SpannableStringUtils.java

package com.youth.xframe.utils;

import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.support.annotation.ColorInt;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.Layout.Alignment;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.AlignmentSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.BulletSpan;
import android.text.style.ClickableSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.LeadingMarginSpan;
import android.text.style.MaskFilterSpan;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.ScaleXSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.SubscriptSpan;
import android.text.style.SuperscriptSpan;
import android.text.style.TypefaceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;

import com.youth.xframe.XFrame;

import static android.graphics.BlurMaskFilter.Blur;


public class XSpannableStringUtils {

    private XSpannableStringUtils() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    /**
     * 获取建造者
     *
     * @param text 样式字符串文本
     * @return {@link Builder}
     */
    public static Builder getBuilder(@NonNull CharSequence text) {
        return new Builder(text);
    }

    public static class Builder {

        private int defaultValue = 0x12000000;
        private CharSequence text;

        private int flag;
        @ColorInt
        private int foregroundColor;
        @ColorInt
        private int backgroundColor;
        @ColorInt
        private int quoteColor;

        private boolean isLeadingMargin;
        private int     first;
        private int     rest;

        private boolean isBullet;
        private int     gapWidth;
        private int     bulletColor;

        private float     proportion;
        private float     xProportion;
        private boolean   isStrikethrough;
        private boolean   isUnderline;
        private boolean   isSuperscript;
        private boolean   isSubscript;
        private boolean   isBold;
        private boolean   isItalic;
        private boolean   isBoldItalic;
        private String    fontFamily;
        private Alignment align;

        private boolean  imageIsBitmap;
        private Bitmap   bitmap;
        private boolean  imageIsDrawable;
        private Drawable drawable;
        private boolean  imageIsUri;
        private Uri      uri;
        private boolean  imageIsResourceId;
        @DrawableRes
        private int      resourceId;

        private ClickableSpan clickSpan;
        private String        url;

        private boolean isBlur;
        private float   radius;
        private Blur    style;

        private SpannableStringBuilder mBuilder;


        private Builder(@NonNull CharSequence text) {
            this.text = text;
            flag = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
            foregroundColor = defaultValue;
            backgroundColor = defaultValue;
            quoteColor = defaultValue;
            proportion = -1;
            xProportion = -1;
            mBuilder = new SpannableStringBuilder();
        }

        /**
         * 设置标识
         *
         * @param flag <ul>
         *             <li>{@link Spanned#SPAN_INCLUSIVE_EXCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_INCLUSIVE_INCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_EXCLUSIVE_EXCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_EXCLUSIVE_INCLUSIVE}</li>
         *             </ul>
         * @return {@link Builder}
         */
        public Builder setFlag(int flag) {
            this.flag = flag;
            return this;
        }

        /**
         * 设置前景色
         *
         * @param color 前景色
         * @return {@link Builder}
         */
        public Builder setForegroundColor(@ColorInt int color) {
            this.foregroundColor = color;
            return this;
        }

        /**
         * 设置背景色
         *
         * @param color 背景色
         * @return {@link Builder}
         */
        public Builder setBackgroundColor(@ColorInt int color) {
            this.backgroundColor = color;
            return this;
        }

        /**
         * 设置引用线的颜色
         *
         * @param color 引用线的颜色
         * @return {@link Builder}
         */
        public Builder setQuoteColor(@ColorInt int color) {
            this.quoteColor = color;
            return this;
        }

        /**
         * 设置缩进
         *
         * @param first 首行缩进
         * @param rest  剩余行缩进
         * @return {@link Builder}
         */
        public Builder setLeadingMargin(int first, int rest) {
            this.first = first;
            this.rest = rest;
            isLeadingMargin = true;
            return this;
        }

        /**
         * 设置列表标记
         *
         * @param gapWidth 列表标记和文字间距离
         * @param color    列表标记的颜色
         * @return {@link Builder}
         */
        public Builder setBullet(int gapWidth, int color) {
            this.gapWidth = gapWidth;
            bulletColor = color;
            isBullet = true;
            return this;
        }

        /**
         * 设置字体比例
         *
         * @param proportion 比例
         * @return {@link Builder}
         */
        public Builder setProportion(float proportion) {
            this.proportion = proportion;
            return this;
        }

        /**
         * 设置字体横向比例
         *
         * @param proportion 比例
         * @return {@link Builder}
         */
        public Builder setXProportion(float proportion) {
            this.xProportion = proportion;
            return this;
        }

