Merge pull request #103 from POLZZAK/feat/easy-spannable

[FEAT] SpannableBuilder 클래스 구현

app/src/main/java/com/polzzak_android/presentation/common/util/SpannableBuilder.kt

@@ -0,0 +1,63 @@
+package com.polzzak_android.presentation.common.util
+
+import android.content.Context
+import android.text.Spannable
+import android.text.SpannableStringBuilder
+import android.text.style.BackgroundColorSpan
+import android.text.style.ForegroundColorSpan
+import android.text.style.TextAppearanceSpan
+import android.text.style.UnderlineSpan
+import androidx.annotation.ColorRes
+import androidx.annotation.StyleRes
+import androidx.core.text.set
+import androidx.core.text.toSpannable
+
+/**
+ * [Spannable]을 쉽게 만들 수 있게 해주는 유틸 클래스.
+ *
+ * 사용 예:
+ * ```
+ * val spannable = SpannableBuilder.build(context) {
+ *      span(text = "안녕", textColor = R.color.Red, style = R.style.title)
+ *      span(text = "하세요", textColor = R.color.Bule, underline = true)
+ * }
+ * ```
+ */
+class SpannableBuilder private constructor(
+    private val context: Context,
+    private val spannableBuilder: SpannableStringBuilder = SpannableStringBuilder()
+) {
+    fun span(
+        text: String,
+        @StyleRes style: Int = -1,
+        @ColorRes textColor: Int = -1,
+        @ColorRes backgroundColor: Int = -1,
+        underline: Boolean = false
+    ) {
+        val startIndex = spannableBuilder.length
+        val endIndex = startIndex + text.length
+
+        spannableBuilder.append(text)
+
+        if (style != -1) {
+            spannableBuilder[startIndex..endIndex] = TextAppearanceSpan(context, style)
+        }
+        if (textColor != -1) {
+            spannableBuilder[startIndex..endIndex] = ForegroundColorSpan(context.getColor(textColor))
+        }
+        if (backgroundColor != -1) {
+            spannableBuilder[startIndex..endIndex] = BackgroundColorSpan(context.getColor(backgroundColor))
+        }
+        if (underline) {
+            spannableBuilder[startIndex..endIndex] = UnderlineSpan()
+        }
+    }
+
+    companion object {
+        fun build(context: Context, block: SpannableBuilder.() -> Unit): Spannable {
+            return SpannableBuilder(context)
+                .apply { block() }
+                .spannableBuilder.toSpannable()
+        }
+    }
+}