/*
* 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 org.w3c.dom.DocumentFragment;
import org.w3c.dom.Element;
import nextapp.echo2.app.Alignment;
import nextapp.echo2.app.FillImage;
import nextapp.echo2.app.Border;
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.Insets;
import nextapp.echo2.app.TextArea;
import nextapp.echo2.app.text.TextComponent;
import nextapp.echo2.app.update.ServerComponentUpdate;
import nextapp.echo2.webcontainer.ActionProcessor;
import nextapp.echo2.webcontainer.ContainerInstance;
import nextapp.echo2.webcontainer.DomUpdateSupport;
import nextapp.echo2.webcontainer.FocusSupport;
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.image.ImageRenderSupport;
import nextapp.echo2.webcontainer.partialupdate.BorderUpdate;
import nextapp.echo2.webcontainer.partialupdate.ColorUpdate;
import nextapp.echo2.webcontainer.partialupdate.InsetsUpdate;
import nextapp.echo2.webcontainer.propertyrender.AlignmentRender;
import nextapp.echo2.webcontainer.propertyrender.FillImageRender;
import nextapp.echo2.webcontainer.propertyrender.BorderRender;
import nextapp.echo2.webcontainer.propertyrender.ColorRender;
import nextapp.echo2.webcontainer.propertyrender.ExtentRender;
import nextapp.echo2.webcontainer.propertyrender.FontRender;
import nextapp.echo2.webcontainer.propertyrender.InsetsRender;
import nextapp.echo2.webcontainer.propertyrender.LayoutDirectionRender;
import nextapp.echo2.webrender.ClientProperties;
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.servermessage.WindowUpdate;
import nextapp.echo2.webrender.service.JavaScriptService;
import nextapp.echo2.webrender.util.DomUtil;
/**
* Abstract base synchronization peer for the built-in
* <code>nextapp.echo2.app.text.TextComponent</code> -derived components.
* <p>
* This class should not be extended or used by classes outside of the Echo
* framework.
*/
public abstract class TextComponentPeer
implements ActionProcessor, ComponentSynchronizePeer, DomUpdateSupport, FocusSupport, ImageRenderSupport, PropertyUpdateProcessor {
private static final String IMAGE_ID_BACKGROUND = "background";
/**
* Service to provide supporting JavaScript library.
*/
static final Service TEXT_COMPONENT_SERVICE = JavaScriptService.forResource("Echo.TextComponent",
"/nextapp/echo2/webcontainer/resource/js/TextComponent.js");
static {
WebRenderServlet.getServiceRegistry().add(TEXT_COMPONENT_SERVICE);
}
/**
* A <code>PartialUpdateParticipant</code> to update the text of
* a text component.
*/
private class TextUpdate
implements PartialUpdateParticipant {
/**
* @see nextapp.echo2.webcontainer.PartialUpdateParticipant#canRenderProperty(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.update.ServerComponentUpdate)
*/
public boolean canRenderProperty(RenderContext rc, ServerComponentUpdate update) {
return true;
}
/**
* @see nextapp.echo2.webcontainer.PartialUpdateParticipant#renderProperty(
* nextapp.echo2.webcontainer.RenderContext, nextapp.echo2.app.update.ServerComponentUpdate)
*/
public void renderProperty(RenderContext rc, ServerComponentUpdate update) {
TextComponent textComponent = (TextComponent) update.getParent();
String elementId = ContainerInstance.getElementId(textComponent);
ServerMessage serverMessage = rc.getServerMessage();
Element itemizedUpdateElement = serverMessage.getItemizedDirective(ServerMessage.GROUP_ID_POSTUPDATE,
"EchoTextComponent.MessageProcessor", "set-text", new String[0], new String[0]);
Element itemElement = serverMessage.getDocument().createElement("item");
itemElement.setAttribute("eid", elementId);
itemElement.setAttribute("text", textComponent.getText());
itemizedUpdateElement.appendChild(itemElement);
}
}
private PartialUpdateManager partialUpdateManager;
/**
* Default constructor.
