/*
* This file is part of the Echo Web Application Framework (hereinafter "Echo").
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
package nextapp.echo2.webcontainer.syncpeer;
import nextapp.echo2.app.FillImage;
import nextapp.echo2.app.Color;
import nextapp.echo2.app.Component;
import nextapp.echo2.app.Extent;
import nextapp.echo2.app.Font;
import nextapp.echo2.app.ImageReference;
import nextapp.echo2.app.LayoutData;
import nextapp.echo2.app.LayoutDirection;
import nextapp.echo2.app.Pane;
import nextapp.echo2.app.SplitPane;
import nextapp.echo2.app.layout.SplitPaneLayoutData;
import nextapp.echo2.app.update.ServerComponentUpdate;
import nextapp.echo2.webcontainer.ContainerInstance;
import nextapp.echo2.webcontainer.PartialUpdateManager;
import nextapp.echo2.webcontainer.PartialUpdateParticipant;
import nextapp.echo2.webcontainer.PropertyUpdateProcessor;
import nextapp.echo2.webcontainer.RenderContext;
import nextapp.echo2.webcontainer.ComponentSynchronizePeer;
import nextapp.echo2.webcontainer.RenderState;
import nextapp.echo2.webcontainer.SynchronizePeerFactory;
import nextapp.echo2.webcontainer.image.ImageRenderSupport;
import nextapp.echo2.webcontainer.propertyrender.AlignmentRender;
import nextapp.echo2.webcontainer.propertyrender.ColorRender;
import nextapp.echo2.webcontainer.propertyrender.ExtentRender;
import nextapp.echo2.webcontainer.propertyrender.FillImageRender;
import nextapp.echo2.webcontainer.propertyrender.FontRender;
import nextapp.echo2.webcontainer.propertyrender.InsetsRender;
import nextapp.echo2.webrender.ServerMessage;
import nextapp.echo2.webrender.Service;
import nextapp.echo2.webrender.WebRenderServlet;
import nextapp.echo2.webrender.output.CssStyle;
import nextapp.echo2.webrender.servermessage.DomUpdate;
import nextapp.echo2.webrender.service.JavaScriptService;
import org.w3c.dom.Element;
/**
* Synchronization peer for <code>nextapp.echo2.app.SplitPane</code> components.
* <p>
* This class should not be extended or used by classes outside of the
* Echo framework.
*/
public class SplitPanePeer
implements ImageRenderSupport, PropertyUpdateProcessor, ComponentSynchronizePeer {
private static final String IMAGE_ID_HORIZONTAL_SEPARATOR = "horizontalSeparator";
private static final String IMAGE_ID_PANE_0_BACKGROUND = "pane0Background";
private static final String IMAGE_ID_PANE_1_BACKGROUND = "pane1Background";
private static final String IMAGE_ID_VERTICAL_SEPARATOR = "verticalSeparator";
private static final Extent DEFAULT_SEPARATOR_POSITION = new Extent(100);
/**
* <code>RenderState</code> implementation.
*/
static class RenderStateImpl
implements RenderState {
/**
* The pane which was rendered at index 0.
*/
private String pane0;
/**
* The pane which was rendered at index 1.
*/
private String pane1;
/**
* Creates a new <code>RenderState</code> based on the state of the
* given <code>splitPane</code>.
*
* @param splitPane the split pane
*/
private RenderStateImpl(SplitPane splitPane) {
int componentCount = splitPane.getVisibleComponentCount();
pane0 = (componentCount < 1 || splitPane.getVisibleComponent(0) == null)
? null : ContainerInstance.getElementId(splitPane.getVisibleComponent(0));
pane1 = (componentCount < 2 || splitPane.getVisibleComponent(1) == null)
? null : ContainerInstance.getElementId(splitPane.getVisibleComponent(1));
}
}
/**
* Service to provide supporting JavaScript library.
