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package org.apache.tapestry.link; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.apache.tapestry.AbstractComponent; |
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import org.apache.tapestry.IMarkupWriter; |
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import org.apache.tapestry.IRequestCycle; |
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import org.apache.tapestry.PageRenderSupport; |
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import org.apache.tapestry.TapestryUtils; |
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import org.apache.tapestry.components.ILinkComponent; |
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import org.apache.tapestry.components.LinkEventType; |
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import org.apache.tapestry.engine.ILink; |
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42 | 0 | public abstract class AbstractLinkComponent extends AbstractComponent implements ILinkComponent |
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{ |
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private Map _eventHandlers; |
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public abstract boolean isDisabled(); |
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public void addEventHandler(LinkEventType eventType, String functionName) |
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{ |
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Object currentValue; |
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57 | 0 | if (_eventHandlers == null) |
58 | 0 | _eventHandlers = new HashMap(); |
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60 | 0 | currentValue = _eventHandlers.get(eventType); |
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64 | 0 | if (currentValue == null) |
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{ |
66 | 0 | _eventHandlers.put(eventType, functionName); |
67 | 0 | return; |
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} |
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72 | 0 | if (currentValue instanceof String) |
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{ |
74 | 0 | List list = new ArrayList(); |
75 | 0 | list.add(currentValue); |
76 | 0 | list.add(functionName); |
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78 | 0 | _eventHandlers.put(eventType, list); |
79 | 0 | return; |
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} |
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84 | 0 | List list = (List) currentValue; |
85 | 0 | list.add(functionName); |
86 | 0 | } |
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
94 | 0 | getRenderer().renderLink(writer, cycle, this); |
95 | 0 | } |
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protected void cleanupAfterRender(IRequestCycle cycle) |
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{ |
99 | 0 | super.cleanupAfterRender(cycle); |
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101 | 0 | _eventHandlers = null; |
102 | 0 | } |
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protected void writeEventHandlers(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
106 | 0 | String name = null; |
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108 | 0 | if (_eventHandlers == null) |
109 | 0 | return; |
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111 | 0 | PageRenderSupport pageRenderSupport = TapestryUtils.getPageRenderSupport(cycle, this); |
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113 | 0 | Iterator i = _eventHandlers.entrySet().iterator(); |
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115 | 0 | while (i.hasNext()) |
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{ |
117 | 0 | Map.Entry entry = (Map.Entry) i.next(); |
118 | 0 | LinkEventType type = (LinkEventType) entry.getKey(); |
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120 | 0 | name = writeEventHandler( |
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writer, |
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pageRenderSupport, |
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name, |
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type.getAttributeName(), |
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entry.getValue()); |
126 | 0 | } |
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128 | 0 | } |
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protected String writeEventHandler(IMarkupWriter writer, PageRenderSupport pageRenderSupport, |
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String name, String attributeName, Object value) |
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{ |
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String wrapperFunctionName; |
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|
135 | 0 | if (value instanceof String) |
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{ |
137 | 0 | wrapperFunctionName = (String) value; |
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} |
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else |
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{ |
141 | 0 | String finalName = name == null ? pageRenderSupport.getUniqueString("Link") : name; |
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143 | 0 | wrapperFunctionName = attributeName + "_" + finalName; |
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145 | 0 | StringBuffer buffer = new StringBuffer(); |
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147 | 0 | buffer.append("function "); |
148 | 0 | buffer.append(wrapperFunctionName); |
149 | 0 | buffer.append(" ()\n{\n"); |
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151 | 0 | Iterator i = ((List) value).iterator(); |
152 | 0 | while (i.hasNext()) |
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{ |
154 | 0 | String functionName = (String) i.next(); |
155 | 0 | buffer.append(" "); |
156 | 0 | buffer.append(functionName); |
157 | 0 | buffer.append("();\n"); |
158 | 0 | } |
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160 | 0 | buffer.append("}\n\n"); |
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162 | 0 | pageRenderSupport.addBodyScript(this, buffer.toString()); |
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} |
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165 | 0 | writer.attribute(attributeName, "javascript:" + wrapperFunctionName + "();"); |
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167 | 0 | return name; |
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} |
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public abstract ILinkRenderer getRenderer(); |
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public abstract void setRenderer(ILinkRenderer renderer); |
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public void renderAdditionalAttributes(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
178 | 0 | renderIdAttribute(writer, cycle); |
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180 | 0 | writeEventHandlers(writer, cycle); |
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184 | 0 | renderInformalParameters(writer, cycle); |
185 | 0 | } |
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public abstract String getAnchor(); |
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public ILink getLink(IRequestCycle cycle) |
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{ |
191 | 0 | return null; |
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} |
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protected void finishLoad() |
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{ |
202 | 0 | setRenderer(DefaultLinkRenderer.SHARED_INSTANCE); |
203 | 0 | } |
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} |