*/
public TextComponentPeer() {
partialUpdateManager = new PartialUpdateManager();
partialUpdateManager.add(TextComponent.PROPERTY_FOREGROUND,
new ColorUpdate(TextComponent.PROPERTY_FOREGROUND, null, ColorUpdate.CSS_COLOR));
partialUpdateManager.add(TextComponent.PROPERTY_BACKGROUND,
new ColorUpdate(TextComponent.PROPERTY_BACKGROUND, null, ColorUpdate.CSS_BACKGROUND_COLOR));
partialUpdateManager.add(TextComponent.PROPERTY_BORDER,
new BorderUpdate(TextComponent.PROPERTY_BORDER, null, BorderUpdate.CSS_BORDER));
partialUpdateManager.add(TextComponent.PROPERTY_INSETS,
new InsetsUpdate(TextComponent.PROPERTY_INSETS, null, InsetsUpdate.CSS_PADDING));
partialUpdateManager.add(TextComponent.TEXT_CHANGED_PROPERTY, new TextUpdate());
}
/**
* Creates a base <code>CssStyle</code> for properties common to text
* components.
*
* @param rc the relevant <code>RenderContext</code>
* @param textComponent the text component
* @return the style
*/
protected CssStyle createBaseCssStyle(RenderContext rc, TextComponent textComponent) {
CssStyle cssStyle = new CssStyle();
boolean renderEnabled = textComponent.isRenderEnabled();
Border border;
Color foreground, background;
Font font;
FillImage backgroundImage;
if (!renderEnabled) {
// Retrieve disabled style information.
background = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_DISABLED_BACKGROUND);
backgroundImage = (FillImage) textComponent.getRenderProperty(TextComponent.PROPERTY_DISABLED_BACKGROUND_IMAGE);
border = (Border) textComponent.getRenderProperty(TextComponent.PROPERTY_DISABLED_BORDER);
font = (Font) textComponent.getRenderProperty(TextComponent.PROPERTY_DISABLED_FONT);
foreground = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_DISABLED_FOREGROUND);
// Fallback to normal styles.
if (background == null) {
background = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_BACKGROUND);
if (backgroundImage == null) {
// Special case:
// Disabled background without disabled background image will render disabled background instead of
// normal background image.
backgroundImage = (FillImage) textComponent.getRenderProperty(TextComponent.PROPERTY_BACKGROUND_IMAGE);
}
}
if (border == null) {
border = (Border) textComponent.getRenderProperty(TextComponent.PROPERTY_BORDER);
}
if (font == null) {
font = (Font) textComponent.getRenderProperty(TextComponent.PROPERTY_FONT);
}
if (foreground == null) {
foreground = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_FOREGROUND);
}
} else {
border = (Border) textComponent.getRenderProperty(TextComponent.PROPERTY_BORDER);
foreground = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_FOREGROUND);
background = (Color) textComponent.getRenderProperty(TextComponent.PROPERTY_BACKGROUND);
font = (Font) textComponent.getRenderProperty(TextComponent.PROPERTY_FONT);
backgroundImage = (FillImage) textComponent.getRenderProperty(TextComponent.PROPERTY_BACKGROUND_IMAGE);
}
Alignment alignment = (Alignment) textComponent.getRenderProperty(TextComponent.PROPERTY_ALIGNMENT);
if (alignment != null) {
int horizontalAlignment = AlignmentRender.getRenderedHorizontal(alignment, textComponent);
switch (horizontalAlignment) {
case Alignment.LEFT:
cssStyle.setAttribute("text-align", "left");
break;
case Alignment.CENTER:
cssStyle.setAttribute("text-align", "center");
break;
case Alignment.RIGHT:
cssStyle.setAttribute("text-align", "right");
break;
}
}
LayoutDirectionRender.renderToStyle(cssStyle, textComponent.getLayoutDirection(), textComponent.getLocale());
BorderRender.renderToStyle(cssStyle, border);
ColorRender.renderToStyle(cssStyle, foreground, background);
FontRender.renderToStyle(cssStyle, font);
FillImageRender.renderToStyle(cssStyle, rc, this, textComponent, IMAGE_ID_BACKGROUND, backgroundImage,
FillImageRender.FLAG_DISABLE_FIXED_MODE);