*/
private static final Service SPLIT_PANE_SERVICE = JavaScriptService.forResource("Echo.SplitPane",
"/nextapp/echo2/webcontainer/resource/js/SplitPane.js");
static {
WebRenderServlet.getServiceRegistry().add(SPLIT_PANE_SERVICE);
}
/**
* Utility method to evaluate equality of objects in a null-safe fashion.
*/
private static final boolean equal(Object a, Object b) {
return a == b || (a != null && a.equals(b));
}
/**
* <code>PartialUpdateParticipant</code> to update position of separator.
*/
private PartialUpdateParticipant separatorPositionUpdate = new PartialUpdateParticipant() {
/**
* @see nextapp.echo2.webcontainer.PartialUpdateParticipant#renderProperty(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate)
*/
public void renderProperty(RenderContext rc, ServerComponentUpdate update) {
SplitPane splitPane = (SplitPane) update.getParent();
renderSetSeparatorPositionDirective(rc, splitPane);
}
/**
* @see nextapp.echo2.webcontainer.PartialUpdateParticipant#canRenderProperty(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate)
*/
public boolean canRenderProperty(RenderContext rc, ServerComponentUpdate update) {
return true;
}
};
private PartialUpdateManager partialUpdateManager;
/**
* Default constructor.
*/
public SplitPanePeer() {
super();
partialUpdateManager = new PartialUpdateManager();
partialUpdateManager.add(SplitPane.PROPERTY_SEPARATOR_POSITION, separatorPositionUpdate);
}
/**
* Calculates the pixel size of the separator.
*
* @param splitPane the <code>SplitPane</code> to evaluate
* @return the size of the separator in pixels
*/
private int calculateSeparatorSize(SplitPane splitPane) {
Boolean booleanValue = (Boolean) splitPane.getRenderProperty(SplitPane.PROPERTY_RESIZABLE);
boolean resizable = booleanValue == null ? false : booleanValue.booleanValue();
boolean verticalOrientation = isOrientationVertical(splitPane);
if (resizable) {
return ExtentRender.toPixels((Extent) splitPane.getRenderProperty(
verticalOrientation ? SplitPane.PROPERTY_SEPARATOR_HEIGHT : SplitPane.PROPERTY_SEPARATOR_WIDTH), 4);
} else {
return ExtentRender.toPixels((Extent) splitPane.getRenderProperty(
verticalOrientation ? SplitPane.PROPERTY_SEPARATOR_HEIGHT : SplitPane.PROPERTY_SEPARATOR_WIDTH), 0);
}
}
/**
* @see nextapp.echo2.webcontainer.ComponentSynchronizePeer#getContainerId(nextapp.echo2.app.Component)
*/
public String getContainerId(Component child) {
return ContainerInstance.getElementId(child.getParent()) + "_pane" + child.getParent().visibleIndexOf(child);
}
/**
* @see nextapp.echo2.webcontainer.image.ImageRenderSupport#getImage(nextapp.echo2.app.Component, java.lang.String)
*/
public ImageReference getImage(Component component, String imageId) {
if (IMAGE_ID_PANE_0_BACKGROUND.equals(imageId)) {
return getPaneBackgroundImage(component.getVisibleComponent(0));
} else if (IMAGE_ID_PANE_1_BACKGROUND.equals(imageId)) {
return getPaneBackgroundImage(component.getVisibleComponent(1));
} else if (IMAGE_ID_HORIZONTAL_SEPARATOR.equals(imageId)) {
FillImage fillImage = (FillImage) component.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_HORIZONTAL_IMAGE);
return fillImage == null ? null : fillImage.getImage();
} else if (IMAGE_ID_VERTICAL_SEPARATOR.equals(imageId)) {
FillImage fillImage = (FillImage) component.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_VERTICAL_IMAGE);
return fillImage == null ? null : fillImage.getImage();
} else {
return null;
}
}
/**
* Retrieves the <code>ImageReference</code> of the background image
* defined in the layout data of the specified component (pane).
* Returns null if the image cannot be retrieved for any reason.
*
* @param component the child pane component
* @return the background image
*/
private ImageReference getPaneBackgroundImage(Component component) {
LayoutData layoutData = (LayoutData) component.getRenderProperty(SplitPane.PROPERTY_LAYOUT_DATA);
if (!(layoutData instanceof SplitPaneLayoutData)) {
return null;
}
FillImage backgroundImage = ((SplitPaneLayoutData) layoutData).getBackgroundImage();
if (backgroundImage == null) {
return null;
}
return backgroundImage.getImage();
}
/**
* Determines the rendered orientation of the SplitPane, converting leading/trailing orientations to left/right
* orientations based on layout direction.
*
* @param splitPane the <code>SplitPane</code>
* @return the rendered orientation
*/
private int getRenderOrientation(SplitPane splitPane) {
Integer orientationValue = (Integer) splitPane.getRenderProperty(SplitPane.PROPERTY_ORIENTATION);
int orientation = orientationValue == null ? SplitPane.ORIENTATION_HORIZONTAL_LEADING_TRAILING
: orientationValue.intValue();
if (orientation == SplitPane.ORIENTATION_HORIZONTAL_LEADING_TRAILING
|| orientation == SplitPane.ORIENTATION_HORIZONTAL_TRAILING_LEADING) {
LayoutDirection layoutDirection = splitPane.getRenderLayoutDirection();
if (orientation == SplitPane.ORIENTATION_HORIZONTAL_LEADING_TRAILING) {
orientation = layoutDirection.isLeftToRight() ? SplitPane.ORIENTATION_HORIZONTAL_LEFT_RIGHT
: SplitPane.ORIENTATION_HORIZONTAL_RIGHT_LEFT;
} else {
orientation = layoutDirection.isLeftToRight() ? SplitPane.ORIENTATION_HORIZONTAL_RIGHT_LEFT
: SplitPane.ORIENTATION_HORIZONTAL_LEFT_RIGHT;
}
}
return orientation;
}
/**
* Determines if the orientation of a <code>SplitPane</code> is horizontal
* or vertical.
*
* @param splitPane the <code>SplitPane</code> to analyze
* @return true if the orientation is vertical, false if it is horizontal
*/
private boolean isOrientationVertical(SplitPane splitPane) {
Integer orientationValue = (Integer) splitPane.getRenderProperty(SplitPane.PROPERTY_ORIENTATION);
int orientation = orientationValue == null ? SplitPane.ORIENTATION_HORIZONTAL : orientationValue.intValue();
return orientation == SplitPane.ORIENTATION_VERTICAL_TOP_BOTTOM ||
orientation == SplitPane.ORIENTATION_VERTICAL_BOTTOM_TOP;
}
/**
* @see nextapp.echo2.webcontainer.PropertyUpdateProcessor#processPropertyUpdate(
* nextapp.echo2.webcontainer.ContainerInstance, nextapp.echo2.app.Component, org.w3c.dom.Element)
*/
public void processPropertyUpdate(ContainerInstance ci, Component component, Element propertyElement) {
if ("separatorPosition".equals(propertyElement.getAttribute(PropertyUpdateProcessor.PROPERTY_NAME))) {
Extent newValue = ExtentRender.toExtent(propertyElement.getAttribute(PropertyUpdateProcessor.PROPERTY_VALUE));
ci.getUpdateManager().getClientUpdateManager().setComponentProperty(component,
SplitPane.PROPERTY_SEPARATOR_POSITION, newValue);
}
}
/**
* @see nextapp.echo2.webcontainer.ComponentSynchronizePeer#renderAdd(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate, java.lang.String, nextapp.echo2.app.Component)
*/
public void renderAdd(RenderContext rc, ServerComponentUpdate update, String targetId, Component component) {
ServerMessage serverMessage = rc.getServerMessage();
serverMessage.addLibrary(SPLIT_PANE_SERVICE.getId());
SplitPane splitPane = (SplitPane) component;
renderInitDirective(rc, splitPane, targetId);
Component[] children = splitPane.getVisibleComponents();
for (int i = 0; i < children.length; ++i) {
renderChild(rc, update, splitPane, children[i]);
}
updateRenderState(rc, splitPane);
}
/**
* Renders a directive to add a child component.