        /**
         * 设置删除线
         *
         * @return {@link Builder}
         */
        public Builder setStrikethrough() {
            this.isStrikethrough = true;
            return this;
        }

        /**
         * 设置下划线
         *
         * @return {@link Builder}
         */
        public Builder setUnderline() {
            this.isUnderline = true;
            return this;
        }

        /**
         * 设置上标
         *
         * @return {@link Builder}
         */
        public Builder setSuperscript() {
            this.isSuperscript = true;
            return this;
        }

        /**
         * 设置下标
         *
         * @return {@link Builder}
         */
        public Builder setSubscript() {
            this.isSubscript = true;
            return this;
        }

        /**
         * 设置粗体
         *
         * @return {@link Builder}
         */
        public Builder setBold() {
            isBold = true;
            return this;
        }

        /**
         * 设置斜体
         *
         * @return {@link Builder}
         */
        public Builder setItalic() {
            isItalic = true;
            return this;
        }

        /**
         * 设置粗斜体
         *
         * @return {@link Builder}
         */
        public Builder setBoldItalic() {
            isBoldItalic = true;
            return this;
        }

        /**
         * 设置字体
         *
         * @param fontFamily 字体
         *                   <ul>
         *                   <li>monospace</li>
         *                   <li>serif</li>
         *                   <li>sans-serif</li>
         *                   </ul>
         * @return {@link Builder}
         */
        public Builder setFontFamily(@Nullable String fontFamily) {
            this.fontFamily = fontFamily;
            return this;
        }

        /**
         * 设置对齐
         *
         * @param align 对其方式
         *              <ul>
         *              <li>{@link Alignment#ALIGN_NORMAL}正常</li>
         *              <li>{@link Alignment#ALIGN_OPPOSITE}相反</li>
         *              <li>{@link Alignment#ALIGN_CENTER}居中</li>
         *              </ul>
         * @return {@link Builder}
         */
        public Builder setAlign(@Nullable Alignment align) {
            this.align = align;
            return this;
        }

        /**
         * 设置图片
         *
         * @param bitmap 图片位图
         * @return {@link Builder}
         */
        public Builder setBitmap(@NonNull Bitmap bitmap) {
            this.bitmap = bitmap;
            imageIsBitmap = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param drawable 图片资源
         * @return {@link Builder}
         */
        public Builder setDrawable(@NonNull Drawable drawable) {
            this.drawable = drawable;
            imageIsDrawable = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param uri 图片uri
         * @return {@link Builder}
         */
        public Builder setUri(@NonNull Uri uri) {
            this.uri = uri;
            imageIsUri = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param resourceId 图片资源id
         * @return {@link Builder}
         */
        public Builder setResourceId(@DrawableRes int resourceId) {
            this.resourceId = resourceId;
            imageIsResourceId = true;
            return this;
        }

        /**
         * 设置点击事件
         * <p>需添加view.setMovementMethod(LinkMovementMethod.getInstance())</p>
         *
         * @param clickSpan 点击事件
         * @return {@link Builder}
         */
        public Builder setClickSpan(@NonNull ClickableSpan clickSpan) {
            this.clickSpan = clickSpan;
            return this;
        }

        /**
         * 设置超链接
         * <p>需添加view.setMovementMethod(LinkMovementMethod.getInstance())</p>
         *
         * @param url 超链接
         * @return {@link Builder}
         */
        public Builder setUrl(@NonNull String url) {
            this.url = url;
            return this;
        }

        /**
         * 设置模糊
         * <p>尚存bug，其他地方存在相同的字体的话，相同字体出现在之前的话那么就不会模糊，出现在之后的话那会一起模糊</p>
         * <p>推荐还是把所有字体都模糊这样使用</p>
         *
         * @param radius 模糊半径（需大于0）
         * @param style  模糊样式<ul>
         *               <li>{@link Blur#NORMAL}</li>
         *               <li>{@link Blur#SOLID}</li>
         *               <li>{@link Blur#OUTER}</li>
         *               <li>{@link Blur#INNER}</li>
         *               </ul>
         * @return {@link Builder}
         */
        public Builder setBlur(float radius, Blur style) {
            this.radius = radius;
            this.style = style;
            this.isBlur = true;
            return this;
        }

