com.intellij.android.designer.AndroidDesignerUtils Maven / Gradle / Ivy
/*
* Copyright (C) 2013 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.intellij.android.designer;
import com.android.ide.common.rendering.api.ViewInfo;
import com.android.tools.idea.configurations.Configuration;
import com.android.tools.idea.configurations.RenderContext;
import com.android.tools.idea.rendering.RenderLogger;
import com.android.tools.idea.rendering.RenderService;
import com.android.utils.XmlUtils;
import com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel;
import com.intellij.android.designer.designSurface.RootView;
import com.intellij.android.designer.model.RadViewComponent;
import com.intellij.designer.designSurface.EditableArea;
import com.intellij.designer.designSurface.FeedbackLayer;
import com.intellij.designer.model.RadComponent;
import com.intellij.designer.model.RadVisualComponent;
import com.intellij.designer.palette.PaletteItem;
import com.intellij.openapi.module.Module;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlFile;
import com.intellij.psi.xml.XmlTag;
import org.jetbrains.android.facet.AndroidFacet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.w3c.dom.Document;
import java.awt.*;
import java.util.List;
import java.util.Locale;
import static com.android.SdkConstants.*;
import static com.android.resources.Density.DEFAULT_DENSITY;
public class AndroidDesignerUtils {
private AndroidDesignerUtils() {
}
@Nullable
public static AndroidFacet getFacet(@NotNull EditableArea area) {
AndroidDesignerEditorPanel panel = getPanel(area);
if (panel != null) {
Configuration configuration = panel.getConfiguration();
assert configuration != null;
Module module = panel.getModule();
return AndroidFacet.getInstance(module);
}
return null;
}
@Nullable
public static RenderService getRenderService(@NotNull EditableArea area) {
AndroidDesignerEditorPanel panel = getPanel(area);
if (panel != null) {
Configuration configuration = panel.getConfiguration();
assert configuration != null;
XmlFile xmlFile = panel.getXmlFile();
Module module = panel.getModule();
AndroidFacet facet = AndroidFacet.getInstance(module);
assert facet != null;
RenderLogger logger = new RenderLogger(xmlFile.getName(), module);
@SuppressWarnings("UnnecessaryLocalVariable")
RenderContext renderContext = panel;
RenderService service = RenderService.create(facet, module, xmlFile, configuration, logger, renderContext);
assert service != null;
return service;
}
return null;
}
//////////////////////////////////////////////////////////////////////////////////////////
//
// Pixel (px) to Device Independent Pixel (dp) conversion
//
//////////////////////////////////////////////////////////////////////////////////////////
@Nullable
public static AndroidDesignerEditorPanel getPanel(@NotNull EditableArea area) {
RadComponent root = area.getRootComponent();
if (root instanceof RadVisualComponent) {
Component nativeComponent = ((RadVisualComponent)root).getNativeComponent();
if (nativeComponent instanceof RootView) {
return ((RootView)nativeComponent).getPanel();
}
}
return null;
}
/** Returns the dpi used to render in the designer corresponding to the given {@link EditableArea} */
public static int getDpi(@NotNull EditableArea area) {
AndroidDesignerEditorPanel panel = getPanel(area);
if (panel != null) {
return panel.getDpi();
}
return DEFAULT_DENSITY;
}
/**
* Converts a pixel to a dp (device independent pixel) for the current screen density
*
* @param area the associated {@link EditableArea}
* @param px the pixel dimension
* @return the corresponding dp dimension
*/
public static int pxToDp(@NotNull EditableArea area, int px) {
int dpi = getDpi(area);
return px * DEFAULT_DENSITY / dpi;
}
/**
* Converts a pixel to a dp (device independent pixel) for the current screen density,
* and returns it as a dimension string.
*
* @param area the associated {@link EditableArea}
* @param px the pixel dimension
* @return the corresponding dp dimension string
*/
@NotNull
public static String pxToDpWithUnits(@NotNull EditableArea area, int px) {
return String.format(Locale.US, VALUE_N_DP, pxToDp(area, px));
}
/**
* Converts a device independent pixel to a screen pixel for the current screen density
*
* @param dp the device independent pixel dimension
* @return the corresponding pixel dimension
*/
public static int dpToPx(@NotNull EditableArea area, int dp) {
int dpi = getDpi(area);
return dp * dpi / DEFAULT_DENSITY;
}
/**
* Returns the preferred size of the given component in the given editable area
*
* @param area the associated {@link EditableArea}
* @param component the component to measure
* @return the bounds, if they can be determined
*/
public static Dimension computePreferredSize(@NotNull EditableArea area, @NotNull RadViewComponent component,
@Nullable RadComponent targetParent) {
FeedbackLayer layer = area.getFeedbackLayer();
Dimension size = component.getBounds(layer).getSize();
if (size.width == 0 && size.height == 0) {
// TODO: If it's a layout, do something smarter. I really only have to worry about this
// if the creation XML calls for wrap_content!
RenderService service = getRenderService(area);
if (service != null) {
List roots = measureComponent(area, component, targetParent);
if (roots != null && !roots.isEmpty()) {
ViewInfo root = roots.get(0);
size.width = root.getRight() - root.getLeft();
size.height = root.getBottom() - root.getTop();
if (size.width != 0 && size.height != 0) {
// Apply canvas scale!
if (targetParent != null) {
return targetParent.fromModel(layer, size);
} else {
AndroidDesignerEditorPanel panel = getPanel(area);
if (panel != null) {
RadComponent rootComponent = panel.getRootComponent();
if (rootComponent != null) {
return rootComponent.fromModel(layer, size);
}
}
return size;
}
}
}
}
// Default size when we can't compute it
size.width = 100;
size.height = 30;
}
return size;
}
/**
* Measures the given component in the given editable area
*
* @param area the associated {@link EditableArea}
* @param component the component to measure
* @param targetParent if supplied, the target parent intended for the component
* (used to find namespace declarations and size for fill_parent sizes)
* @return the measured view info objects at the root level
*/
@Nullable
public static List measureComponent(@NotNull EditableArea area, @NotNull RadViewComponent component,
@Nullable RadComponent targetParent) {
XmlTag tag = component.getTag();
if (tag == null) {
String xml = null;
PaletteItem initialPaletteItem = component.getInitialPaletteItem();
if (initialPaletteItem != null) {
xml = initialPaletteItem.getCreation();
}
if (xml == null) {
xml = component.getCreationXml();
}
if (xml != null) {
String widthValue = VALUE_FILL_PARENT;
String heightValue = VALUE_FILL_PARENT;
// Look up the exact size of the parent, if any, such that fill_parent settings inherit the expected size
if (targetParent instanceof RadViewComponent && (xml.contains(VALUE_FILL_PARENT) || xml.contains(VALUE_MATCH_PARENT))) {
RadViewComponent parent = (RadViewComponent)targetParent;
Rectangle paddedBounds = parent.getPaddedBounds();
if (paddedBounds.width > 0 && paddedBounds.height > 0) {
widthValue = Integer.toString(paddedBounds.width) + UNIT_PX;
heightValue = Integer.toString(paddedBounds.height) + UNIT_PX;
}
}
StringBuilder sb = new StringBuilder(xml.length() + 200);
sb.append('<').append(FRAME_LAYOUT).append(' ').append(XMLNS_ANDROID).append("=\"").append(ANDROID_URI).append('"');
sb.append(' ').append(ANDROID_NS_NAME).append(':').append(ATTR_LAYOUT_WIDTH).append("=\"").append(widthValue).append('"');
sb.append(' ').append(ANDROID_NS_NAME).append(':').append(ATTR_LAYOUT_HEIGHT).append("=\"").append(heightValue).append('"');
// Copy in any other namespaces we may need from the root, such that custom views etc (if any) can refer to these
if (targetParent != null) {
RadComponent root = targetParent.getRoot();
if (root instanceof RadViewComponent) {
RadViewComponent viewRoot = (RadViewComponent)root;
XmlTag rootTag = viewRoot.getTag();
if (rootTag != null) {
for (XmlAttribute attribute : rootTag.getAttributes()) {
String name = attribute.getName();
if (name.startsWith(XMLNS_PREFIX) && !XMLNS_ANDROID.equals(name)) {
String value = attribute.getValue();
if (value != null && !value.isEmpty()) {
sb.append(' ').append(name).append("=\"");
XmlUtils.appendXmlAttributeValue(sb, value);
sb.append('"');
}
}
}
}
}
}
sb.append('>');
sb.append(xml);
sb.append('<').append('/').append(FRAME_LAYOUT).append('>');
Document document = XmlUtils.parseDocumentSilently(sb.toString(), true);
if (document != null && document.getDocumentElement() != null) {
RenderService service = getRenderService(area);
if (service != null) {
List roots = service.measure(document.getDocumentElement());
if (roots != null && !roots.isEmpty()) {
ViewInfo root = roots.get(0);
// Skip the outer layout we added to hold the XML
if (root.getClassName().equals(FQCN_FRAME_LAYOUT) && !root.getChildren().isEmpty()) {
return root.getChildren();
}
}
}
}
}
}
return null;
}
}
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