InsetsRender.renderToStyle(cssStyle, "padding", (Insets) textComponent.getRenderProperty(TextComponent.PROPERTY_INSETS));
Extent width = (Extent) textComponent.getRenderProperty(TextComponent.PROPERTY_WIDTH);
Extent height = (Extent) textComponent.getRenderProperty(TextComponent.PROPERTY_HEIGHT);
if (width != null) {
cssStyle.setAttribute("width", ExtentRender.renderCssAttributeValue(width));
}
if (height != null) {
cssStyle.setAttribute("height", ExtentRender.renderCssAttributeValue(height));
}
return cssStyle;
}
/**
* @see nextapp.echo2.webcontainer.ComponentSynchronizePeer#getContainerId(nextapp.echo2.app.Component)
*/
public String getContainerId(Component child) {
throw new UnsupportedOperationException("Component does not support children.");
}
/**
* @see nextapp.echo2.webcontainer.image.ImageRenderSupport#getImage(nextapp.echo2.app.Component,
* java.lang.String)
*/
public ImageReference getImage(Component component, String imageId) {
if (IMAGE_ID_BACKGROUND.equals(imageId)) {
FillImage backgroundImage;
if (component.isRenderEnabled()) {
backgroundImage = (FillImage) component.getRenderProperty(TextComponent.PROPERTY_BACKGROUND_IMAGE);
} else {
backgroundImage = (FillImage) component.getRenderProperty(TextComponent.PROPERTY_DISABLED_BACKGROUND_IMAGE);
if (backgroundImage == null) {
backgroundImage = (FillImage) component.getRenderProperty(TextComponent.PROPERTY_BACKGROUND_IMAGE);
}
}
if (backgroundImage == null) {
return null;
} else {
return backgroundImage.getImage();
}
} else {
return null;
}
}
/**
* @see nextapp.echo2.webcontainer.ActionProcessor#processAction(nextapp.echo2.webcontainer.ContainerInstance,
* nextapp.echo2.app.Component, org.w3c.dom.Element)
*/
public void processAction(ContainerInstance ci, Component component, Element actionElement) {
ci.getUpdateManager().getClientUpdateManager().setComponentAction(component, TextComponent.INPUT_ACTION, null);
}
/**
* @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) {
String propertyName = propertyElement.getAttribute(PropertyUpdateProcessor.PROPERTY_NAME);
if (TextComponent.TEXT_CHANGED_PROPERTY.equals(propertyName)) {
String propertyValue = DomUtil.getElementText(propertyElement);
ci.getUpdateManager().getClientUpdateManager().setComponentProperty(component,
TextComponent.TEXT_CHANGED_PROPERTY, propertyValue);
} else if (TextComponent.PROPERTY_HORIZONTAL_SCROLL.equals(propertyName)) {
Extent propertyValue = new Extent(Integer.parseInt(
propertyElement.getAttribute(PropertyUpdateProcessor.PROPERTY_VALUE)));
ci.getUpdateManager().getClientUpdateManager().setComponentProperty(component,
TextComponent.PROPERTY_HORIZONTAL_SCROLL, propertyValue);
} else if (TextComponent.PROPERTY_VERTICAL_SCROLL.equals(propertyName)) {
Extent propertyValue = new Extent(Integer.parseInt(
propertyElement.getAttribute(PropertyUpdateProcessor.PROPERTY_VALUE)));
ci.getUpdateManager().getClientUpdateManager().setComponentProperty(component,
TextComponent.PROPERTY_VERTICAL_SCROLL, propertyValue);
}
}
/**
* @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) {
Element domAddElement = DomUpdate.renderElementAdd(rc.getServerMessage());
DocumentFragment htmlFragment = rc.getServerMessage().getDocument().createDocumentFragment();
renderHtml(rc, update, htmlFragment, component);
DomUpdate.renderElementAddContent(rc.getServerMessage(), domAddElement, targetId, htmlFragment);
}
/**
* @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) {
rc.getServerMessage().addLibrary(TEXT_COMPONENT_SERVICE.getId());
renderDisposeDirective(rc, (TextComponent) component);
}
/**
* Renders a directive to the outgoing <code>ServerMessage</code> to
* dispose the state of a text component, performing tasks such as
* registering event listeners on the client.