        /**
         * 追加样式字符串
         *
         * @param text 样式字符串文本
         * @return {@link Builder}
         */
        public Builder append(@NonNull CharSequence text) {
            setSpan();
            this.text = text;
            return this;
        }

        /**
         * 创建样式字符串
         *
         * @return 样式字符串
         */
        public SpannableStringBuilder create() {
            setSpan();
            return mBuilder;
        }

        /**
         * 设置样式
         */
        private void setSpan() {
            int start = mBuilder.length();
            mBuilder.append(this.text);
            int end = mBuilder.length();
            if (foregroundColor != defaultValue) {
                mBuilder.setSpan(new ForegroundColorSpan(foregroundColor), start, end, flag);
                foregroundColor = defaultValue;
            }
            if (backgroundColor != defaultValue) {
                mBuilder.setSpan(new BackgroundColorSpan(backgroundColor), start, end, flag);
                backgroundColor = defaultValue;
            }
            if (isLeadingMargin) {
                mBuilder.setSpan(new LeadingMarginSpan.Standard(first, rest), start, end, flag);
                isLeadingMargin = false;
            }
            if (quoteColor != defaultValue) {
                mBuilder.setSpan(new QuoteSpan(quoteColor), start, end, 0);
                quoteColor = defaultValue;
            }
            if (isBullet) {
                mBuilder.setSpan(new BulletSpan(gapWidth, bulletColor), start, end, 0);
                isBullet = false;
            }
            if (proportion != -1) {
                mBuilder.setSpan(new RelativeSizeSpan(proportion), start, end, flag);
                proportion = -1;
            }
            if (xProportion != -1) {
                mBuilder.setSpan(new ScaleXSpan(xProportion), start, end, flag);
                xProportion = -1;
            }
            if (isStrikethrough) {
                mBuilder.setSpan(new StrikethroughSpan(), start, end, flag);
                isStrikethrough = false;
            }
            if (isUnderline) {
                mBuilder.setSpan(new UnderlineSpan(), start, end, flag);
                isUnderline = false;
            }
            if (isSuperscript) {
                mBuilder.setSpan(new SuperscriptSpan(), start, end, flag);
                isSuperscript = false;
            }
            if (isSubscript) {
                mBuilder.setSpan(new SubscriptSpan(), start, end, flag);
                isSubscript = false;
            }
            if (isBold) {
                mBuilder.setSpan(new StyleSpan(Typeface.BOLD), start, end, flag);
                isBold = false;
            }
            if (isItalic) {
                mBuilder.setSpan(new StyleSpan(Typeface.ITALIC), start, end, flag);
                isItalic = false;
            }
            if (isBoldItalic) {
                mBuilder.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), start, end, flag);
                isBoldItalic = false;
            }
            if (fontFamily != null) {
                mBuilder.setSpan(new TypefaceSpan(fontFamily), start, end, flag);
                fontFamily = null;
            }
            if (align != null) {
                mBuilder.setSpan(new AlignmentSpan.Standard(align), start, end, flag);
                align = null;
            }
            if (imageIsBitmap || imageIsDrawable || imageIsUri || imageIsResourceId) {
                if (imageIsBitmap) {
                    mBuilder.setSpan(new ImageSpan(XFrame.getContext(), bitmap), start, end, flag);
                    bitmap = null;
                    imageIsBitmap = false;
                } else if (imageIsDrawable) {
                    mBuilder.setSpan(new ImageSpan(drawable), start, end, flag);
                    drawable = null;
                    imageIsDrawable = false;
                } else if (imageIsUri) {
                    mBuilder.setSpan(new ImageSpan(XFrame.getContext(), uri), start, end, flag);
                    uri = null;
                    imageIsUri = false;
                } else {
                    mBuilder.setSpan(new ImageSpan(XFrame.getContext(), resourceId), start, end, flag);
                    resourceId = 0;
                    imageIsResourceId = false;
                }
            }
            if (clickSpan != null) {
                mBuilder.setSpan(clickSpan, start, end, flag);
                clickSpan = null;
            }
            if (url != null) {
                mBuilder.setSpan(new URLSpan(url), start, end, flag);
                url = null;
            }
            if (isBlur) {
                mBuilder.setSpan(new MaskFilterSpan(new BlurMaskFilter(radius, style)), start, end, flag);
                isBlur = false;
            }
            flag = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
        }
    }
}