Merge remote-tracking branch 'origin/master'

src/qelmt/arc.rs

@@ -1,5 +1,7 @@
 use super::{two_dec, ScaleEntity};
 use dxf::entities;
+use dxf::entities::LwPolyline;
+use hex_color::HexColor;
 use simple_xml_builder::XMLElement;
 
 #[derive(Debug)]
@@ -18,37 +20,71 @@ pub struct Arc {
 
 impl From<&entities::Arc> for Arc {
     fn from(arc: &entities::Arc) -> Self {
-        let temp_angle = if arc.start_angle > arc.end_angle {
+        Self::from_arc_with_color(arc, HexColor::BLACK)
-            (360.0 - arc.start_angle) + arc.end_angle
+    }
+}
+
+impl Arc {
+    /// 从DXF Arc实体创建Arc，支持自定义颜色
+    pub fn from_arc_with_color(arc: &entities::Arc, color: HexColor) -> Self {
+        let is_mirror = arc.normal.z < 0.0;
+
+        let (start_angle, angle_span) = if is_mirror {
+            // 镜像变换：角度关于Y轴对称，即 θ -> 180° - θ
+            // 同时交换起始和结束角度以保持正确的绘制方向
+            let mirrored_start = 180.0 - arc.end_angle;
+            let mirrored_end = 180.0 - arc.start_angle;
+            
+            // 标准化角度到0-360度范围
+            let norm_start = if mirrored_start < 0.0 { 
+                mirrored_start + 360.0 
+            } else { 
+                mirrored_start 
+            };
+            let norm_end = if mirrored_end < 0.0 { 
+                mirrored_end + 360.0 
             } else { 
+                mirrored_end 
+            };
+            
+            // 计算角度跨度
+            let span = if norm_end >= norm_start {
+                norm_end - norm_start
+            } else {
+                (360.0 - norm_start) + norm_end
+            };
+            
+            (norm_start, span)
+        } else {
+            // 正常情况：直接使用原始角度
+            let span = if arc.end_angle >= arc.start_angle {
                 arc.end_angle - arc.start_angle
+            } else {
+                (360.0 - arc.start_angle) + arc.end_angle
+            };
+            (arc.start_angle, span)
         };
 
         Arc {
-            x: arc.center.x - arc.radius,
+            x: if is_mirror {
+                -arc.center.x - arc.radius
+            } else {
+                arc.center.x - arc.radius
+            },
             y: -arc.center.y - arc.radius,
             height: arc.radius * 2.0,
             width: arc.radius * 2.0,
-            start: if arc.start_angle < 0.0 {
+            start: if start_angle < 0.0 { -start_angle } else { start_angle },
-                -arc.start_angle
+            angle: if angle_span < 0.0 { -angle_span } else { angle_span },
-            } else {
-                arc.start_angle
-            },
-            angle: if temp_angle < 0.0 {
-                -temp_angle
-            } else {
-                temp_angle
-            },
 
             //in the original code antialias is always set to false...I'm guessing for performance
             //reasons...I'm trying to think if there is a time we might want to turn it on?
             antialias: false,
             style: if arc.thickness > 0.1 {
-                "line-style:normal;line-weight:normal;filling:none;color:black"
+                format!("line-style:normal;line-weight:normal;filling:none;color:{}", color.display_rgb())
             } else {
-                "line-style:normal;line-weight:thin;filling:none;color:black"
+                format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb())
-            }
+            },
-            .into(),
         }
     }
 }
@@ -68,6 +104,28 @@ impl From<&Arc> for XMLElement {
     }
 }
 
