Pawanyadav1
commented
2 years ago package com.maestros.twikimodels.hashtagview;
import android.animation.LayoutTransition; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.TypedArray; import android.graphics.Color; import android.graphics.Typeface; import android.graphics.drawable.Drawable;
import android.text.TextUtils; import android.util.AttributeSet; import android.util.SparseArray; import android.util.TypedValue; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewTreeObserver; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.TextView;
import androidx.annotation.ColorRes; import androidx.annotation.DimenRes; import androidx.annotation.DrawableRes; import androidx.annotation.IntDef; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.core.content.ContextCompat;
import com.google.common.collect.ArrayListMultimap; import com.google.common.collect.Multimap; import com.maestros.twikimodels.R;
import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.Iterator; import java.util.List;
public class HashtagView extends LinearLayout {
@IntDef({GRAVITY_LEFT, GRAVITY_CENTER, GRAVITY_RIGHT})
@Retention(RetentionPolicy.SOURCE)
public @interface GravityMode {
}
@SuppressLint("RtlHardcoded")
public static final int GRAVITY_LEFT = Gravity.LEFT;
@SuppressLint("RtlHardcoded")
public static final int GRAVITY_RIGHT = Gravity.RIGHT;
public static final int GRAVITY_CENTER = Gravity.CENTER;
@IntDef({MODE_WRAP, MODE_STRETCH, MODE_EQUAL})
@Retention(RetentionPolicy.SOURCE)
public @interface StretchMode {
}
public static final int MODE_WRAP = 0;
public static final int MODE_STRETCH = 1;
public static final int MODE_EQUAL = 2;
@IntDef({DISTRIBUTION_LEFT, DISTRIBUTION_MIDDLE, DISTRIBUTION_RIGHT, DISTRIBUTION_RANDOM, DISTRIBUTION_NONE})
@Retention(RetentionPolicy.SOURCE)
public @interface RowDistribution {
}
public static final int DISTRIBUTION_LEFT = 0;
public static final int DISTRIBUTION_MIDDLE = 1;
public static final int DISTRIBUTION_RIGHT = 2;
public static final int DISTRIBUTION_RANDOM = 3;
public static final int DISTRIBUTION_NONE = 4;
@IntDef({ELLIPSIZE_START, ELLIPSIZE_MIDDLE, ELLIPSIZE_END, ELLIPSIZE_MARQUEE})
@Retention(RetentionPolicy.SOURCE)
public @interface Ellipsize {
}
public static final int ELLIPSIZE_START = 0;
public static final int ELLIPSIZE_MIDDLE = 1;
public static final int ELLIPSIZE_END = 2;
public static final int ELLIPSIZE_MARQUEE = 3;
@IntDef({COMPOSE_ORIGIN, COMPOSE_LINEAR})
@Retention(RetentionPolicy.SOURCE)
public @interface Compose {
}
public static final int COMPOSE_ORIGIN = 0;
public static final int COMPOSE_LINEAR = 1;
private static final SparseArray<TextUtils.TruncateAt> ellipsizeList = new SparseArray<>(4);
static {
ellipsizeList.put(ELLIPSIZE_START, TextUtils.TruncateAt.START);
ellipsizeList.put(ELLIPSIZE_MIDDLE, TextUtils.TruncateAt.MIDDLE);
ellipsizeList.put(ELLIPSIZE_END, TextUtils.TruncateAt.END);
ellipsizeList.put(ELLIPSIZE_MARQUEE, TextUtils.TruncateAt.MARQUEE);
}
private final LayoutParams rowLayoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
private final LayoutParams itemLayoutParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
private final FrameLayout.LayoutParams itemFrameParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
private LayoutTransition layoutTransition;
private List<TagsClickListener> clickListeners;
private List<TagsSelectListener> selectListeners;
private List<Float> widthList;
private List<ItemData> data;
private Multimap<Integer, ItemData> viewMap;
private SortState sortState = SortState.initState();
private ColorStateList itemTextColorStateList;
private int itemMargin;
private int itemPaddingLeft;
private int itemPaddingRight;
private int itemPaddingTop;
private int itemPaddingBottom;
private int itemDrawablePadding;
private int minItemWidth;
private int maxItemWidth;
private int itemTextGravity;
private int itemTextEllipsize;
