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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.common.rendering.api;
import com.android.resources.ResourceType;
import java.util.List;
/**
* A class containing all the resources needed to do a rendering.
*
* This contains both the project specific resources and the framework resources, and provide
* convenience methods to resolve resource and theme references.
*/
public class RenderResources {
public static final String REFERENCE_NULL = "@null";
public static final String REFERENCE_EMPTY = "@empty";
public static final String REFERENCE_UNDEFINED = "@undefined";
public static class FrameworkResourceIdProvider {
public Integer getId(ResourceType resType, String resName) {
return null;
}
}
public void setFrameworkResourceIdProvider(FrameworkResourceIdProvider provider) {
}
public void setLogger(LayoutLog logger) {
}
/**
* Returns the {@link StyleResourceValue} representing the current theme.
* @return the theme or null if there is no current theme.
* @deprecated Use {@link #getDefaultTheme()} or {@link #getAllThemes()}
*/
@Deprecated
public StyleResourceValue getCurrentTheme() {
// Default theme is same as the current theme was on older versions of the API.
// With the introduction of applyStyle() "current" theme makes little sense.
// Hence, simply return defaultTheme.
return getDefaultTheme();
}
/**
* Returns the {@link StyleResourceValue} representing the default theme.
*/
public StyleResourceValue getDefaultTheme() {
return null;
}
/**
* Use this theme to resolve resources.
*
* Remember to call {@link #clearStyles()} to clear the applied styles, so the default theme
* may be restored.
*
* @param theme The style to use for resource resolution in addition to the the default theme
* and the styles applied earlier. If null, the operation is a no-op.
* @param useAsPrimary If true, the {@code theme} is used first to resolve attributes. If
* false, the theme is used if the resource cannot be resolved using the default theme and
* all the themes that have been applied prior to this call.
*/
public void applyStyle(StyleResourceValue theme, boolean useAsPrimary) {
}
/**
* Clear all the themes applied with {@link #applyStyle(StyleResourceValue, boolean)}
*/
public void clearStyles() {
}
/**
* Returns a list of {@link StyleResourceValue} containing a list of themes to be used for
* resolving resources. The order of the themes in the list specifies the order in which they
* should be used to resolve resources.
*/
public List getAllThemes() {
return null;
}
/**
* Returns a theme by its name.
*
* @param name the name of the theme
* @param frameworkTheme whether the theme is a framework theme.
* @return the theme or null if there's no match
*/
public StyleResourceValue getTheme(String name, boolean frameworkTheme) {
return null;
}
/**
* Returns whether a theme is a parent of a given theme.
* @param parentTheme the parent theme
* @param childTheme the child theme.
* @return true if the parent theme is indeed a parent theme of the child theme.
*/
public boolean themeIsParentOf(StyleResourceValue parentTheme, StyleResourceValue childTheme) {
return false;
}
/**
* Returns a framework resource by type and name. The returned resource is resolved.
* @param resourceType the type of the resource
* @param resourceName the name of the resource
*/
public ResourceValue getFrameworkResource(ResourceType resourceType, String resourceName) {
return null;
}
/**
* Returns a project resource by type and name. The returned resource is resolved.
* @param resourceType the type of the resource
* @param resourceName the name of the resource
*/
public ResourceValue getProjectResource(ResourceType resourceType, String resourceName) {
return null;
}
/**
* Returns the {@link ResourceValue} matching a given name in the all themes returned by
* {@link #getAllThemes()}. If the item is not directly available in the a theme, its parent
* theme is used before checking the next theme from the list.
*
* @param itemName the name of the item to search for.
* @return the {@link ResourceValue} object or null
*
* @deprecated Use {@link #findItemInTheme(String, boolean)}
*/
@Deprecated
public ResourceValue findItemInTheme(String itemName) {
List allThemes = getAllThemes();
if (allThemes == null) {
return null;
}
for (StyleResourceValue theme : allThemes) {
//noinspection deprecation
ResourceValue value = findItemInStyle(theme, itemName);
if (value != null) {
return value;
}
}
return null;
}
/**
* Returns the {@link ResourceValue} matching a given name in the all themes returned by
* {@link #getAllThemes()}. If the item is not directly available in the a theme, its parent
* theme is used before checking the next theme from the list.
