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Library to use the rendering library for Android layouts: layoutlib
/*
* Copyright (C) 2010 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 static com.android.ide.common.rendering.api.Result.Status.NOT_IMPLEMENTED;
import com.android.ide.common.rendering.api.Result.Status;
import java.awt.image.BufferedImage;
import java.util.List;
import java.util.Map;
/**
* An object allowing interaction with an Android layout.
*
* This is returned by {@link Bridge#createSession(SessionParams)}.
* and can then be used for subsequent actions on the layout.
*
* @since 5
*
*/
public class RenderSession {
/**
* Returns the last operation result.
*/
public Result getResult() {
return NOT_IMPLEMENTED.createResult();
}
/**
* Returns the {@link ViewInfo} objects for the top level views.
*
* It contains {@code ViewInfo} for only the views in the layout. For {@code ViewInfo} of the
* System UI surrounding the layout use {@link #getSystemRootViews()}. In most cases the list
* will only contain one item. If the top level node is a {@code merge} though then it will
* contain all the items under the {@code merge} tag.
*
* This is reset to a new instance every time {@link #render()} is called and can be
* null if the call failed (and the method returned a {@link Result} with
* {@link Status#ERROR_UNKNOWN} or {@link Status#NOT_IMPLEMENTED}.
*
* This can be safely modified by the caller, but {@code #getSystemRootViews} and
* {@code #getRootViews} share some view infos, so modifying one result can affect the other.
*
* @return the list of {@link ViewInfo} or null if there aren't any.
*
* @see #getSystemRootViews()
*/
public List getRootViews() {
return null;
}
/**
* Returns the {@link ViewInfo} objects for the system decor views, like the ActionBar.
*
* This is reset to a new instance every time {@link #render()} is called and can be
* null if the call failed, or there was no system decor.
*
* This can be safely modified by the caller, but {@code #getSystemRootViews} and
* {@code #getRootViews} share some view infos, so modifying one result can affect the other.
*
* @return the list of {@link ViewInfo} or null if there aren't any.
*/
public List getSystemRootViews() {
return null;
}
/**
* Returns the rendering of the full layout.
*
* This is reset to a new instance every time {@link #render()} is called and can be
* null if the call failed (and the method returned a {@link Result} with
* {@link Status#ERROR_UNKNOWN} or {@link Status#NOT_IMPLEMENTED}.
*
* This can be safely modified by the caller.
*/
public BufferedImage getImage() {
return null;
}
/**
* Returns true if the current image alpha channel is relevant.
*
* @return whether the image alpha channel is relevant.
*/
public boolean isAlphaChannelImage() {
return true;
}
/**
* Returns a map of (XML attribute name, attribute value) containing only default attribute
* values, for the given view Object.
* @param viewObject the view object.
* @return a map of the default property values or null.
*/
public Map getDefaultProperties(Object viewObject) {
return null;
}
/**
* Re-renders the layout as-is.
* In case of success, this should be followed by calls to {@link #getRootViews()} and
* {@link #getImage()} to access the result of the rendering.
*
* This is equivalent to calling render(SceneParams.DEFAULT_TIMEOUT)
*
* @return a {@link Result} indicating the status of the action.
*/
public Result render() {
return render(RenderParams.DEFAULT_TIMEOUT);
}
/**
* Re-renders the layout as-is, with a given timeout in case other renderings are being done.
* In case of success, this should be followed by calls to {@link #getRootViews()} and
* {@link #getImage()} to access the result of the rendering.
*
* The {@link Bridge} is only able to inflate or render one layout at a time. There
* is an internal lock object whenever such an action occurs. The timeout parameter is used
* when attempting to acquire the lock. If the timeout expires, the method will return
* {@link Status#ERROR_TIMEOUT}.
*
* @param timeout timeout for the rendering, in milliseconds.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result render(long timeout) {
return render(timeout, false);
}
/**
* Re-renders the layout as-is, with a given timeout in case other renderings are being done.
* In case of success, this should be followed by calls to {@link #getRootViews()} and
* {@link #getImage()} to access the result of the rendering.
* This call also allows triggering a forced measure.
*
* The {@link Bridge} is only able to inflate or render one layout at a time. There
* is an internal lock object whenever such an action occurs. The timeout parameter is used
* when attempting to acquire the lock. If the timeout expires, the method will return
* {@link Status#ERROR_TIMEOUT}.
*
* @param timeout timeout for the rendering, in milliseconds.
* @param forceMeasure force running measure for the layout.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result render(long timeout, boolean forceMeasure) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Sets the value of a given property on a given object.
*
* This does nothing more than change the property. To render the scene in its new state, a
* call to {@link #render()} is required.
*
* Any amount of actions can be taken on the scene before {@link #render()} is called.
*
* @param objectView
* @param propertyName
* @param propertyValue
*
* @return a {@link Result} indicating the status of the action.