private float itemTextSize;
private int rowMargin;
private int rowGravity;
private int rowDistribution;
private int rowMode;
private int rowCount;
private int composeMode;
private int backgroundDrawable;
private int foregroundDrawable;
private int leftDrawable;
private int leftSelectedDrawable;
private int rightDrawable;
private int rightSelectedDrawable;
private Typeface typeface;
private float totalItemsWidth;
private int selectionLimit = -1;
private int selectedItemsCount = 0;
private boolean isInSelectMode;
private boolean isDynamic;
private DataTransform transformer = (DataTransform) DefaultTransform.newInstance();
private DataSelector selector = (DataSelector) DefaultSelector.newInstance();
private ComposeHelper composeHelper;
private final ViewTreeObserver.OnPreDrawListener preDrawListener = new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if (isPrepared()) {
wrap();
sort();
draw();
getViewTreeObserver().removeOnPreDrawListener(preDrawListener);
}
return true;
}
};
public HashtagView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
setOrientation(VERTICAL);
setGravity(Gravity.CENTER_HORIZONTAL);
extractAttributes(attrs);
prepareLayoutParams();
prepareLayoutTransition();
prepareComposeHelper();
widthList = new ArrayList<>();
data = new ArrayList<>();
}
/**
* Method returns data that was set previously for that view.
*
* @return list of original data items
*/
@SuppressWarnings("unchecked")
public <T> List<T> getData() {
List<T> list = new ArrayList<>();
if (viewMap != null && !viewMap.isEmpty()) {
for (ItemData itemData : viewMap.values()) {
list.add(((T) itemData.data));
}
}
return list;
}
/**
* Method defines data as simple {@link java.lang.String} array. Using this method makes not
* possible to use {@link android.text.Spannable} for representing items label.
*
* @param list {@link java.lang.String} array representing data collection.
*/
public <T> void setData(@NonNull List<T> list) {
widthList.clear();
data.clear();
if (list.isEmpty()) {
removeAllViews();
return;
}
for (T item : list) {
data.add(new ItemData<>(item));
}
getViewTreeObserver().addOnPreDrawListener(preDrawListener);
}
/**
* Method defines data as an array of custom data model. Using this method allow you
* to use {@link android.text.Spannable} for representing items label.
*
* @param list Array of user defined objects representing data collection.
* @param transformer Implementation of {@link com.greenfrvr.hashtagview.HashtagView.DataTransform} or
* {@link com.greenfrvr.hashtagview.HashtagView.DataStateTransform}
* interface. Can be used for building label from several custom data model
* fields or to prepare {@link android.text.Spannable} label representation.
* @param <T> Custom data model
*/
public <T> void setData(@NonNull List<T> list, @NonNull DataTransform<T> transformer) {
this.transformer = transformer;
setData(list);
}
/**
* Method defines data as an array of custom data model. Using this method allow you
* to use {@link android.text.Spannable} for representing items label and define which items
* should be preselected items.
*
* @param list Array of user defined objects representing data collection.
* @param transformer Implementation of {@link com.greenfrvr.hashtagview.HashtagView.DataTransform} or
* {@link com.greenfrvr.hashtagview.HashtagView.DataStateTransform}
* interface. Can be used for building label from several custom data model
* fields or to prepare {@link android.text.Spannable} label representation.
* @param selector Implementation of {@link com.greenfrvr.hashtagview.HashtagView.DataSelector}
* interface. Can be used to preselect some items.
* @param <T> Custom data model
*/
public <T> void setData(@NonNull List<T> list, @NonNull DataTransform<T> transformer, @NonNull DataSelector<T> selector) {
this.selector = selector;
setData(list, transformer);
}
/**
* Dynamically adds new item to a widget.