*
* @param attrName the name of the attribute to search for.
* @param isFrameworkAttr whether the attribute is a framework attribute
* @return the {@link ResourceValue} object or null
*/
public ResourceValue findItemInTheme(String attrName, boolean isFrameworkAttr) {
List allThemes = getAllThemes();
if (allThemes == null) {
return null;
}
for (StyleResourceValue theme : allThemes) {
ResourceValue value = findItemInStyle(theme, attrName, isFrameworkAttr);
if (value != null) {
return value;
}
}
return null;
}
/**
* Returns the {@link ResourceValue} matching a given name in a given style. If the
* item is not directly available in the style, the method looks in its parent style.
*
* This version of doesn't support providing the namespace of the attribute so it'll search
* in both the project's namespace and then in the android namespace.
*
* @param style the style to search in
* @param attrName the name of the attribute to search for.
* @return the {@link ResourceValue} object or null
*
* @deprecated Use {@link #findItemInStyle(StyleResourceValue, String, boolean)} since this
* method doesn't know the item namespace.
*/
@Deprecated
public ResourceValue findItemInStyle(StyleResourceValue style, String attrName) {
return null;
}
/**
* Returns the {@link ResourceValue} matching a given attribute in a given style. If the
* item is not directly available in the style, the method looks in its parent style.
*
* @param style the style to search in
* @param attrName the name of the attribute to search for.
* @param isFrameworkAttr whether the attribute is a framework attribute
* @return the {@link ResourceValue} object or null
*/
public ResourceValue findItemInStyle(StyleResourceValue style, String attrName,
boolean isFrameworkAttr) {
return null;
}
/**
* Searches for, and returns a {@link ResourceValue} by its reference.
*
* The reference format can be:
*
@resType/resName
* @android:resType/resName
* @resType/android:resName
* ?resType/resName
* ?android:resType/resName
* ?resType/android:resName
* Any other string format will return null.
*
* The actual format of a reference is
@[namespace:]resType/resName
but this method
* only support the android namespace.
*
* @param reference the resource reference to search for.
* @param forceFrameworkOnly if true all references are considered to be toward framework
* resource even if the reference does not include the android: prefix.
* @return a {@link ResourceValue} or null.
*/
public ResourceValue findResValue(String reference, boolean forceFrameworkOnly) {
return null;
}
/**
* Resolves the value of a resource, if the value references a theme or resource value.
*
* This method ensures that it returns a {@link ResourceValue} object that does not
* reference another resource.
* If the resource cannot be resolved, it returns null.
*
* If a value that does not need to be resolved is given, the method will return a new
* instance of {@link ResourceValue} that contains the input value.
*
* @param type the type of the resource
* @param name the name of the attribute containing this value.
* @param value the resource value, or reference to resolve
* @param isFrameworkValue whether the value is a framework value.
*
* @return the resolved resource value or null if it failed to resolve it.
*/
public ResourceValue resolveValue(ResourceType type, String name, String value,
boolean isFrameworkValue) {
return null;
}
/**
* Returns the {@link ResourceValue} referenced by the value of value.
*
* This method ensures that it returns a {@link ResourceValue} object that does not
* reference another resource.
* If the resource cannot be resolved, it returns null.
*
* If a value that does not need to be resolved is given, the method will return the input
* value.
*
* @param value the value containing the reference to resolve.
* @return a {@link ResourceValue} object or null
*/
public ResourceValue resolveResValue(ResourceValue value) {
return null;
}
/**
* Returns the parent style of the given style, if any
* @param style the style to look up
* @return the parent style, or null
*/
public StyleResourceValue getParent(StyleResourceValue style) {
return null;
}
/**
* Returns the style matching the given name. The name should not contain any namespace prefix.
* @param styleName Name of the style. For example, "Widget.ListView.DropDown".
* @return the {link StyleResourceValue} for the style, or null if not found.
*/
public StyleResourceValue getStyle(String styleName, boolean isFramework) {
return null;
}
}