*
* @throws IllegalArgumentException if the view object is not an android.view.View
*/
public Result setProperty(Object objectView, String propertyName, String propertyValue) {
return NOT_IMPLEMENTED.createResult();
}
/**
* returns the value of a given property on a given object.
*
* This returns a {@link Result} object. If the operation of querying the object for its
* property was successful (check {@link Result#isSuccess()}), then the property value
* is set in the result and can be accessed through {@link Result#getData()}.
*
* @param objectView
* @param propertyName
*
* @return a {@link Result} indicating the status of the action.
*
* @throws IllegalArgumentException if the view object is not an android.view.View
*/
public Result getProperty(Object objectView, String propertyName) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Inserts a new child in a ViewGroup object, and renders the result.
*
* The child is first inflated and then added to its new parent, at the given index
* position. If the index is -1 then the child is added at the end of the parent.
*
* If an animation listener is passed then the rendering is done asynchronously and the
* result is sent to the listener.
* If the listener is null, then the rendering is done synchronously.
*
* The child stays in the view hierarchy after the rendering is done. To remove it call
* {@link #removeChild(Object, IAnimationListener)}
*
* The returned {@link Result} object will contain the android.view.View object for
* the newly inflated child. It is accessible through {@link Result#getData()}.
*
* @param parentView the parent View object to receive the new child.
* @param childXml an {@link ILayoutPullParser} containing the content of the new child,
* including ViewGroup.LayoutParams attributes.
* @param index the index at which position to add the new child into the parent. -1 means at
* the end.
* @param listener an optional {@link IAnimationListener}.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result insertChild(Object parentView, ILayoutPullParser childXml, int index,
IAnimationListener listener) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Move a new child to a different ViewGroup object.
*
* The child is first removed from its current parent, and then added to its new parent, at the
* given index position. In case the parentView is the current parent of
* childView then the index must be the value with the childView removed
* from its parent. If the index is -1 then the child is added at the end of
* the parent.
*
* If an animation listener is passed then the rendering is done asynchronously and the
* result is sent to the listener.
* If the listener is null, then the rendering is done synchronously.
*
* The child stays in the view hierarchy after the rendering is done. To remove it call
* {@link #removeChild(Object, IAnimationListener)}
*
* The returned {@link Result} object will contain the android.view.ViewGroup.LayoutParams
* object created from the layoutParams map if it was non null.
*
* @param parentView the parent View object to receive the child. Can be the current parent
* already.
* @param childView the view to move.
* @param index the index at which position to add the new child into the parent. -1 means at
* the end.
* @param layoutParams an optional map of new ViewGroup.LayoutParams attribute. If non null,
* then the current layout params of the view will be removed and a new one will
* be inflated and set with the content of the map.
* @param listener an optional {@link IAnimationListener}.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result moveChild(Object parentView, Object childView, int index,
Map layoutParams, IAnimationListener listener) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Removes a child from a ViewGroup object.
*
* This does nothing more than change the layout. To render the scene in its new state, a
* call to {@link #render()} is required.
*
* Any amount of actions can be taken on the scene before {@link #render()} is called.
*
* @param childView the view object to remove from its parent
* @param listener an optional {@link IAnimationListener}.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result removeChild(Object childView, IAnimationListener listener) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Starts playing an given animation on a given object.
*
* The animation playback is asynchronous and the rendered frame is sent vi the
* listener.
*
* @param targetObject the view object to animate
* @param animationName the name of the animation (res/anim) to play.
* @param listener the listener callback.
*
* @return a {@link Result} indicating the status of the action.
*/
public Result animate(Object targetObject, String animationName,
boolean isFrameworkAnimation, IAnimationListener listener) {
return NOT_IMPLEMENTED.createResult();
}
/**
* Sets the current system time in nanos.
* Calls to this method must check that layoutlib supports {@link Features#SYSTEM_TIME}
*/
public void setSystemTimeNanos(long nanos) {
throw new UnsupportedOperationException(
"Current layoutlib version doesn't support Features.SYSTEM_TIME");
}
/**
* Sets the system boot time in nanos.
* Calls to this method must check that layoutlib supports {@link Features#SYSTEM_TIME}
*/
public void setSystemBootTimeNanos(long nanos) {
throw new UnsupportedOperationException(
"Current layoutlib version doesn't support Features.SYSTEM_TIME");
}
/**
* Sets the time for which the next frame will be selected. The time is the elapsed time from
* the current system nanos time.
* Calls to this method must check that layoutlib supports {@link Features#SYSTEM_TIME}
*/
public void setElapsedFrameTimeNanos(long nanos) {
throw new UnsupportedOperationException(
"Current layoutlib version doesn't support Features.SYSTEM_TIME");
}
/**
* Discards the layout. No more actions can be called on this object.
*/
public void dispose() {
}
}