setBy = (item.setBy && item.setBy[info.name]) || '?'; value = triggeredBy[i]; Ext.log( value.name, ' (', item.props[info.name], ') dirty: ', (item.dirty ? !!item.dirty[info.name] : false), ', setBy: ', setBy ); } Ext.log.indent -= 2; } } for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { childLayout = me.layouts[key]; if (!childLayout.done && childLayout.owner.ownerLayout === layout) { me.reportLayoutResult(childLayout, reported); } } } for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { childLayout = me.layouts[key]; if (childLayout.done && childLayout.owner.ownerLayout === layout) { me.reportLayoutResult(childLayout, reported); } } } --Ext.log.indent; }, resetLayout: function (layout) { var me = this, type = layout.type, name = me.getLayoutName(layout), accum = me.accumByType[type], frame; if (me.logOn.resetLayout) { Ext.log('resetLayout: ', name, ' ( ', me.remainingLayouts, ' running)'); } if (!me.state) { // if (first time ... before run) if (!accum && me.profileLayoutsByType) { me.accumByType[type] = accum = Ext.Perf.get('layout_' + layout.type); } me.numByType[type] = (me.numByType[type] || 0) + 1; } frame = accum && accum.enter(); me.callParent(arguments); if (accum) { frame.leave(); } me.checkRemainingLayouts(); }, round: function (t) { return Math.round(t * 1000) / 1000; }, run: function () { var me = this, ret, time, key, i, layout, boxParent, children, n, reported, unreported, calcs, total, calcsLength, calc; me.accumByType = {}; me.calcsByType = {}; me.numByType = {}; me.timesByType = {}; me.triggersByLayoutId = {}; Ext.log.indentSize = 3; Ext.log('==================== LAYOUT ===================='); time = Ext.perf.getTimestamp(); ret = me.callParent(arguments); time = Ext.perf.getTimestamp() - time; if (me.logOn.boxParent && me.boxParents) { for (key in me.boxParents) { if (me.boxParents.hasOwnProperty(key)) { boxParent = me.boxParents[key]; children = boxParent.boxChildren; n = children.length; Ext.log('boxParent: ', boxParent.id); for (i = 0; i < n; ++i) { Ext.log(' --> ', children[i].id); } } } } if (ret) { Ext.log('----------------- SUCCESS -----------------'); } else { Ext.log( {level: 'error' }, '----------------- FAILURE -----------------' ); } for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { layout = me.layouts[key]; if (layout.running) { Ext.log.error('Layout left running: ', me.getLayoutName(layout)); } if (layout.ownerContext) { Ext.log.error('Layout left connected: ', me.getLayoutName(layout)); } } } if (!ret || me.reportOnSuccess) { reported = {}; unreported = 0; for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { layout = me.layouts[key]; if (me.items[layout.owner.el.id].isTopLevel) { if (me.reportOnSuccess || me.layoutTreeHasFailures(layout, reported)) { me.reportLayoutResult(layout, reported); } } } } // Just in case we missed any layouts... for (key in me.layouts) { if (me.layouts.hasOwnProperty(key)) { layout = me.layouts[key]; if (!reported[layout.id]) { if (!unreported) { Ext.log('----- Unreported!! -----'); } ++unreported; me.reportLayoutResult(layout, reported); } } } } Ext.log('Cycles: ', me.cycleCount, ', Flushes: ', me.flushCount, ', Calculates: ', me.calcCount, ' in ', me.round(time), ' msec'); Ext.log('Calculates by type:'); /*Ext.Object.each(me.numByType, function (type, total) { Ext.log(type, ': ', total, ' in ', me.calcsByType[type], ' tries (', Math.round(me.calcsByType[type] / total * 10) / 10, 'x) at ', me.round(me.timesByType[type]), ' msec (avg ', me.round(me.timesByType[type] / me.calcsByType[type]), ' msec)'); });*/ calcs = []; for (key in me.numByType) { if (me.numByType.hasOwnProperty(key)) { total = me.numByType[key]; calcs.push({ type : key, total : total, calcs : me.calcsByType[key], multiple : Math.round(me.calcsByType[key] / total * 10) / 10, calcTime : me.round(me.timesByType[key]), avgCalcTime: me.round(me.timesByType[key] / me.calcsByType[key]) }); } } calcs.sort(function (a,b) { return b.calcTime - a.calcTime; }); calcsLength = calcs.length; for (i=0; i<calcsLength; i++) { calc = calcs[i]; Ext.log( calc.type, ': ', calc.total, ' in ', calc.calcs, ' tries (', calc.multiple, 'x) at ', calc.calcTime, ' msec (avg ', calc.avgCalcTime, ' msec)' ); } return ret; }, runCycle: function () { if (this.logOn.runCycle) { Ext.log('>>> Cycle ', this.cycleCount, ' (queue length: ', this.layoutQueue.length, ')'); } return this.callParent(arguments); }, runLayout: function (layout) { var me = this, type = layout.type, accum = me.accumByType[type], frame, ret, time; if (me.logOn.calculate) { Ext.log('-- calculate ', this.getLayoutName(layout)); } frame = accum && accum.enter(); time = Ext.perf.getTimestamp(); ret = me.callParent(arguments); time = Ext.perf.getTimestamp() - time; if (accum) { frame.leave(); } me.calcsByType[type] = (me.calcsByType[type] || 0) + 1; me.timesByType[type] = (me.timesByType[type] || 0) + time; /* add a / to the front of this line to enable layout completion logging if (layout.done) { var ownerContext = me.getCmp(layout.owner), props = ownerContext.props; if (layout.isComponentLayout) { Ext.log('complete ', layout.owner.id, ':', type, ' w=',props.width, ' h=', props.height); } else { Ext.log('complete ', layout.owner.id, ':', type, ' cw=',props.contentWidth, ' ch=', props.contentHeight); } }**/ return ret; } } // End Diagnostics });