*
* @param item Object representing new item to be added
* @param <T> Custom data model class
* @return true if item was added successfully, false otherwise (for example the item
* has been already presented)
*/
public <T> boolean addItem(@NonNull T item) {
if (!isDynamic) return false;
ItemData itemData = new ItemData<>(item);
if (viewMap != null && viewMap.values().contains(itemData)) return false;
if (viewMap != null) {
data.addAll(viewMap.values());
viewMap.clear();
}
data.add(itemData);
getViewTreeObserver().addOnPreDrawListener(preDrawListener);
return true;
}
/**
* Dynamically removes given item from a widget if it is already presented in a widget.
*
* @param item Object representing item to be removed
* @param <T> Custom data model class
* @return true if item was removed successfully, false otherwise (for example there
* was no item to remove)
*/
public <T> boolean removeItem(@NonNull T item) {
if (!isDynamic || viewMap == null || viewMap.isEmpty()) return false;
ItemData itemData = new ItemData<>(item);
if (!viewMap.values().contains(itemData)) return false;
data.addAll(viewMap.values());
data.remove(itemData);
if (data.isEmpty()) removeAllViews();
viewMap.clear();
getViewTreeObserver().addOnPreDrawListener(preDrawListener);
return true;
}
/**
* Dynamically removes all previously added items from a widget.
*
* @return true if item was removed successfully, false otherwise (for example there
* was no item to remove)
*/
public boolean removeAll() {
if (!isDynamic || viewMap == null || viewMap.isEmpty()) return false;
data.clear();
viewMap.clear();
removeAllViews();
return true;
}
/**
* @param transformer Implementation of {@link com.greenfrvr.hashtagview.HashtagView.DataTransform} or
* {@link com.greenfrvr.hashtagview.HashtagView.DataStateTransform}
* interface. Can be used for building label from several custom data model
* fields or to prepare {@link android.text.Spannable} label representation.
* @param <T> Custom data model
*/
public <T> void setTransformer(@NonNull DataTransform<T> transformer) {
this.transformer = transformer;
}
/**
* @return List of selected items. Consists of objects corresponding to custom data model defined by setData() method
*/
@SuppressWarnings("unchecked")
public <T> List<T> getSelectedItems() {
List<T> selected = new ArrayList<>();
if (viewMap != null && !viewMap.isEmpty()) {
for (ItemData item : viewMap.values()) {
if (item.isSelected) selected.add((T) item.data);
}
}
return selected;
}
/**
* Adding single item click listener
*
* @param listener {@link com.greenfrvr.hashtagview.HashtagView.TagsClickListener}
*/
public void addOnTagClickListener(TagsClickListener listener) {
if (clickListeners == null) {
clickListeners = new ArrayList<>();
}
clickListeners.add(listener);
}
/**
* Removing single item click listener
*
* @param listener {@link com.greenfrvr.hashtagview.HashtagView.TagsClickListener}
*/
public void removeOnTagClickListener(TagsClickListener listener) {
if (clickListeners != null) {
clickListeners.remove(listener);
}
}
/**
* Adding selection items listener
*
* @param listener {@link com.greenfrvr.hashtagview.HashtagView.TagsSelectListener}
*/
public void addOnTagSelectListener(TagsSelectListener listener) {
if (selectListeners == null) {
selectListeners = new ArrayList<>();
}
selectListeners.add(listener);
}
/**
* Removing selection items listener
*
* @param listener {@link com.greenfrvr.hashtagview.HashtagView.TagsSelectListener}
*/
public void removeOnTagSelectListener(TagsSelectListener listener) {
if (selectListeners != null) {
selectListeners.remove(listener);
