PageRenderSupportImpl (tapestry

java.lang.Object
- org.apache.tapestry.util.PageRenderSupportImpl

All Implemented Interfaces:

org.apache.hivemind.Locatable, IScriptProcessor, PageRenderSupport
```
public class PageRenderSupportImpl
extends java.lang.Object
implements org.apache.hivemind.Locatable, PageRenderSupport
```
Implementation of PageRenderSupport. The Body component uses an instance of this class.

Since:

4.0

Author:

Howard M. Lewis Ship

Constructor Summary

Constructors
Constructor and Description
`PageRenderSupportImpl(AssetFactory assetFactory, java.lang.String namespace, org.apache.hivemind.Location location)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addBodyScript(java.lang.String script)` Adds scripting code to the main body.
`void`	`addExternalScript(org.apache.hivemind.Resource scriptLocation)` Adds an external script.
`void`	`addInitializationScript(java.lang.String script)` Adds initialization script.
`org.apache.hivemind.Location`	`getLocation()` Returns the location, which may be used in error messages.
`java.lang.String`	`getPreloadedImageReference(java.lang.String URL)` Sets up the given URL to preload, and returns a reference to the loaded image, in the form of a snippet of JavaScript expression that can be inserted into some larger block of JavaScript as a function parameter, or as a property assignment.
`java.lang.String`	`getUniqueString(java.lang.String baseValue)` Ensures that the given string is unique.
`void`	`writeBodyScript(IMarkupWriter writer, IRequestCycle cycle)` Writes a single large JavaScript block containing: Any image initializations (via `getPreloadedImageReference(String)`).
`void`	`writeInitializationScript(IMarkupWriter writer)` Writes any image initializations; this should be invoked at the end of the render, after all the related HTML will have already been streamed to the client and parsed by the web browser.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PageRenderSupportImpl
```
public PageRenderSupportImpl(AssetFactory assetFactory,
                     java.lang.String namespace,
                     org.apache.hivemind.Location location)
```
- Method Detail
  - getLocation
```
public org.apache.hivemind.Location getLocation()
```
    Returns the location, which may be used in error messages. In practical terms, this is the location of the Body component.
    
    Specified by:
    
    getLocation in interface org.apache.hivemind.Locatable
  - getPreloadedImageReference
```
public java.lang.String getPreloadedImageReference(java.lang.String URL)
```
    Description copied from interface: PageRenderSupport
    
    Sets up the given URL to preload, and returns a reference to the loaded image, in the form of a snippet of JavaScript expression that can be inserted into some larger block of JavaScript as a function parameter, or as a property assignment. A typical return value might be tapestry_preload[7].src.
    
    Specified by:
    
    getPreloadedImageReference in interface PageRenderSupport
  - addBodyScript
```
public void addBodyScript(java.lang.String script)
```
    Description copied from interface: IScriptProcessor
    
    Adds scripting code to the main body. During the render, multiple scripts may render multiple bodies; all are concatinated together to form a single block. The Body component will write the body script contents just inside the <body> tag.
    
    Specified by:
    
    addBodyScript in interface IScriptProcessor
  - addInitializationScript
```
public void addInitializationScript(java.lang.String script)
```
    Description copied from interface: IScriptProcessor
    
    Adds initialization script. Initialization script is executed once, when the containing page loads. Initialization script content is written only after all HTML content that could be referenced from the script (in effect, just before the </body> tag).
    Specified by: addInitializationScript in interface IScriptProcessor
  addExternalScript public void addExternalScript(org.apache.hivemind.Resource scriptLocation) Description copied from interface: IScriptProcessor Adds an external script. The processor is expected to ensure that external scripts are only loaded a single time per page. Specified by: addExternalScript in interface IScriptProcessor getUniqueString public java.lang.String getUniqueString(java.lang.String baseValue) Description copied from interface: IScriptProcessor Ensures that the given string is unique. The string is either returned unchanged, or a suffix is appended to ensure uniqueness. Specified by: getUniqueString in interface IScriptProcessor writeBodyScript public void writeBodyScript(IMarkupWriter writer, IRequestCycle cycle) Writes a single large JavaScript block containing: Any image initializations (via getPreloadedImageReference(String)). Any included scripts (via addExternalScript(Resource)). Any contributions (via addBodyScript(String)). See Also: writeInitializationScript(IMarkupWriter) writeInitializationScript public void writeInitializationScript(IMarkupWriter writer) Writes any image initializations; this should be invoked at the end of the render, after all the related HTML will have already been streamed to the client and parsed by the web browser. Earlier versions of Tapestry uses a window.onload event handler.

Class PageRenderSupportImpl

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

PageRenderSupportImpl

Method Detail

getLocation

getPreloadedImageReference

addBodyScript

addInitializationScript

addExternalScript

getUniqueString

writeBodyScript

writeInitializationScript