+impl Arc {
+    pub fn new(x: f64, y: f64, width: f64, height: f64, start: f64, angle: f64, style: String) -> Self {
+        Arc {
+            x,
+            y,
+            width,
+            height,
+            start,
+            angle,
+            style,
+            antialias: false,
+        }
+    }
+
+    pub fn update_line_style<F>(&mut self, update_fn: F) 
+    where 
+        F: FnOnce(&mut String),
+    {
+        update_fn(&mut self.style);
+    }
+}
+
 impl ScaleEntity for Arc {
     fn scale(&mut self, fact_x: f64, fact_y: f64) {
         self.x *= fact_x;
@@ -92,3 +150,107 @@ impl ScaleEntity for Arc {
         self.y + self.height
     }
 }
+
+// 在 mod.rs 中添加从 LwPolyline 转换为 Arc 的方法
+impl TryFrom<&LwPolyline> for Arc {
+    type Error = String;
+
+    fn try_from(lwpolyline: &LwPolyline) -> Result<Self, Self::Error> {
+        Self::try_from_lwpolyline_with_color(lwpolyline, HexColor::BLACK)
+    }
+}
+
+impl Arc {
+    /// 从DXF LwPolyline实体创建Arc，支持自定义颜色
+    pub fn try_from_lwpolyline_with_color(lwpolyline: &LwPolyline, color: HexColor) -> Result<Self, String> {
+        // 检查顶点数量，必须是2个顶点才能形成圆弧
+        if lwpolyline.vertices.len() != 2 {
+            return Err(format!("Arc conversion requires exactly 2 vertices, got {}", lwpolyline.vertices.len()));
+        }
+
+        let v1 = &lwpolyline.vertices[0];
+        let v2 = &lwpolyline.vertices[1];
+        
+        // 检查第一个顶点是否有bulge值
+        if v1.bulge == 0.0 {
+            return Err("No bulge value found for arc conversion".to_string());
+        }
+
+        // 计算弦长和中点
+        let chord_length = ((v2.x - v1.x).powi(2) + (v2.y - v1.y).powi(2)).sqrt();
+        let mid_x = (v1.x + v2.x) / 2.0;
+        let mid_y = (v1.y + v2.y) / 2.0;
+        
+        // 根据bulge值计算圆弧参数
+        // bulge = tan(angle/4)，其中angle是圆弧的包含角
+        let bulge = v1.bulge;
+        let included_angle = 4.0 * bulge.atan(); // 圆弧包含角（弧度）
+        
+        // 计算半径
+        let radius = chord_length / (2.0 * (included_angle / 2.0).sin());
+        
+        // 计算圆心位置
+        // 弦的方向向量
+        let chord_dx = v2.x - v1.x;
+        let chord_dy = v2.y - v1.y;
+        
+        // 弦的垂直方向（向左旋转90度）
+        let perp_dx = -chord_dy;
+        let perp_dy = chord_dx;
+        let perp_length = (perp_dx * perp_dx + perp_dy * perp_dy).sqrt();
+        
+        // 标准化垂直向量
+        let unit_perp_x = perp_dx / perp_length;
+        let unit_perp_y = perp_dy / perp_length;
+        
+        // 计算圆心到弦中点的距离
+        let center_distance = radius * (included_angle / 2.0).cos();
+        
+        // 根据bulge的符号确定圆心位置
+        let center_x = if bulge > 0.0 {
+            mid_x + center_distance * unit_perp_x
+        } else {
+            mid_x - center_distance * unit_perp_x
+        };
+        let center_y = if bulge > 0.0 {
+            mid_y + center_distance * unit_perp_y
+        } else {
+            mid_y - center_distance * unit_perp_y
+        };
+        
+        // 计算起始角度和结束角度
+        let start_angle = (v1.y - center_y).atan2(v1.x - center_x);
+        let end_angle = (v2.y - center_y).atan2(v2.x - center_x);
+        
+        // 将弧度转换为度数
+        let mut start_angle_deg = start_angle.to_degrees();
+        let mut end_angle_deg = end_angle.to_degrees();
+        
+        // 标准化角度到0-360度范围
+        if start_angle_deg < 0.0 {
+            start_angle_deg += 360.0;
+        }
+        if end_angle_deg < 0.0 {
+            end_angle_deg += 360.0;
+        }
+        
+        // 计算角度跨度
+        let arc_angle = included_angle.to_degrees().abs();
+        
+        // 创建Arc对象
+        Ok(Arc {
+            x: center_x - radius, // 边界框左上角x坐标
+            y: -center_y - radius, // 边界框左上角y坐标（y轴翻转）
+            width: radius * 2.0,  // 边界框宽度
+            height: radius * 2.0, // 边界框高度
+            start: start_angle_deg, // 起始角度（度）
+            angle: arc_angle,     // 圆弧角度跨度（度）
+            style: if lwpolyline.thickness > 0.1 {
+                format!("line-style:normal;line-weight:normal;filling:none;color:{}", color.display_rgb())
+            } else {
+                format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb())
+            },
+            antialias: false,
+        })
+    }
+}

