Question

我正在尝试在Primefaces自定义组件的JS小部件代码中检索javascript变量（数组）的内容...我知道我在组件及其渲染器java代码中缺少步骤！

事实上，我想根据存储在javascript数组中的命令列表在Primefaces Terminal上添加一个完成功能（以及其他功能），我希望在扩展的属性中提供该功能。终端组件例如：<my:terminal completion="commandsList" /> 拥有：var commandsList = ["foo", "bar"];

到目前为止，这是代码：

MyTerminal.java

@ResourceDependencies({
@ResourceDependency(library="primefaces", name="terminal/terminal.css"),
@ResourceDependency(library="primefaces", name="primefaces.css"),
@ResourceDependency(library="primefaces", name="jquery/jquery.js"),
@ResourceDependency(library="primefaces", name="jquery/jquery-plugins.js"),
@ResourceDependency(library="primefaces", name="primefaces.js"),
@ResourceDependency(library="primefaces", name="terminal/terminal.js"),
@ResourceDependency(library="js", name="terminal.js")
 })
 @FacesComponent(MyTerminal.COMPONENT_TYPE)
 public class MyTerminal extends Terminal {
public static final String COMPONENT_FAMILY = "com.jsf.components";
public static final String COMPONENT_TYPE = "com.jsf.components.MyTerminal";

@Override
public String getFamily() {
    return COMPONENT_FAMILY;
}

@Override
public String getRendererType() {
    return MyTerminalRenderer.RENDERER_TYPE;
}

private enum PropertyKeys {
    completion
}

public String getCompletion() {
    return (String) getStateHelper().eval(PropertyKeys.completion, null);
}

public void setCompletion(String completion) {
    getStateHelper().put(PropertyKeys.completion, completion);
}
}

MyTerminalRenderer.java

@FacesRenderer(
componentFamily = MyTerminal.COMPONENT_FAMILY,
rendererType = MyTerminalRenderer.RENDERER_TYPE
 )
 public class MyTerminalRenderer extends TerminalRenderer {

public static final String RENDERER_TYPE = "com.jsf.components.MyTerminalRenderer";

protected void encodeScript(FacesContext context, Terminal terminal) throws IOException {
    String clientId = terminal.getClientId(context);
    WidgetBuilder wb = getWidgetBuilder(context);
    wb.init("MyTerminal", terminal.resolveWidgetVar(), clientId);
    wb.finish();
}

@Override
public void encodeEnd(FacesContext context, UIComponent component)
           throws java.io.IOException {
     MyTerminal terminal = (MyTerminal) component;
     /* TREATMENT HERE ? */
     super.encodeEnd(context, component);
}
 }

terminal.js

PrimeFaces.widget.MyTerminal = PrimeFaces.widget.Terminal.extend({

init : function(cfg) {
    this._super(cfg);
    // WOULD LIKE TO GET commandsList VAR HERE!
},

任何帮助都会非常感激，我知道我可以直接从widget的init函数访问命令列表数组，但我真的想确保可扩展性。非常感谢提前！

Answer 1

正如我认为的解决方法，我设法使用passthrough参数，这样：

<my:terminal ... pt:completion="commandsList" />

xmlns:pt="http://xmlns.jcp.org/jsf/passthrough"

并通过评估'完成'属性值（即javascript数组的名称）在小部件的javascript代码中检索它：

PrimeFaces.widget.MyTerminal = PrimeFaces.widget.Terminal.extend({

init : function(cfg) {
    this._super(cfg);
    commandsList = window[this.jq.attr('completion')];
},

...但我对这个解决方案不满意，似乎对我来说是个补丁：s

修改：更改为window[varname]而不是eval(varname) ...至少更安全。

将javascript变量传递给自定义Primefaces组件

MyTerminal.java

MyTerminalRenderer.java

terminal.js

1 个答案: