com.android.tools.idea.uibuilder.property.NlPropertiesGrouper.java Source code

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Here is the source code for com.android.tools.idea.uibuilder.property.NlPropertiesGrouper.java

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/*
 * Copyright (C) 2015 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.tools.idea.uibuilder.property;

import com.android.tools.idea.uibuilder.model.NlComponent;
import com.android.tools.idea.uibuilder.property.NlPropertyAccumulator.PropertyNamePrefixAccumulator;
import com.android.tools.idea.uibuilder.property.ptable.PTableItem;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.List;

import static com.android.SdkConstants.*;

public class NlPropertiesGrouper {
    public List<PTableItem> group(@NotNull List<NlPropertyItem> properties, @NotNull List<NlComponent> components) {
        String className = getCommonTagName(components);

        List<PTableItem> result = Lists.newArrayListWithExpectedSize(properties.size());

        // group theme attributes together
        NlPropertyAccumulator themePropertiesAccumulator = new NlPropertyAccumulator("Theme", p -> p != null
                && (p.getParentStylables().contains("Theme") || p.getName().equalsIgnoreCase("theme")));

        // Disable this for now...
        //
        // group attributes that correspond to this component together
        //NlPropertyAccumulator customViewPropertiesAccumulator = null;
        //if (className != null) {
        //  customViewPropertiesAccumulator = new NlPropertyAccumulator(className, p -> p != null && p.getParentStylables().contains(className));
        //}

        // group margin, padding and layout attributes together
        NlPropertyAccumulator paddingPropertiesAccumulator = new NlMarginPropertyAccumulator("Padding",
                ATTR_PADDING, ATTR_PADDING_LEFT, ATTR_PADDING_RIGHT, ATTR_PADDING_START, ATTR_PADDING_END,
                ATTR_PADDING_TOP, ATTR_PADDING_BOTTOM);
        NlPropertyAccumulator layoutViewPropertiesAccumulator = new NlMarginPropertyAccumulator("Layout_Margin",
                ATTR_LAYOUT_MARGIN, ATTR_LAYOUT_MARGIN_LEFT, ATTR_LAYOUT_MARGIN_RIGHT, ATTR_LAYOUT_MARGIN_START,
                ATTR_LAYOUT_MARGIN_END, ATTR_LAYOUT_MARGIN_TOP, ATTR_LAYOUT_MARGIN_BOTTOM);

        PropertyNamePrefixAccumulator constraintPropertiesAccumulator = new PropertyNamePrefixAccumulator(
                "Constraints", "layout_constraint");

        List<NlPropertyAccumulator> accumulators = Lists.newArrayList(themePropertiesAccumulator,
                paddingPropertiesAccumulator, layoutViewPropertiesAccumulator, constraintPropertiesAccumulator);

        for (NlPropertyItem p : properties) {
            boolean added = false;
            for (NlPropertyAccumulator accumulator : accumulators) {
                added = accumulator.process(p);
                if (added) {
                    break;
                }
            }

            if (!added) {
                result.add(p);
            }
        }

        int insertionPoint = findInsertionPoint(result);

        for (NlPropertyAccumulator accumulator : accumulators) {
            if (accumulator.hasItems()) {
                result.add(insertionPoint, accumulator.getGroupNode());
            }
        }

        return result;
    }

    @Nullable
    public static String getCommonTagName(@NotNull List<NlComponent> components) {
        String commonTagName = null;
        for (NlComponent component : components) {
            String tagName = component.getTagName();
            if (commonTagName == null) {
                commonTagName = tagName;
            } else if (!tagName.equals(commonTagName)) {
                return null;
            }
        }
        return commonTagName;
    }

    private static List<String> MOST_IMPORTANT_ATTRIBUTES = ImmutableList.of(ATTR_ID, ATTR_LAYOUT_WIDTH,
            ATTR_LAYOUT_HEIGHT);

    private static int findInsertionPoint(@NotNull List<PTableItem> properties) {
        for (int index = 0; index < MOST_IMPORTANT_ATTRIBUTES.size(); index++) {
            if (properties.size() < index + 1
                    || !properties.get(index).getName().equals(MOST_IMPORTANT_ATTRIBUTES.get(index))) {
                return index;
            }
        }
        return MOST_IMPORTANT_ATTRIBUTES.size();
    }
}