src/qelmt/dynamictext.rs

@@ -4,6 +4,8 @@ use hex_color::HexColor;
 use simple_xml_builder::XMLElement;
 use unicode_segmentation::UnicodeSegmentation;
 use uuid::Uuid;
+use dxf::enums::AttachmentPoint;
+use dxf::enums::{HorizontalTextJustification, VerticalTextJustification};
 
 /*use parley::{
     Alignment, FontContext, FontWeight, InlineBox, Layout, LayoutContext, PositionedLayoutItem,
@@ -59,7 +61,26 @@ impl From<&DynamicText> for XMLElement {
         // o.k. ... as long as we do not know the real width:
         // "guess" the width by number of characters and font-size:
         //
-        let graphene_count = txt.text.graphemes(true).count();
+        // let graphene_count = txt.text.graphemes(true).count();
+        let mut cjk_char_count = 0;
+        let mut graphene_count = 0;
+        for grapheme in txt.text.graphemes(true) {
+            graphene_count += 1;
+            if grapheme.chars().any(|c| {
+                // 检查是否为中文字符（包括中日韩统一表意文字）
+                (c >= '\u{4E00}' && c <= '\u{9FFF}') ||  // CJK统一表意文字
+                (c >= '\u{3400}' && c <= '\u{4DBF}') ||  // CJK扩展A
+                (c >= '\u{20000}' && c <= '\u{2A6DF}') || // CJK扩展B
+                (c >= '\u{2A700}' && c <= '\u{2B73F}') || // CJK扩展C
+                (c >= '\u{2B740}' && c <= '\u{2B81F}') || // CJK扩展D
+                (c >= '\u{2B820}' && c <= '\u{2CEAF}') || // CJK扩展E
+                (c >= '\u{F900}' && c <= '\u{FAFF}') ||   // CJK兼容表意文字
+                (c >= '\u{2F800}' && c <= '\u{2FA1F}')    // CJK兼容表意文字补充
+            }) {
+                cjk_char_count += 1;
+            }
+        }
+
         let txt_width = if txt.reference_rectangle_width > 2.0 {
             txt.reference_rectangle_width
         } else {
@@ -85,15 +106,44 @@ impl From<&DynamicText> for XMLElement {
         //     }
         // };
 
+        // 如果采用计算对齐的方式，可能还要考虑字体宽度的偏差。。
+
+        println!("文本:{}", txt.text);
+        println!("对齐方式：{}, {}", txt.h_alignment, txt.v_alignment);
+        println!("文本宽度: {}", txt_width);
+        println!("文本高度：{}", pt_size);
+        println!("初始位置: x={}, y={}", txt.x, txt.y);
+        println!("旋转角度: {}", txt.rotation);
+        println!("cjk_char_count: {}", cjk_char_count);
+
         // 计算基础位置（不考虑旋转）
-        let base_x = txt.x + 0.5 - (pt_size / 8.0) - 4.05;
+        // txt.x和txt.y现在是对齐点坐标，需要根据对齐方式计算出左上角位置
-        let base_y = {
+        // 首先根据水平对齐方式计算左边界的x坐标
-            let base_y_pos = txt.y + 0.5 - (7.0 / 5.0 * pt_size + 26.0 / 5.0) + pt_size;
+        let left_x = match txt.h_alignment {
-            match txt.v_alignment {
+            HAlignment::Left => txt.x,
-                VAlignment::Top => base_y_pos,
+            HAlignment::Center => txt.x - txt_width / 2.0,
-                VAlignment::Center => base_y_pos - pt_size / 2.0,
+            HAlignment::Right => txt.x - txt_width,
-                VAlignment::Bottom => base_y_pos - pt_size,
+        };
-            }
+        
+        // 根据垂直对齐方式计算顶部的y坐标
+        let top_y = txt.y;
+
+        // 根据是否包含中文字符调整字体大小相关的偏移量
+        let cjk_offset:f64 = (cjk_char_count as f64) * pt_size * 0.75;
+
+        // 左对齐是不需要中文偏移的，居中对齐需要偏移，右对齐要偏移
+        let base_x = left_x + 0.5 - (pt_size / 8.0) - 4.05
+        - match txt.h_alignment {
+            HAlignment::Left => 0.0,
+            HAlignment::Center => cjk_offset / 2.0,
+            HAlignment::Right => cjk_offset,
+        };
+
+        let base_y = top_y + 0.5 - (7.0 / 5.0 * pt_size + 26.0 / 5.0)
+        + match txt.v_alignment {
+            VAlignment::Top => pt_size / 2.0,
+            VAlignment::Center => pt_size,
+            VAlignment::Bottom => pt_size / 2.0,
         };
 
         // 如果有旋转角度，应用旋转变换
@@ -102,7 +152,7 @@ impl From<&DynamicText> for XMLElement {
             let cos_r = rotation_rad.cos();
             let sin_r = rotation_rad.sin();
             
-            // 以文本原点为中心进行旋转变换
+            // 以对齐点为中心进行旋转变换
             let dx = base_x - txt.x;
             let dy = base_y - txt.y;
             
@@ -114,6 +164,9 @@ impl From<&DynamicText> for XMLElement {
             (base_x, base_y)
         };
 
+        println!("最终位置: x={}, y={}", x_pos, y_pos);
+
+
         dtxt_xml.add_attribute("x", two_dec(x_pos));
         dtxt_xml.add_attribute("y", two_dec(y_pos));
         dtxt_xml.add_attribute("z", two_dec(txt.z));
@@ -136,6 +189,12 @@ impl From<&DynamicText> for XMLElement {
         text_xml.add_text(&txt.text);
         dtxt_xml.add_child(text_xml);
 
+        // 添加颜色
+        let mut color_xml = XMLElement::new("color");
+        color_xml.add_text(&txt.color.display_rgb());
+        dtxt_xml.add_child(color_xml);
+
+
         if let Some(i_name) = &txt.info_name {
             dtxt_xml.add_attribute("info_name", i_name);
         }
@@ -222,9 +281,15 @@ impl<'a> DTextBuilder<'a> {
             v_alignment,
             reference_rectangle_width,
         ) = match self.text {
-            TextEntity::Text(txt) => (
+            TextEntity::Text(txt) => {
-                txt.location.x,
+                let (x, y) = if txt.horizontal_text_justification == HorizontalTextJustification::Left && (txt.vertical_text_justification == VerticalTextJustification::Bottom || txt.vertical_text_justification == VerticalTextJustification::Baseline) {
-                -txt.location.y,
+                    (txt.location.x, -txt.location.y)
+                } else {
+                    (txt.second_alignment_point.x, -txt.second_alignment_point.y)
+                };
+                (
+                    x,
+                    y,
                     txt.location.z,
                     txt.rotation,
                     &txt.text_style_name,
@@ -233,12 +298,15 @@ impl<'a> DTextBuilder<'a> {
                     HAlignment::from(txt.horizontal_text_justification),
                     VAlignment::from(txt.vertical_text_justification),
                     0.0, // as Placeholder: no "reference_rectangle_width" with Text!!!
-            ),
+            )},
-            TextEntity::MText(mtxt) => (
+            TextEntity::MText(mtxt) => {
+                // 计算实际的旋转角度，优先使用x_axis_direction向量
+                let actual_rotation = calculate_mtext_rotation(mtxt.rotation_angle, &mtxt.x_axis_direction);
+                (
                 mtxt.insertion_point.x,
                 -mtxt.insertion_point.y,
                 mtxt.insertion_point.z,
-                mtxt.rotation_angle,
+                actual_rotation,
                 &mtxt.text_style_name,
                 //I'm not sure what the proper value is here for Mtext
                 //becuase I haven't actually finished supporting it.
@@ -262,15 +330,25 @@ impl<'a> DTextBuilder<'a> {
                 {
                     let mut val = mtxt.extended_text.join("");
                     val.push_str(&mtxt.text);
-                    val.replace("\\P", "\n")
+                    let processed_val = val.replace("\\P", "\n");
+                    super::extract_text_from_pcl(&processed_val)
                 },
                 HAlignment::from(mtxt.attachment_point),
                 VAlignment::from(mtxt.attachment_point),
                 mtxt.reference_rectangle_width,
-            ),
+            )},
-            TextEntity::Attrib(attrib) => (
+            TextEntity::Attrib(attrib) => {
-                attrib.location.x,
+                // 根据DXF文本对齐规则，当水平对齐不是Left时，使用second_alignment_point
-                -attrib.location.y,
+                let (x, y) = if attrib.horizontal_text_justification == HorizontalTextJustification::Left && (attrib.vertical_text_justification == VerticalTextJustification::Bottom || attrib.vertical_text_justification == VerticalTextJustification::Baseline) {
+                    println!("{}",111);
+                    (attrib.location.x, -attrib.location.y)
+                } else {
+                    println!("{}",222);
+                    (attrib.second_alignment_point.x, -attrib.second_alignment_point.y)
+                };
+                (
+                    x,
+                    y,
                     attrib.location.z,
                     attrib.rotation,
                     &attrib.text_style_name,
@@ -279,7 +357,8 @@ impl<'a> DTextBuilder<'a> {
                     HAlignment::from(attrib.horizontal_text_justification),
                     VAlignment::from(attrib.vertical_text_justification),
                     0.0, // as Placeholder: not need to check if Attrib has something similar
-            ),
+                )
+            },
         };
 
         // Create a FontContext (font database) and LayoutContext (scratch space).
@@ -351,3 +430,86 @@ impl<'a> DTextBuilder<'a> {
         }
     }
 }
+
+
+/// 计算MText的实际旋转角度
+///
+/// # Arguments
+/// * `rotation_angle` - DXF中的rotation_angle字段（编号50）
+/// * `x_axis_direction` - DXF中的x_axis_direction向量（编号11,21,31）
+///
+/// # Returns
+/// 返回实际的旋转角度（弧度）
+fn calculate_mtext_rotation(rotation_angle: f64, x_axis_direction: &dxf::Vector) -> f64 {
+    // 检查x_axis_direction是否为默认值(1.0, 0.0, 0.0)
+    let default_x_axis = (x_axis_direction.x - 1.0).abs() < 1e-10 
+        && x_axis_direction.y.abs() < 1e-10 
+        && x_axis_direction.z.abs() < 1e-10;
+    
+    if default_x_axis {
+        // 如果x_axis_direction是默认值，使用rotation_angle
+        rotation_angle
+    } else {
+        // 如果x_axis_direction不是默认值，从向量计算角度
+        // atan2返回弧度值，需要转换为度数
+        let angle_radians = x_axis_direction.y.atan2(x_axis_direction.x);
+        // 将弧度转换为度数，这里rotation字段期望度数
+        angle_radians * 180.0 / std::f64::consts::PI
+    }
+}
+
+/// 将MText的对齐点坐标调整为左下角坐标
+/// 
+/// # 参数
+/// * `x` - MText的insertion_point.x（对齐点X坐标）
+/// * `y` - MText的insertion_point.y（对齐点Y坐标）
+/// * `attachment_point` - MText的对齐方式
+/// * `text_height` - 文本高度
+/// * `text_width` - 文本宽度（reference_rectangle_width）
+/// 
+/// # 返回值
+/// 返回调整后的(x, y)坐标，对应文本的左下角位置
+pub fn adjust_mtext_coordinates(
+    x: f64,
+    y: f64,
+    attachment_point: AttachmentPoint,
+    text_height: f64,
+    text_width: f64,
+) -> (f64, f64) {
+    let mut adjusted_x = x;
+    let mut adjusted_y = y;
+    
+    // 根据水平对齐方式调整X坐标
+    match attachment_point {
+        // 左对齐：无需调整X坐标
+        AttachmentPoint::TopLeft | AttachmentPoint::MiddleLeft | AttachmentPoint::BottomLeft => {
+            // X坐标已经是左边界，无需调整
+        }
+        // 中心对齐：向左偏移文本宽度的一半
+        AttachmentPoint::TopCenter | AttachmentPoint::MiddleCenter | AttachmentPoint::BottomCenter => {
+            adjusted_x -= text_width / 2.0; // 如果文本旋转了，那就不是这么算了
+        }
+        // 右对齐：向左偏移整个文本宽度
+        AttachmentPoint::TopRight | AttachmentPoint::MiddleRight | AttachmentPoint::BottomRight => {
+            adjusted_x -= text_width;
+        }
+    }
+    
+    // 根据垂直对齐方式调整Y坐标
+    match attachment_point {
+        // 底部对齐：无需调整Y坐标（已经是底边界）
+        AttachmentPoint::BottomLeft | AttachmentPoint::BottomCenter | AttachmentPoint::BottomRight => {
+            // Y坐标已经是底边界，无需调整
+        }
+        // 中心对齐：向下偏移文本高度的一半
+        AttachmentPoint::MiddleLeft | AttachmentPoint::MiddleCenter | AttachmentPoint::MiddleRight => {
+            adjusted_y -= text_height / 2.0;
+        }
+        // 顶部对齐：向下偏移整个文本高度
+        AttachmentPoint::TopLeft | AttachmentPoint::TopCenter | AttachmentPoint::TopRight => {
+            adjusted_y -= text_height;
+        }
+    }
+    
+    (adjusted_x, adjusted_y)
+}