}
}
/**
* Removing all defined listeners
*/
public void removeListeners() {
if (clickListeners != null) {
clickListeners.clear();
}
if (selectListeners != null) {
selectListeners.clear();
}
}
public int getSelectionLimit() {
return selectionLimit;
}
public void setSelectionLimit(int selectionLimit) {
this.selectionLimit = selectionLimit > 0 ? selectionLimit : -1;
if (viewMap != null) {
for (ItemData item : viewMap.values()) {
item.isSelected = false;
item.displaySelection(leftDrawable, leftSelectedDrawable, rightDrawable, rightSelectedDrawable);
item.decorateText(transformer);
}
}
}
public void setItemMargin(int itemMargin) {
this.itemMargin = itemMargin;
}
public void setItemMarginRes(@DimenRes int marginRes) {
this.itemMargin = getResources().getDimensionPixelOffset(marginRes);
}
public void setItemPadding(int left, int right, int top, int bottom) {
this.itemPaddingLeft = left;
this.itemPaddingRight = right;
this.itemPaddingTop = top;
this.itemPaddingBottom = bottom;
}
public void setItemPaddingRes(@DimenRes int left, @DimenRes int right, @DimenRes int top, @DimenRes int bottom) {
this.itemPaddingLeft = getResources().getDimensionPixelOffset(left);
this.itemPaddingRight = getResources().getDimensionPixelOffset(right);
this.itemPaddingTop = getResources().getDimensionPixelOffset(top);
this.itemPaddingBottom = getResources().getDimensionPixelOffset(bottom);
}
public void setMinItemWidth(int minWidth) {
this.minItemWidth = minWidth;
}
public void setMinItemWidthRes(@DimenRes int minWidth) {
this.minItemWidth = getResources().getDimensionPixelOffset(minWidth);
}
public void setMaxItemWidth(int maxWidth) {
this.maxItemWidth = maxWidth;
}
public void setMaxItemWidthRes(@DimenRes int maxWidth) {
this.maxItemWidth = getResources().getDimensionPixelOffset(maxWidth);
}
public void setItemTextColor(int textColor) {
this.itemTextColorStateList = ColorStateList.valueOf(textColor);
}
public void setItemTextColorRes(@ColorRes int textColor) {
int colorValue = ContextCompat.getColor(getContext(), textColor);
this.itemTextColorStateList = ColorStateList.valueOf(colorValue);
}
public void setItemTextColorStateList(ColorStateList stateList) {
this.itemTextColorStateList = stateList;
}
public void setItemTextColorStateListRes(@ColorRes int colorStateRes) {
this.itemTextColorStateList = ContextCompat.getColorStateList(getContext(), colorStateRes);
}
public void setItemTextGravity(int itemTextGravity) {
this.itemTextGravity = itemTextGravity;
}
public void setItemTextSize(float textSize) {
this.itemTextSize = textSize;
}
public void setItemTextSizeRes(@DimenRes int textSize) {
this.itemTextSize = getResources().getDimension(textSize);
}
public void setRowMargin(int rowMargin) {
this.rowMargin = rowMargin;
}
public void setRowMarginRes(@DimenRes int rowMargin) {
this.rowMargin = getResources().getDimensionPixelOffset(rowMargin);
}
public void setRowGravity(@GravityMode int rowGravity) {
this.rowGravity = rowGravity;
}
public void setRowMode(@StretchMode int rowMode) {
this.rowMode = rowMode;
}
public void setRowDistribution(@RowDistribution int rowDistribution) {
this.rowDistribution = rowDistribution;
}
public void setComposeMode(@Compose int composeMode) {
this.composeMode = composeMode;
prepareComposeHelper();
}
public void setRowCount(int count) {
if (count >= 0) this.rowCount = count;
}
public void setBackgroundDrawable(@DrawableRes int backgroundDrawable) {
this.backgroundDrawable = backgroundDrawable;
}
public void setBackgroundColor(@ColorRes int backgroundDrawable) {
this.backgroundDrawable = backgroundDrawable;
}
