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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Body.java | - | 86.4% | 66.7% | 80.6% |
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| 1 | // Copyright 2004, 2005 The Apache Software Foundation | |
| 2 | // | |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 | // you may not use this file except in compliance with the License. | |
| 5 | // You may obtain a copy of the License at | |
| 6 | // | |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 | // | |
| 9 | // Unless required by applicable law or agreed to in writing, software | |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 | // See the License for the specific language governing permissions and | |
| 13 | // limitations under the License. | |
| 14 | ||
| 15 | package org.apache.tapestry.html; | |
| 16 | ||
| 17 | import org.apache.hivemind.Resource; | |
| 18 | import org.apache.tapestry.AbstractComponent; | |
| 19 | import org.apache.tapestry.IMarkupWriter; | |
| 20 | import org.apache.tapestry.IRequestCycle; | |
| 21 | import org.apache.tapestry.PageRenderSupport; | |
| 22 | import org.apache.tapestry.TapestryUtils; | |
| 23 | import org.apache.tapestry.asset.AssetFactory; | |
| 24 | import org.apache.tapestry.util.PageRenderSupportImpl; | |
| 25 | import org.apache.tapestry.web.WebResponse; | |
| 26 | ||
| 27 | /** | |
| 28 | * The body of a Tapestry page. This is used since it allows components on the page access to an | |
| 29 | * initialization script (that is written the start, just inside the <body> tag). This is | |
| 30 | * currently used by {@link Rollover}and {@link Script}components. [ <a | |
| 31 | * href="../../../../../ComponentReference/Body.html">Component Reference </a>] | |
| 32 | * | |
| 33 | * @author Howard Lewis Ship | |
| 34 | */ | |
| 35 | ||
| 36 | public abstract class Body extends AbstractComponent implements PageRenderSupport | |
| 37 | { | |
| 38 | private PageRenderSupportImpl _pageRenderSupport; | |
| 39 | ||
| 40 | /** | |
| 41 | * Adds to the script an initialization for the named variable as an Image(), to the given URL. | |
| 42 | * <p> | |
| 43 | * Returns a reference, a string that can be used to represent the preloaded image in a | |
| 44 | * JavaScript function. | |
| 45 | * | |
| 46 | * @since 1.0.2 | |
| 47 | */ | |
| 48 | ||
| 49 | 0 | public String getPreloadedImageReference(String URL) |
| 50 | { | |
| 51 | 0 | return _pageRenderSupport.getPreloadedImageReference(URL); |
| 52 | } | |
| 53 | ||
| 54 | /** | |
| 55 | * Adds other initialization, in the form of additional JavaScript code to execute from the | |
| 56 | * <body>'s <code>onLoad</code> event handler. The caller is responsible for adding a | |
| 57 | * semicolon (statement terminator). This method will add a newline after the script. | |
| 58 | */ | |
| 59 | ||
| 60 | 141 | public void addInitializationScript(String script) |
| 61 | { | |
| 62 | 141 | _pageRenderSupport.addInitializationScript(script); |
| 63 | } | |
| 64 | ||
| 65 | /** | |
| 66 | * Adds additional scripting code to the page. This code will be added to a large block of | |
| 67 | * scripting code at the top of the page (i.e., the before the <body> tag). | |
| 68 | * <p> | |
| 69 | * This is typically used to add some form of JavaScript event handler to a page. For example, | |
| 70 | * the {@link Rollover}component makes use of this. | |
| 71 | * <p> | |
| 72 | * Another way this is invoked is by using the {@link Script}component. | |
| 73 | * <p> | |
| 74 | * The string will be added, as-is, within the <script> block generated by this | |
| 75 | * <code>Body</code> component. The script should <em>not</em> contain HTML comments, those | |
| 76 | * will be supplied by this Body component. | |
| 77 | * <p> | |
| 78 | * A frequent use is to add an initialization function using this method, then cause it to be | |
| 79 | * executed using {@link #addInitializationScript(String)}. | |
| 80 | */ | |
| 81 | ||
| 82 | 0 | public void addBodyScript(String script) |
| 83 | { | |