src/qelmt/ellipse.rs

@@ -1,5 +1,6 @@
 use super::{two_dec, Circularity, ScaleEntity};
 use dxf::entities::{self, Circle, LwPolyline, Polyline};
+use hex_color::HexColor;
 use simple_xml_builder::XMLElement;
 
 #[derive(Debug)]
@@ -7,6 +8,7 @@ pub struct Ellipse {
     height: f64,
     width: f64,
     style: String,
+    color: HexColor,
 
     //need to brush up on my Rust scoping rules, isn't there a way to make this pub to just the module?
     pub x: f64,
@@ -22,6 +24,7 @@ impl From<&Circle> for Ellipse {
             y: -circ.center.y - circ.radius,
             height: circ.radius * 2.0,
             width: circ.radius * 2.0,
+            color: HexColor::BLACK,
 
             //in the original code antialias is always set to false...I'm guessing for performance
             //reasons...I'm trying to think if there is a time we might want to turn it on?
@@ -41,8 +44,9 @@ impl From<&entities::Ellipse> for Ellipse {
         Ellipse {
             x: ellipse.center.x - ellipse.major_axis.x,
             y: -ellipse.center.y - ellipse.major_axis.x * ellipse.minor_axis_ratio,
-            height: ellipse.major_axis.x * 2.0,
+            width: ellipse.major_axis.x * 2.0,
-            width: ellipse.major_axis.x * 2.0 * ellipse.minor_axis_ratio,
+            height: ellipse.major_axis.x * 2.0 * ellipse.minor_axis_ratio,
+            color: HexColor::BLACK,
 
             //in the original code antialias is always set to false...I'm guessing for performance
             //reasons...I'm trying to think if there is a time we might want to turn it on?
@@ -87,6 +91,7 @@ impl TryFrom<&Polyline> for Ellipse {
             y: -max_y,
             height: max_y - y,
             width: max_x - x,
+            color: HexColor::BLACK,
 
             //in the original code antialias is always set to false...I'm guessing for performance
             //reasons...I'm trying to think if there is a time we might want to turn it on?
@@ -100,7 +105,15 @@ impl TryFrom<&LwPolyline> for Ellipse {
     type Error = &'static str; //add better error later
 
     fn try_from(poly: &LwPolyline) -> Result<Self, Self::Error> {
-        if !poly.is_circular() {
+        Self::try_from_lwpolyline_with_color(poly, HexColor::BLACK)
+    }
+}
+
+impl Ellipse {
+    pub fn try_from_lwpolyline_with_color(poly: &LwPolyline, color: HexColor) -> Result<Self, &'static str> {
+        let is_bugle_circle = poly.is_circular_with_bulge();
+
+        if !is_bugle_circle&&!poly.is_circular() {
             return Err("Polyline has poor circularity, can't convert");
         }
 
