diff options
| -rw-r--r-- | src/org/apache/fop/fo/PropertyList.java | 128 |
1 files changed, 119 insertions, 9 deletions
diff --git a/src/org/apache/fop/fo/PropertyList.java b/src/org/apache/fop/fo/PropertyList.java index ad84046f7..54ca49138 100644 --- a/src/org/apache/fop/fo/PropertyList.java +++ b/src/org/apache/fop/fo/PropertyList.java @@ -67,18 +67,69 @@ public class PropertyList extends Hashtable { this.element = el; } + /** + * Return the value explicitly specified on this FO. + * @param propertyName The name of the property whose value is desired. + * @return The value if the property is explicitly set, otherwise null. + */ + public Property getExplicit(String propertyName) { + return (Property)super.get(propertyName); + } + + /** + * Return the value of this property inherited by this FO. + * Implements the inherited-property-value function. + * The property must be inheritable! + * @param propertyName The name of the property whose value is desired. + * @return The inherited value, otherwise null. + */ + public Property getInherited(String propertyName) { + if (builder != null) { + if (parentPropertyList != null && + builder.isInherited(namespace, element, propertyName)) { + return parentPropertyList.get(propertyName); + } + else { + // return the "initial" value + try { + return builder.makeProperty(this, namespace, element, propertyName); + } catch (org.apache.fop.apps.FOPException e) { + MessageHandler.errorln("Exception in getInherited(): property=" + + propertyName + " : " + e); + } + } + } + return null; // No builder or exception in makeProperty! + } + + /** + * Return the property on the current FlowObject. If it isn't set explicitly, + * this will try to compute it based on other properties, or if it is + * inheritable, to return the inherited value. If all else fails, it returns + * the default value. + */ public Property get(String propertyName) { if (builder == null) MessageHandler.errorln("OH OH, builder has not been set"); - Property p = (Property)super.get(propertyName); + + /* Handle request for one part of a compound property */ + int sepchar = propertyName.indexOf('.'); + String subpropName = null; + if (sepchar > -1) { + subpropName = propertyName.substring(sepchar+1); + propertyName = propertyName.substring(0,sepchar); + } + + Property p = getExplicit(propertyName); if (p == null) { // if not explicit p = this.builder.computeProperty(this,namespace, element, propertyName); - if (p == null) { // else inherit - if ((this.parentPropertyList != null)&&(this.builder.isInherited(namespace, element, propertyName))) { // check for parent + if (p == null) { // else inherit (if has parent and is inheritable) + if ((this.parentPropertyList != null) && + (this.builder.isInherited(namespace, element, propertyName))) { p = this.parentPropertyList.get(propertyName); // retrieve parent's value - } else { // default + } else { // default value try { p = this.builder.makeProperty(this,namespace, element,propertyName); } catch (FOPException e) { @@ -87,15 +138,74 @@ public class PropertyList extends Hashtable { } } } - return p; + if (subpropName != null) { + return this.builder.getSubpropValue(namespace, element, propertyName, + p, subpropName); + } + else return p; } public void setBuilder(PropertyListBuilder builder) { this.builder = builder; } - public String getNameSpace() - { - return namespace; - } + public String getNameSpace() + { + return namespace; + } + + public String getElement() + { + return element; + } + + /** + * Return the "nearest" specified value for the given property. + * Implements the from-nearest-specified-value function. + * @param propertyName The name of the property whose value is desired. + * @return The computed value if the property is explicitly set on some + * ancestor of the current FO, else the initial value. + */ + public Property getNearestSpecified(String propertyName) { + Property p = null; + for (PropertyList plist = this; p == null && plist != null; + plist = plist.parentPropertyList) { + p = plist.getExplicit(propertyName); + } + if (p == null) { + // If no explicit setting found, return initial (default) value. + try { + p = this.builder.makeProperty(this,namespace, element,propertyName); + } catch (FOPException e) { + MessageHandler.errorln("Exception in getNearestSpecified(): property=" + + propertyName + " : " + e); + } + } + return p; + } + + /** + * Return the value of this property on the parent of this FO. + * Implements the from-parent function. + * @param propertyName The name of the property whose value is desired. + * @return The computed value on the parent or the initial value if this + * FO is the root or is in a different namespace from its parent. + */ + public Property getFromParent(String propertyName) { + if (parentPropertyList != null) { + return parentPropertyList.get(propertyName); + } + else if (builder != null) { + // return the "initial" value + try { + return builder.makeProperty(this, namespace, element, propertyName); + } catch (org.apache.fop.apps.FOPException e) { + MessageHandler.errorln("Exception in getFromParent(): property=" + + propertyName + " : " + e); + } + } + return null; // No builder or exception in makeProperty! + } + } + |