public void setForegroundDrawable(@DrawableRes int foregroundDrawable) {
this.foregroundDrawable = foregroundDrawable;
}
public void setLeftDrawable(@DrawableRes int drawableRes) {
this.leftDrawable = drawableRes;
}
public void setLeftSelectedDrawable(@DrawableRes int drawableRes) {
this.leftSelectedDrawable = drawableRes;
}
public void setRightDrawable(@DrawableRes int drawableRes) {
this.rightDrawable = drawableRes;
}
public void setRightSelectedDrawable(@DrawableRes int drawableRes) {
this.rightSelectedDrawable = drawableRes;
}
public void setInSelectMode(boolean selectMode) {
isInSelectMode = selectMode;
}
public void setDynamicMode(boolean dynamicMode) {
isDynamic = dynamicMode;
}
public void setTypeface(Typeface typeface) {
this.typeface = typeface;
}
public void setEllipsize(@Ellipsize int ellipsizeMode) {
itemTextEllipsize = ellipsizeMode;
}
private void extractAttributes(AttributeSet attrs) {
TypedArray a = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.HashtagView, 0, 0);
try {
itemMargin = a.getDimensionPixelOffset(R.styleable.HashtagView_tagMargin, getResources().getDimensionPixelOffset(R.dimen.default_item_margin));
itemPaddingLeft = a.getDimensionPixelOffset(R.styleable.HashtagView_tagPaddingLeft, getResources().getDimensionPixelOffset(R.dimen.default_item_padding));
itemPaddingRight = a.getDimensionPixelOffset(R.styleable.HashtagView_tagPaddingRight, getResources().getDimensionPixelOffset(R.dimen.default_item_padding));
itemPaddingTop = a.getDimensionPixelOffset(R.styleable.HashtagView_tagPaddingTop, getResources().getDimensionPixelOffset(R.dimen.default_item_padding));
itemPaddingBottom = a.getDimensionPixelOffset(R.styleable.HashtagView_tagPaddingBottom, getResources().getDimensionPixelOffset(R.dimen.default_item_padding));
itemDrawablePadding = a.getDimensionPixelOffset(R.styleable.HashtagView_tagDrawablePadding, 0);
minItemWidth = a.getDimensionPixelOffset(R.styleable.HashtagView_tagMinWidth, getResources().getDimensionPixelOffset(R.dimen.min_item_width));
maxItemWidth = a.getDimensionPixelOffset(R.styleable.HashtagView_tagMaxWidth, getResources().getDimensionPixelOffset(R.dimen.min_item_width));
rowMargin = a.getDimensionPixelOffset(R.styleable.HashtagView_rowMargin, getResources().getDimensionPixelOffset(R.dimen.default_row_margin));
itemTextSize = a.getDimension(R.styleable.HashtagView_tagTextSize, getResources().getDimension(R.dimen.default_text_size));
itemTextGravity = a.getInt(R.styleable.HashtagView_tagTextGravity, Gravity.CENTER);
itemTextEllipsize = a.getInt(R.styleable.HashtagView_tagEllipsize, ELLIPSIZE_END);
rowGravity = a.getInt(R.styleable.HashtagView_rowGravity, Gravity.CENTER);
rowDistribution = a.getInt(R.styleable.HashtagView_rowDistribution, DISTRIBUTION_NONE);
rowMode = a.getInt(R.styleable.HashtagView_rowMode, MODE_WRAP);
rowCount = a.getInt(R.styleable.HashtagView_rowsQuantity, 0);
composeMode = a.getInt(R.styleable.HashtagView_composeMode, COMPOSE_ORIGIN);
backgroundDrawable = a.getResourceId(R.styleable.HashtagView_tagBackground, 0);
foregroundDrawable = a.getResourceId(R.styleable.HashtagView_tagForeground, 0);
leftDrawable = a.getResourceId(R.styleable.HashtagView_tagDrawableLeft, 0);
leftSelectedDrawable = a.getResourceId(R.styleable.HashtagView_tagSelectedDrawableLeft, 0);
rightDrawable = a.getResourceId(R.styleable.HashtagView_tagDrawableRight, 0);
rightSelectedDrawable = a.getResourceId(R.styleable.HashtagView_tagSelectedDrawableRight, 0);
itemTextColorStateList = a.getColorStateList(R.styleable.HashtagView_tagTextColor);
if (itemTextColorStateList == null) {
itemTextColorStateList = ColorStateList.valueOf(Color.BLACK);
}
isInSelectMode = a.getBoolean(R.styleable.HashtagView_selectionMode, false);
isDynamic = a.getBoolean(R.styleable.HashtagView_dynamicMode, false);
} finally {
a.recycle();
}
}
private void prepareLayoutParams() {
itemFrameParams.gravity = itemTextGravity;
itemLayoutParams.leftMargin = itemMargin;
itemLayoutParams.rightMargin = itemMargin;
itemLayoutParams.weight = rowMode > 0 ? 1 : 0;
if (MODE_EQUAL == rowMode) {
itemLayoutParams.width = 0;
}
rowLayoutParams.topMargin = rowMargin;
rowLayoutParams.bottomMargin = rowMargin;
}
private void prepareLayoutTransition() {
if (isDynamic) {
layoutTransition = new LayoutTransition();
layoutTransition.setStagger(LayoutTransition.APPEARING, 250);
layoutTransition.setAnimateParentHierarchy(false);
}
}
private void prepareComposeHelper() {
switch (composeMode) {
case COMPOSE_ORIGIN:
composeHelper = new OriginalComposer();
break;
case COMPOSE_LINEAR:
composeHelper = new LinearComposer();
break;
}
}
private boolean isPrepared() {
return getViewWidth() > 0 || rowCount > 0;
}
private void wrap() {
if (data == null || data.isEmpty()) return;
widthList.clear();
totalItemsWidth = 0;
for (ItemData item : data) {
wrapItem(item);
widthList.add(item.width);
totalItemsWidth += item.width;
}
composeHelper.prepareData();
}
private void wrapItem(ItemData item) {
View view = inflateItemView(item);
TextView itemView = (TextView) view.findViewById(R.id.text);
itemView.setText(transformer.prepare(item.data));
decorateItemTextView(itemView);
float width = itemView.getMeasuredWidth() + drawableMetrics(itemView) + totalOffset();
width = Math.max(width, minItemWidth);
width = Math.min(width, getViewWidth() - 2 * totalOffset());
item.view = view;
item.width = width;
setItemPreselected(item);
}
private void setItemPreselected(ItemData item) {
if (isInSelectMode) {
boolean selection = selector.preselect(item.data);
if (selection) {
if (selectionLimit == -1 || selectedItemsCount < selectionLimit) {
selectedItemsCount += 1;
} else {
return;
}
}
item.isSelected = selection;
item.decorateText(transformer);
item.displaySelection(leftDrawable, leftSelectedDrawable, rightDrawable, rightSelectedDrawable);
}
}
private void sort() {
if (data == null || data.isEmpty()) return;
evaluateRowsQuantity();
final int[] rowWidths = new int[sortState.totalRows()];
viewMap = ArrayListMultimap.create(sortState.totalRows(), data.size());
composeHelper.sortingLoop(0, sortState.rowCount, rowWidths, true);
if (sortState.hasExtraRows) {
composeHelper.sortingLoop(sortState.rowCount, sortState.totalRows(), rowWidths, false);
sortState.release();
}
}
private boolean extraCondition() {
return !(sortState.hasExtraRows && data.size() == sortState.extraCount);
}
private void draw() {
if (viewMap == null || viewMap.isEmpty()) return;
removeAllViews();
List<Integer> keys = new ArrayList<>(viewMap.keySet());
Collections.sort(keys);
for (Integer key : keys) {
ViewGroup rowLayout = getRowLayout(viewMap.get(key).size());
addView(rowLayout);
applyDistribution(viewMap.get(key));
rowLayout.setLayoutTransition(layoutTransition);
for (ItemData item : viewMap.get(key)) {
releaseParent(item.view);
rowLayout.addView(item.view, itemLayoutParams);
}
}
keys.clear();
}
private void releaseParent(View child) {
ViewGroup parent = (ViewGroup) child.getParent();
if (parent != null) {
parent.removeView(child);
}
}
private void applyDistribution(Collection<ItemData> list) {
switch (rowDistribution) {
case DISTRIBUTION_LEFT:
Collections.sort((List) list);
break;
case DISTRIBUTION_MIDDLE:
SortUtil.symmetricSort((List) list);
break;
case DISTRIBUTION_RIGHT:
Collections.sort((List) list, Collections.reverseOrder());
break;
case DISTRIBUTION_RANDOM:
Collections.shuffle((List) list);
break;
case DISTRIBUTION_NONE:
break;
}
}
private ViewGroup getRowLayout(int weightSum) {
LinearLayout rowLayout = new LinearLayout(getContext());
rowLayout.setLayoutParams(rowLayoutParams);
rowLayout.setOrientation(HORIZONTAL);
rowLayout.setGravity(rowGravity);
rowLayout.setWeightSum(weightSum);
return rowLayout;
}
private int getViewWidth() {
return getWidth() - getPaddingLeft() - getPaddingRight();
}
private int totalOffset() {
return itemPaddingLeft + itemPaddingRight + 2 * itemMargin;
}
private int drawableMetrics(TextView textView) {
int drawablesWidth = 0;
Drawable[] drawables = textView.getCompoundDrawables();
drawablesWidth += drawables[0] != null ? drawables[0].getIntrinsicWidth() + itemDrawablePadding : 0;
drawablesWidth += drawables[2] != null ? drawables[2].getIntrinsicWidth() + itemDrawablePadding : 0;
return drawablesWidth;
}
private void evaluateRowsQuantity() {
if (widthList == null || widthList.isEmpty()) return;
if (rowCount > 0) {
sortState.preserveState(rowCount);
return;
}
composeHelper.evaluateRowsQuantity();
}
private View inflateItemView(final ItemData item) {
ViewGroup itemLayout = (ViewGroup) LayoutInflater.from(getContext()).inflate(R.layout.layout_item, this, false);
itemLayout.setBackgroundResource(backgroundDrawable);
itemLayout.setPadding(itemPaddingLeft, itemPaddingTop, itemPaddingRight, itemPaddingBottom);
itemLayout.setMinimumWidth(minItemWidth);
try {
if (foregroundDrawable != 0)
((FrameLayout) itemLayout).setForeground(ContextCompat.getDrawable(getContext(), foregroundDrawable));
} catch (Exception e) {
e.printStackTrace();
}
itemLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (isInSelectMode) {
handleSelection(item);
} else {
handleClick(item);
}
}
});
return itemLayout;
}
private void decorateItemTextView(TextView textView) {
textView.setTextColor(itemTextColorStateList);
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, itemTextSize);
textView.setCompoundDrawablePadding(itemDrawablePadding);
textView.setCompoundDrawablesWithIntrinsicBounds(leftDrawable, 0, rightDrawable, 0);
textView.setEllipsize(ellipsizeList.get(itemTextEllipsize));
if (maxItemWidth > 0) textView.setMaxWidth(maxItemWidth);
if (typeface != null) textView.setTypeface(typeface);
textView.setLayoutParams(itemFrameParams);
textView.measure(0, 0);
}
private void handleSelection(ItemData item) {
if (item.isSelected) {
selectedItemsCount -= 1;
} else {
if (selectionLimit == -1 || selectedItemsCount < selectionLimit) {
selectedItemsCount += 1;
} else {
return;
}
}
item.select(leftDrawable, leftSelectedDrawable, rightDrawable, rightSelectedDrawable);
item.decorateText(transformer);
if (selectListeners != null) {
for (TagsSelectListener listener : selectListeners) {
listener.onItemSelected(item.data, item.isSelected);
}
}
}
private void handleClick(ItemData item) {
if (clickListeners != null) {
for (TagsClickListener listener : clickListeners) {
listener.onItemClicked(item.data);
}
}
}
private class OriginalComposer implements ComposeHelper {
@Override
public void prepareData() {
Collections.sort(data);
Collections.sort(widthList, Collections.reverseOrder());
}
@Override
public void evaluateRowsQuantity() {
int rows = (int) Math.ceil(totalItemsWidth / getViewWidth());
int[] rowsWidth = new int[rows];
int iterationLimit = rows + widthList.size();
int counter = 0;
sortState.preserveState(rows);
while (!widthList.isEmpty()) {
rowIteration:
for (int i = 0; i < rows; i++) {
if (counter > iterationLimit) {
sortState.preserveState(rows, true, widthList.size());
widthList.clear();
return;
}
counter++;
for (Float item : widthList) {
if (rowsWidth[i] + item <= getViewWidth()) {
rowsWidth[i] += item;
widthList.remove(item);
continue rowIteration;
}
}
}
}
}
@Override
public void sortingLoop(int start, int end, int[] widths, boolean hasExtra) {
while (!data.isEmpty() && (!hasExtra || extraCondition())) {
iteration:
for (int i = start; i < end; i++) {
Iterator<ItemData> iterator = data.iterator();
while (iterator.hasNext()) {
ItemData item = iterator.next();
if (rowCount > 0 || widths[i] + item.width <= getViewWidth()) {
widths[i] += item.width;
viewMap.put(i, item);
iterator.remove();
if (hasExtra) continue iteration;
}
}
}
}
}
}
private class LinearComposer implements ComposeHelper {
@Override
public void prepareData() {
}
@Override
public void evaluateRowsQuantity() {
}
@Override
public void sortingLoop(int start, int end, int[] widths, boolean hasExtra) {
if (data.isEmpty()) return;
int rowWidth = 0;
int index = start;
Iterator<ItemData> it = data.iterator();
while (it.hasNext()) {
ItemData item = it.next();
if (rowWidth + item.width > getViewWidth()) {
index++;
rowWidth = 0;
}
rowWidth += item.width;
viewMap.put(index, item);
it.remove();
}
}
}
private interface ComposeHelper {
void prepareData();
void evaluateRowsQuantity();
void sortingLoop(int start, int end, int[] widths, boolean hasExtra);
}
/**
* Listener used to handle item click events.
*/
public interface TagsClickListener {
void onItemClicked(Object item);
}
/**
* Listener used to handle item selection events.
*/
public interface TagsSelectListener {
void onItemSelected(Object item, boolean selected);
}
/**
* Prepare the formatting and appearance of data to be displayed on each item.
* As it returns {@link CharSequence}, item text can be represented as a {@link android.text.SpannableString}.
* Avoid using spans which may produce item width change (such as {@link android.text.style.BulletSpan} or {@link android.text.style.RelativeSizeSpan})
*/
public interface DataTransform<T> {
CharSequence prepare(T item);
}
/**
* Prepare the formatting and appearance of data to be displayed on each item, for both selected and
* non-selected state.
* As it returns {@link CharSequence}, item text can be represented as a {@link android.text.SpannableString}.
* Avoid using spans which may produce item width change (such as {@link android.text.style.BulletSpan} or {@link android.text.style.RelativeSizeSpan})
*/
public interface DataStateTransform<T> extends DataTransform<T> {
CharSequence prepareSelected(T item);
}
/**
* Allows to define whether item should be preselected or not. Returning true (or false) for exact
* item will cause initial state of this item to be set to selected (or unselected).
*/
public interface DataSelector<T> {
boolean preselect(T item);
}
private static class SortState {
boolean hasExtraRows = false;
int extraCount = 0;
int rowCount = 0;
static SortState initState() {
return new SortState();
}
int totalRows() {
return (hasExtraRows ? extraCount : 0) + rowCount;
}
void preserveState(int rowCount, boolean needsExtraRow, int extraCount) {
this.rowCount = rowCount;
this.hasExtraRows = needsExtraRow;
this.extraCount = extraCount;
}
void preserveState(int rowCount) {
preserveState(rowCount, false, 0);
}
void release() {
preserveState(0);
}
}}
What would be a neat way to add and remove tags graphically? How could I keep one editable Tag at the end of the list to add another item?