import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import android.util.Log
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.text.ClickableText
import androidx.compose.foundation.text.selection.DisableSelection
import androidx.compose.foundation.text.selection.SelectionContainer
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.*
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp

class Compose_04Activity : ComponentActivity(){

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            compose_04()

        }
    }
}

@Composable
fun compose_04(){
    Column(modifier = Modifier.padding(10.dp)) {

        // 设置字号
        Text(text = "我是14sp\n", fontSize = 14.sp)

        // 设置颜色
        Text(text = "我是红色\n", color = Color.Red)

        // 设置粗体
        Text(text = "我是粗体\n", fontWeight = FontWeight.Bold)

        // 设置剧中对齐
        Text(text = "我是居中对齐\n", textAlign = TextAlign.Center, modifier = Modifier.width(150.dp))

        // 设置字体类型
        Text(text ="我是Serif字体\n", fontFamily = FontFamily.Serif)

        // 设置斜体
        Text(text ="我是斜体\n", fontStyle = FontStyle.Italic)

        // 用SpanStyle设置文字中包含多种样式
        Text(
            buildAnnotatedString {
                withStyle(style = SpanStyle(color = Color.Blue)) {
                    append("I ")
                }
                append("am a ")

                withStyle(style = SpanStyle(fontWeight = FontWeight.Bold, color = Color.Red)) {
                    append("handsome boy ")
                }
                append("Oh yeah!\n")
            }
        )

        // 用ParagraphStyle设置文字中包含多种样式
        // ParagraphStyle应用于整个段落,
        // 一旦用 ParagraphStyle 标记了一部分文字，
        // 该部分就会与其余部分隔开，就像在开头和末尾有换行符一样。
        Text(
            buildAnnotatedString {
                withStyle(style = ParagraphStyle(lineHeight = 30.sp)) {
                    withStyle(style = SpanStyle(color = Color.Blue)) {
                        append("床前明月光，")
                    }
                    withStyle(
                        style = SpanStyle(
                            fontWeight = FontWeight.Bold,
                            color = Color.Red
                        )
                    ) {
                        append("疑是地上霜。举头望明月，")
                    }
                    append("低头思故乡。")
                }
                append("--静夜思\n")
            }
        )

        // 溢出处理
        Text("放弃了放弃 ".repeat(50), maxLines = 2, overflow = TextOverflow.Ellipsis)
        Text(text = "\n")

        // 选择文本
        SelectionContainer {
            Text("这是可选择的文本")
        }
        Text(text = "\n")
        // 部分不能选择，需要使用DisableSelection包裹
        SelectionContainer {
            Column {
                Text("这是可选择的文本", color = Color.Green)
                Text("这是可选择的文本", color = Color.Green)
                Text("这是可选择的文本", color = Color.Green)
                DisableSelection {
                    Text("这是不可选择的文本", color = Color.Red)
                    Text("这是不可选择的文本", color = Color.Red)
                }
                Text("这是可选择的文本", color = Color.Green)
                Text("这是可选择的文本", color = Color.Green)
            }
        }
        // 文本可点击
        ClickableText(
            text = AnnotatedString("点我啊"),
            onClick = { offset ->
                Log.d("ClickableText", "$offset -th character is clicked.")
            }
        )

        // 部分文本可点击
        val annotatedText = buildAnnotatedString {
            append("请点击 ")

            // 把这里开始到pop()之前的文字标识为url
            pushStringAnnotation(tag = "URL",
                annotation = "https://developer.android.com")
            withStyle(style = SpanStyle(color = Color.Blue,
                fontWeight = FontWeight.Bold)) {
                append("Android Developer")
            }

            pop()
        }

        ClickableText(
            text = annotatedText,
            onClick = { offset ->
                // 有标识为url的文字
                annotatedText.getStringAnnotations(tag = "URL", start = offset,
                    end = offset)
                    .firstOrNull()?.let { annotation ->
                        // If yes, we log its value
                        Log.d("Clicked URL", annotation.item)
                    }
            }
        )
    }
}