*
* @param rc the relevant <code>RenderContext</code>
* @param update the update
* @param splitPane the <code>SplitPane</code>
* @param index the index of the child to add
*/
private void renderAddChildDirective(RenderContext rc, ServerComponentUpdate update, SplitPane splitPane, int index) {
String elementId = ContainerInstance.getElementId(splitPane);
ServerMessage serverMessage = rc.getServerMessage();
Element partElement = serverMessage.addPart(ServerMessage.GROUP_ID_UPDATE, "EchoSplitPane.MessageProcessor");
Element addChildElement = serverMessage.getDocument().createElement("add-child");
addChildElement.setAttribute("eid", elementId);
addChildElement.setAttribute("index", Integer.toString(index));
Component child = splitPane.getVisibleComponent(index);
renderLayoutData(rc, addChildElement, child, index);
partElement.appendChild(addChildElement);
renderChild(rc, update, splitPane, child);
}
/**
* Renders child components which were added to a
* <code>SplitPane</code>, as described in the provided
* <code>ServerComponentUpdate</code>.
*
* @param rc the relevant <code>RenderContext</code>
* @param update the update
*/
private void renderAddChildren(RenderContext rc, ServerComponentUpdate update) {
SplitPane splitPane = (SplitPane) update.getParent();
RenderStateImpl currentRenderState = new RenderStateImpl(splitPane);
Component[] addedChildren = update.getAddedChildren();
for (int i = 0; i < addedChildren.length; i++) {
String id = ContainerInstance.getElementId(addedChildren[i]);
if (equal(id, currentRenderState.pane0)) {
renderAddChildDirective(rc, update, splitPane, 0);
} else if (equal(id, currentRenderState.pane1)) {
renderAddChildDirective(rc, update, splitPane, 1);
}
}
}
/**
* Renders an individual child component of the <code>SplitPane</code>.
*
* @param rc the relevant <code>RenderContext</code>
* @param update the <code>ServerComponentUpdate</code> being performed
* @param child The child <code>Component</code> to be rendered
*/
private void renderChild(RenderContext rc, ServerComponentUpdate update, SplitPane splitPane, Component child) {
ComponentSynchronizePeer syncPeer = SynchronizePeerFactory.getPeerForComponent(child.getClass());
syncPeer.renderAdd(rc, update, getContainerId(child), child);
}
/**
* @see nextapp.echo2.webcontainer.ComponentSynchronizePeer#renderDispose(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate, nextapp.echo2.app.Component)
*/
public void renderDispose(RenderContext rc, ServerComponentUpdate update, Component component) {
ServerMessage serverMessage = rc.getServerMessage();
serverMessage.addLibrary(SPLIT_PANE_SERVICE.getId());
renderDisposeDirective(rc, (SplitPane) component);
}
/**
* Renders a directive to the outgoing <code>ServerMessage</code> to
* dispose the state of a <code>SplitPane</code>, performing tasks such as
* unregistering event listeners on the client.
*
* @param rc the relevant <code>RenderContext</code>
* @param splitPane the <code>SplitPane</code>
*/
private void renderDisposeDirective(RenderContext rc, SplitPane splitPane) {
String elementId = ContainerInstance.getElementId(splitPane);
ServerMessage serverMessage = rc.getServerMessage();
Element initElement = serverMessage.appendPartDirective(ServerMessage.GROUP_ID_PREREMOVE,
"EchoSplitPane.MessageProcessor", "dispose");
initElement.setAttribute("eid", elementId);
}
/**
* Determines the separator position of the <code>SplitPane</code>.