*
* @param rc the relevant <code>RenderContext</code>
* @param textComponent the <code>TextComponent<code>
*/
public void renderDisposeDirective(RenderContext rc, TextComponent textComponent) {
String elementId = ContainerInstance.getElementId(textComponent);
ServerMessage serverMessage = rc.getServerMessage();
Element itemizedUpdateElement = serverMessage.getItemizedDirective(ServerMessage.GROUP_ID_PREREMOVE,
"EchoTextComponent.MessageProcessor", "dispose", new String[0], new String[0]);
Element itemElement = serverMessage.getDocument().createElement("item");
itemElement.setAttribute("eid", elementId);
itemizedUpdateElement.appendChild(itemElement);
}
/**
* Renders a directive to the outgoing <code>ServerMessage</code> to
* initialize the state of a text component, performing tasks such as
* registering event listeners on the client.
*
* @param rc the relevant <code>RenderContext</code>
* @param textComponent the <code>TextComponent<code>
*/
public void renderInitDirective(RenderContext rc, TextComponent textComponent) {
Extent horizontalScroll = (Extent) textComponent.getRenderProperty(TextComponent.PROPERTY_HORIZONTAL_SCROLL);
Extent verticalScroll = (Extent) textComponent.getRenderProperty(TextComponent.PROPERTY_VERTICAL_SCROLL);
String elementId = ContainerInstance.getElementId(textComponent);
ServerMessage serverMessage = rc.getServerMessage();
Element itemizedUpdateElement = serverMessage.getItemizedDirective(ServerMessage.GROUP_ID_POSTUPDATE,
"EchoTextComponent.MessageProcessor", "init", new String[0], new String[0]);
Element itemElement = serverMessage.getDocument().createElement("item");
itemElement.setAttribute("eid", elementId);
if (horizontalScroll != null && horizontalScroll.getValue() != 0) {
itemElement.setAttribute("horizontal-scroll", ExtentRender.renderCssAttributePixelValue(horizontalScroll, "0"));
}
if (verticalScroll != null && verticalScroll.getValue() != 0) {
itemElement.setAttribute("vertical-scroll", ExtentRender.renderCssAttributePixelValue(verticalScroll, "0"));
}
if (textComponent instanceof TextArea) {
Integer maximumLength = (Integer) textComponent.getProperty(TextComponent.PROPERTY_MAXIMUM_LENGTH);
if (maximumLength != null) {
itemElement.setAttribute("maximum-length", maximumLength.toString());
}
}
if (textComponent instanceof TextArea && rc.getContainerInstance().getClientProperties().getBoolean(
ClientProperties.QUIRK_TEXTAREA_CONTENT)) {
String value = textComponent.getText();
if (value != null) {
itemElement.setAttribute("text", value);
}
}
if (!textComponent.isRenderEnabled()) {
itemElement.setAttribute("enabled", "false");
}
if (textComponent.hasActionListeners()) {
itemElement.setAttribute("server-notify", "true");
}
itemizedUpdateElement.appendChild(itemElement);
}
/**
* @see nextapp.echo2.webcontainer.FocusSupport#renderSetFocus(nextapp.echo2.webcontainer.RenderContext,
* nextapp.echo2.app.Component)
*/
public void renderSetFocus(RenderContext rc, Component component) {
WindowUpdate.renderSetFocus(rc.getServerMessage(), ContainerInstance.getElementId(component));
}
/**
* @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.hasUpdatedProperties()) {
if (!partialUpdateManager.canProcess(rc, update)) {
fullReplace = true;
}
}
if (fullReplace) {
// Perform full update.
DomUpdate.renderElementRemove(rc.getServerMessage(), ContainerInstance.getElementId(update.getParent()));
renderAdd(rc, update, targetId, update.getParent());
} else {
partialUpdateManager.process(rc, update);
}
return false;
}
}