| 84 | 0 | _pageRenderSupport.addBodyScript(script); |
| 85 | } | |
| 86 | ||
| 87 | /** | |
| 88 | * Used to include a script from an outside URL (the scriptLocation is a URL, probably obtained | |
| 89 | * from an asset. This adds an <script src="..."> tag before the main <script> tag. | |
| 90 | * The Body component ensures that each URL is included only once. | |
| 91 | * | |
| 92 | * @since 1.0.5 | |
| 93 | */ | |
| 94 | ||
| 95 | 117 | public void addExternalScript(Resource scriptLocation) |
| 96 | { | |
| 97 | 117 | _pageRenderSupport.addExternalScript(scriptLocation); |
| 98 | } | |
| 99 | ||
| 100 | /** | |
| 101 | * Retrieves the <code>Body</code> that was stored into the request cycle. This allows | |
| 102 | * components wrapped by the <code>Body</code> to locate it and access the services it | |
| 103 | * provides. | |
| 104 | * | |
| 105 | * @param cycle Request cycle in which the Body was stored | |
| 106 | * @return Body wrapping the components for the specified request cycle | |
| 107 | * | |
| 108 | * @deprecated To be removed in 4.1. Use | |
| 109 | * {@link org.apache.tapestry.TapestryUtils#getOptionalPageRenderSupport(IRequestCycle)} | |
| 110 | * instead. | |
| 111 | */ | |
| 112 | ||
| 113 | 6 | public static Body get(IRequestCycle cycle) |
| 114 | { | |
| 115 | 6 | return (Body) TapestryUtils.getOptionalPageRenderSupport(cycle); |
| 116 | } | |
| 117 | ||
| 118 | 207 | protected void prepareForRender(IRequestCycle cycle) |
| 119 | { | |
| 120 | 207 | super.prepareForRender(cycle); |
| 121 | ||
| 122 | 207 | _pageRenderSupport = new PageRenderSupportImpl(getAssetFactory(), getResponse() |
| 123 | .getNamespace(), getLocation()); | |
| 124 | } | |
| 125 | ||
| 126 | 207 | protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
| 127 | { | |
| 128 | 207 | TapestryUtils.storePageRenderSupport(cycle, this); |
| 129 | ||
| 130 | 207 | IMarkupWriter nested = writer.getNestedWriter(); |
| 131 | ||
| 132 | 207 | renderBody(nested, cycle); |
| 133 | ||
| 134 | // Start the body tag. | |
| 135 | 189 | writer.println(); |
| 136 | 189 | writer.begin(getElement()); |
| 137 | 189 | renderInformalParameters(writer, cycle); |
| 138 | ||
| 139 | 189 | writer.println(); |
| 140 | ||
| 141 | // Write the page's scripting. This is included scripts | |
| 142 | // and dynamic JavaScript. | |
| 143 | ||
| 144 | 189 | _pageRenderSupport.writeBodyScript(writer, cycle); |
| 145 | ||
| 146 | // Close the nested writer, which dumps its buffered content | |
| 147 | // into its parent. | |
| 148 | ||
| 149 | 189 | nested.close(); |
| 150 | ||
| 151 | // Any initialization should go at the very end of the document | |
| 152 | // just before the close body tag. Older version of Tapestry | |
| 153 | // would create a window.onload event handler, but this is better | |
| 154 | // (it doesn't have to wait for external images to load). | |
| 155 | ||
| 156 | 189 | _pageRenderSupport.writeInitializationScript(writer); |
| 157 | ||
| 158 | 189 | writer.end(); // <body> |
| 159 | } | |
| 160 | ||
| 161 | 207 | protected void cleanupAfterRender(IRequestCycle cycle) |
| 162 | { | |
| 163 | 207 | super.cleanupAfterRender(cycle); |
| 164 | ||
| 165 | 207 | _pageRenderSupport = null; |
| 166 | ||
| 167 | 207 | TapestryUtils.removePageRenderSupport(cycle); |
| 168 | } | |
| 169 | ||
| 170 | /** | |
| 171 | * Parameter. | |
| 172 | */ | |
| 173 | public abstract String getElement(); | |
| 174 | ||
| 175 | /** | |
| 176 | * Injected | |
| 177 | * | |
| 178 | * @since 4.0 | |
| 179 | */ | |
| 180 | public abstract AssetFactory getAssetFactory(); | |
| 181 | ||
| 182 | /** | |
| 183 | * Injected | |
| 184 | * | |
| 185 | * @since 4.0 | |
| 186 | */ | |
| 187 | ||
| 188 | public abstract WebResponse getResponse(); | |
| 189 | ||
| 190 | /** @since 3.0 */ | |
| 191 | ||
| 192 | 0 | public String getUniqueString(String baseValue) |
| 193 | { | |
| 194 | 0 | return _pageRenderSupport.getUniqueString(baseValue); |
| 195 | } | |
| 196 | ||
| 197 | } |
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