*
* @param splitPane the <code>SplitPane</code>
* @return the separator position
*/
private int getSeparatorPosition(SplitPane splitPane) {
Extent separatorPosition = (Extent) splitPane.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_POSITION,
DEFAULT_SEPARATOR_POSITION);
return ExtentRender.toPixels(separatorPosition, 100);
}
/**
* Determines if the specified update has caused either child of the SplitPane to
* be relocated (i.e., a child which existed before continues to exist, but at a
* different index).
*
* @param rc the relevant <code>RenderContext</code>
* @param update the update
* @return true if any children have been relocated
*/
private boolean hasRelocatedChildren(RenderContext rc, ServerComponentUpdate update) {
ContainerInstance ci = rc.getContainerInstance();
SplitPane splitPane = (SplitPane) update.getParent();
RenderStateImpl previous = (RenderStateImpl) ci.getRenderState(splitPane);
if (previous == null) {
return false;
}
RenderStateImpl current = new RenderStateImpl(splitPane);
return (previous.pane0 != null && previous.pane0.equals(current.pane1))
|| (previous.pane1 != null && previous.pane1.equals(current.pane0));
}
/**
* Renders a directive to the outgoing <code>ServerMessage</code> to
* render a <code>SplitPane</code>.
*
* @param rc the relevant <code>RenderContext</code>
* @param splitPane the <code>SplitPane</code>
* @param targetId the id of the container element
*/
private void renderInitDirective(RenderContext rc, SplitPane splitPane, String targetId) {
String elementId = ContainerInstance.getElementId(splitPane);
boolean vertical = isOrientationVertical(splitPane);
ServerMessage serverMessage = rc.getServerMessage();
Element partElement = serverMessage.addPart(ServerMessage.GROUP_ID_UPDATE, "EchoSplitPane.MessageProcessor");
Element initElement = serverMessage.getDocument().createElement("init");
initElement.setAttribute("container-eid", targetId);
initElement.setAttribute("eid", elementId);
initElement.setAttribute("position", Integer.toString(getSeparatorPosition(splitPane)));
int orientation = getRenderOrientation(splitPane);
switch (orientation) {
case SplitPane.ORIENTATION_HORIZONTAL_LEFT_RIGHT:
initElement.setAttribute("orientation", "l-r");
break;
case SplitPane.ORIENTATION_HORIZONTAL_RIGHT_LEFT:
initElement.setAttribute("orientation", "r-l");
break;
case SplitPane.ORIENTATION_VERTICAL_TOP_BOTTOM:
initElement.setAttribute("orientation", "t-b");
break;
case SplitPane.ORIENTATION_VERTICAL_BOTTOM_TOP:
initElement.setAttribute("orientation", "b-t");
break;
default:
throw new IllegalStateException("Invalid orientation: " + orientation);
}
if (!splitPane.isRenderEnabled()) {
initElement.setAttribute("enabled", "false");
}
Color background = (Color) splitPane.getRenderProperty(SplitPane.PROPERTY_BACKGROUND);
if (background != null) {
initElement.setAttribute("background", ColorRender.renderCssAttributeValue(background));
}
Color foreground = (Color) splitPane.getRenderProperty(SplitPane.PROPERTY_FOREGROUND);
if (foreground != null) {
initElement.setAttribute("foreground", ColorRender.renderCssAttributeValue(foreground));
}
Font font = (Font) splitPane.getRenderProperty(SplitPane.PROPERTY_FONT);
if (font != null) {
CssStyle fontCssStyle = new CssStyle();
FontRender.renderToStyle(fontCssStyle, font);
initElement.setAttribute("font", fontCssStyle.renderInline());
}
Boolean booleanValue = (Boolean) splitPane.getRenderProperty(SplitPane.PROPERTY_RESIZABLE);
boolean resizable = booleanValue == null ? false : booleanValue.booleanValue();
initElement.setAttribute("resizable", resizable ? "true" : "false");
initElement.setAttribute("separator-size", Integer.toString(calculateSeparatorSize(splitPane)));
Color separatorColor = (Color) splitPane.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_COLOR);
if (separatorColor != null) {
initElement.setAttribute("separator-color", ColorRender.renderCssAttributeValue(separatorColor));
}
FillImage separatorImage = vertical
? (FillImage) splitPane.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_VERTICAL_IMAGE)
: (FillImage) splitPane.getRenderProperty(SplitPane.PROPERTY_SEPARATOR_HORIZONTAL_IMAGE);
if (separatorImage != null) {
CssStyle fillImageCssStyle = new CssStyle();
FillImageRender.renderToStyle(fillImageCssStyle, rc, this, splitPane,
vertical ? IMAGE_ID_VERTICAL_SEPARATOR : IMAGE_ID_HORIZONTAL_SEPARATOR, separatorImage, 0);
initElement.setAttribute("separator-image", fillImageCssStyle.renderInline());
}
Component[] children = splitPane.getVisibleComponents();
for (int i = 0; i < children.length; ++i) {
renderLayoutData(rc, initElement, children[i], i);
}
partElement.appendChild(initElement);
}
/**
* Renders layout data information for a child component.
*
* @param rc the relevant <code>RenderContext</code>
* @param containerElement the container element
* @param component the child component
* @param index the child index
*/
private void renderLayoutData(RenderContext rc, Element containerElement, Component component, int index) {
SplitPaneLayoutData layoutData = (SplitPaneLayoutData) component.getRenderProperty(SplitPane.PROPERTY_LAYOUT_DATA);
if (layoutData == null) {
return;
}
Element layoutDataElement = rc.getServerMessage().getDocument().createElement("layout-data");
layoutDataElement.setAttribute("index", Integer.toString(index));
if (layoutData.getAlignment() != null) {
CssStyle alignmentStyle = new CssStyle();
AlignmentRender.renderToStyle(alignmentStyle, layoutData.getAlignment(), component);
layoutDataElement.setAttribute("alignment", alignmentStyle.renderInline());
}
if (layoutData.getBackground() != null) {
layoutDataElement.setAttribute("background", ColorRender.renderCssAttributeValue(layoutData.getBackground()));
}
if (layoutData.getBackgroundImage() != null) {
CssStyle backgroundImageStyle = new CssStyle();
FillImageRender.renderToStyle(backgroundImageStyle, rc, this, component.getParent(),
index == 0 ? IMAGE_ID_PANE_0_BACKGROUND : IMAGE_ID_PANE_1_BACKGROUND, layoutData.getBackgroundImage(), 0);
layoutDataElement.setAttribute("background-image", backgroundImageStyle.renderInline());
}
if (!(component instanceof Pane) && layoutData.getInsets() != null) {
layoutDataElement.setAttribute("insets", InsetsRender.renderCssAttributeValue(layoutData.getInsets()));
}
switch (layoutData.getOverflow()) {
case SplitPaneLayoutData.OVERFLOW_AUTO:
layoutDataElement.setAttribute("overflow", "auto");
break;
case SplitPaneLayoutData.OVERFLOW_HIDDEN:
layoutDataElement.setAttribute("overflow", "hidden");
break;
case SplitPaneLayoutData.OVERFLOW_SCROLL:
layoutDataElement.setAttribute("overflow", "scroll");
break;
}
if (layoutData.getMinimumSize() != null) {
layoutDataElement.setAttribute("min-size", Integer.toString(ExtentRender.toPixels(layoutData.getMinimumSize(), -1)));
}
if (layoutData.getMaximumSize() != null) {
layoutDataElement.setAttribute("max-size", Integer.toString(ExtentRender.toPixels(layoutData.getMaximumSize(), -1)));
}
containerElement.appendChild(layoutDataElement);
}
/**
* Renders directives to remove children.
