From 1461f38cccba7a0918c84c79c5ad2befb7dd54fd Mon Sep 17 00:00:00 2001
From: Jiang-Red <1343396474@qq.com>
Date: Wed, 11 Jan 2023 23:06:11 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 title.go | 12 +++++++++---
 utils.go | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/title.go b/title.go
index a2c7cc7..c35c145 100644
--- a/title.go
+++ b/title.go
@@ -92,7 +92,7 @@ func (t *Title) DrawTitleWithText(info []string) (imgs image.Image, err error) {
 
 	// 加载size为108的字体
 	fontsize1, fontsize2 := 108.0, 54.0
-	err = canvas.LoadFontFace(t.TextFont, fontsize1)
+	err = canvas.LoadFontFace(t.TitleFont, fontsize1)
 	if err != nil {
 		return
 	}
@@ -104,7 +104,7 @@ func (t *Title) DrawTitleWithText(info []string) (imgs image.Image, err error) {
 	canvas.DrawStringAnchored(t.LeftTitle, 25+stringwight/2+t.OffsetX, 25+fontsize1*72/96*0.5+t.OffsetY, 0.5, 0.5)
 
 	// 加载size为54的字体
-	err = canvas.LoadFontFace(t.TitleFont, fontsize2)
+	err = canvas.LoadFontFace(t.TextFont, fontsize2)
 	if err != nil {
 		return
 	}
@@ -123,13 +123,19 @@ func (t *Title) DrawTitleWithText(info []string) (imgs image.Image, err error) {
 	canvas.Fill()
 	canvas.SetRGBA255(15, 15, 15, 255)
 
+	// 加载size为54的字体
+	err = canvas.LoadFontFace(t.TitleFont, fontsize2)
+	if err != nil {
+		return
+	}
+
 	stringwight, _ = canvas.MeasureString(t.RightTitle)
 	canvas.DrawStringAnchored(t.RightTitle, DefaultWidth-40-stringwight/2+t.OffsetX, 40+fontsize2*72/96*0.5+t.OffsetY, 0.5, 0.5)
 	stringwight, _ = canvas.MeasureString(t.RightSubtitle)
 	canvas.DrawStringAnchored(t.RightSubtitle, DefaultWidth-40-stringwight/2+t.OffsetX, 40+25+fontsize2*72/96*1.5+t.OffsetY, 0.5, 0.5)
 
 	// 加载size为38的字体
-	err = canvas.LoadFontFace(t.TitleFont, 38)
+	err = canvas.LoadFontFace(t.TextFont, 38)
 	if err != nil {
 		return
 	}
diff --git a/utils.go b/utils.go
index 29db211..4efb0ff 100644
--- a/utils.go
+++ b/utils.go
@@ -3,6 +3,7 @@ package rendercard
 import (
 	"image"
 	"image/color"
+	"strings"
 
 	"github.com/Coloured-glaze/gg"
 )
@@ -40,3 +41,41 @@ func Transparency(dst image.Image, magnification float64) image.Image {
 	}
 	return dstr
 }
+
+// Truncate 截断文字
+func Truncate(fontfile string, texts []string, maxW, fontsize float64) ([]string, error) {
+	one := gg.NewContext(1, 1)
+	err := one.LoadFontFace(fontfile, fontsize)
+	if err != nil {
+		return nil, err
+	}
+	newtexts := make([]string, 0, len(texts)*2)
+	for i := 0; i < len(texts); i++ {
+		newlinetext, textw, tmpw := "", 0.0, 0.0
+		text := texts[i]
+		for len(texts[i]) > 0 {
+			var tmp strings.Builder
+			tmp.Grow(len(text))
+			res := make([]rune, 0, len(text))
+			for _, r := range text {
+				tmp.WriteRune(r)
+				width, _ := one.MeasureString(tmp.String()) // 获取文字宽度
+				if width > maxW {                           // 如果宽度大于文字边距
+					break // 跳出
+				} else {
+					res = append(res, r) // 写入
+				}
+				newlinetext = string(res)
+			}
+			newtexts = append(newtexts, newlinetext)
+			if tmpw > textw {
+				textw = tmpw
+			}
+			if len(newlinetext) >= len(texts[i]) {
+				break
+			}
+			texts[i] = texts[i][len(newlinetext):]
+		}
+	}
+	return newtexts, nil
+}