*
* @param rc the relevant <code>RenderContext</code>
* @param update the update
*/
private void renderRemoveChildren(RenderContext rc, ServerComponentUpdate update) {
ContainerInstance ci = rc.getContainerInstance();
SplitPane splitPane = (SplitPane) update.getParent();
RenderStateImpl previousRenderState = (RenderStateImpl) ci.getRenderState(splitPane);
Component[] removedChildren = update.getRemovedChildren();
for (int i = 0; i < removedChildren.length; i++) {
String id = ContainerInstance.getElementId(removedChildren[i]);
if (equal(id, previousRenderState.pane0)) {
renderRemoveChildDirective(rc, splitPane, 0);
} else if (equal(id, previousRenderState.pane1)) {
renderRemoveChildDirective(rc, splitPane, 1);
}
}
}
/**
* Renders a directive to remove a child component.
*
* @param rc the relevant <code>RenderContext</code>
* @param splitPane the <code>SplitPane</code>
* @param index the index of the child to remove
*/
private void renderRemoveChildDirective(RenderContext rc, SplitPane splitPane, int index) {
String elementId = ContainerInstance.getElementId(splitPane);
ServerMessage serverMessage = rc.getServerMessage();
Element partElement = serverMessage.addPart(ServerMessage.GROUP_ID_REMOVE, "EchoSplitPane.MessageProcessor");
Element removeChildElement = serverMessage.getDocument().createElement("remove-child");
removeChildElement.setAttribute("eid", elementId);
removeChildElement.setAttribute("index", Integer.toString(index));
partElement.appendChild(removeChildElement);
}
/**
* Renders a directive to set the separator position.
*
* @param rc the relevant <code>RenderContext</code>
* @param splitPane the <code>SplitPane</code>
*/
private void renderSetSeparatorPositionDirective(RenderContext rc, SplitPane splitPane) {
String elementId = ContainerInstance.getElementId(splitPane);
ServerMessage serverMessage = rc.getServerMessage();
Element partElement = serverMessage.addPart(ServerMessage.GROUP_ID_REMOVE, "EchoSplitPane.MessageProcessor");
Element setSeparatorPositionElement = serverMessage.getDocument().createElement("set-separator-position");
setSeparatorPositionElement.setAttribute("eid", elementId);
setSeparatorPositionElement.setAttribute("position", Integer.toString(getSeparatorPosition(splitPane)));
partElement.appendChild(setSeparatorPositionElement);
}
/**
* @see nextapp.echo2.webcontainer.ComponentSynchronizePeer#renderUpdate(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate, java.lang.String)
*/
public boolean renderUpdate(RenderContext rc, ServerComponentUpdate update, String targetId) {
boolean fullReplace = false;
if (update.hasUpdatedLayoutDataChildren()) {
fullReplace = true;
} else if (update.hasUpdatedProperties()) {
if (!partialUpdateManager.canProcess(rc, update)) {
fullReplace = true;
}
} else if (hasRelocatedChildren(rc, update)) {
fullReplace = true;
}
if (fullReplace) {
// Perform full update.
renderDisposeDirective(rc, (SplitPane) update.getParent());
DomUpdate.renderElementRemove(rc.getServerMessage(), ContainerInstance.getElementId(update.getParent()));
renderAdd(rc, update, targetId, update.getParent());
} else {
partialUpdateManager.process(rc, update);
if (update.hasAddedChildren() || update.hasRemovedChildren()) {
renderRemoveChildren(rc, update);
renderAddChildren(rc, update);
}
}
updateRenderState(rc, (SplitPane) update.getParent());
return fullReplace;
}
/**
* Update the stored <code>RenderState</code>.
*
* @param rc the relevant <code>RenderContext</code>
* @param splitPane the <code>SplitPane</code> component
*/
private void updateRenderState(RenderContext rc, SplitPane splitPane) {
rc.getContainerInstance().setRenderState(splitPane, new RenderStateImpl(splitPane));
}
}