@@ -124,16 +137,23 @@ impl TryFrom<&LwPolyline> for Ellipse {
             .iter()
             .fold(f64::MIN, |max_y, vtx| max_y.max(vtx.y));
 
+        let style = format!("line-style:normal;line-weight:thin;filling:none;color:rgb({},{},{})", color.r, color.g, color.b);
+
         Ok(Ellipse {
             x,
-            y: -max_y,
+            y: if is_bugle_circle {-max_y-(max_x - x)/2.0} else {-max_y},
-            height: max_y - y,
+            height: if is_bugle_circle {
+                max_x - x
+            } else {
+                max_y - y
+            },
             width: max_x - x,
+            color,
 
             //in the original code antialias is always set to false...I'm guessing for performance
             //reasons...I'm trying to think if there is a time we might want to turn it on?
             antialias: false,
-            style: "line-style:normal;line-weight:thin;filling:none;color:black".into(),
+            style,
         })
     }
 }
@@ -147,10 +167,32 @@ impl From<&Ellipse> for XMLElement {
         ell_xml.add_attribute("height", two_dec(ell.height));
         ell_xml.add_attribute("antialias", ell.antialias);
         ell_xml.add_attribute("style", &ell.style);
+        ell_xml.add_attribute("color", ell.color.display_rgb().to_string());
         ell_xml
     }
 }
 
+impl Ellipse {
+    pub fn set_style(&mut self, style: String) {
+        self.style = style;
+    }
+    
+    pub fn update_line_style<F>(&mut self, update_fn: F) 
+    where 
+        F: FnOnce(&mut String),
+    {
+        update_fn(&mut self.style);
+    }
+
+    pub fn set_color(&mut self, color: HexColor) {
+        self.color = color;
+    }
+
+    pub fn get_color(&self) -> HexColor {
+        self.color
+    }
+}
+
 impl ScaleEntity for Ellipse {
     fn scale(&mut self, fact_x: f64, fact_y: f64) {
         self.x *= fact_x;

src/qelmt/line.rs

@@ -2,6 +2,7 @@ use super::two_dec;
 use super::LineEnd;
 use super::ScaleEntity;
 use dxf::entities::{self, LwPolyline, Polyline};
+use hex_color::HexColor;
 use simple_xml_builder::XMLElement;
 
 #[derive(Debug)]
@@ -25,26 +26,7 @@ pub struct Leader(pub Vec<Line>);
 
 impl From<&entities::Line> for Line {
     fn from(line: &entities::Line) -> Self {
-        Line {
+        Self::from_line_with_color(line, HexColor::BLACK)
-            x1: line.p1.x,
-            y1: -line.p1.y,
-            length1: 1.5, //why is this statically set at 1.5?
-            end1: LineEnd::None,
-            x2: line.p2.x,
-            y2: -line.p2.y,
-            length2: 1.5, //why is this statically set at 1.5?
-            end2: LineEnd::None,
-
-            //in the original code antialias is always set to false...I'm guessing for performance
-            //reasons...I'm trying to think if there is a time we might want to turn it on?
-            antialias: false,
-            style: if line.thickness > 0.5 {
-                "line-style:normal;line-weight:normal;filling:none;color:black"
-            } else {
-                "line-style:normal;line-weight:thin;filling:none;color:black"
-            }
-            .into(),
-        }
     }
 }
 
@@ -83,6 +65,13 @@ impl TryFrom<&LwPolyline> for Line {
     type Error = &'static str; //add better error later
 
     fn try_from(poly: &LwPolyline) -> Result<Self, Self::Error> {
+        Self::try_from_lwpolyline_with_color(poly, HexColor::BLACK)
+    }
+}
+
+impl Line {
+    /// 从DXF LwPolyline实体创建Line，支持自定义颜色
+    pub fn try_from_lwpolyline_with_color(poly: &LwPolyline, color: HexColor) -> Result<Self, &'static str> {
         if poly.vertices.len() != 2 {
             return Err("Error can't convert polyline with more than 2 points into a Line");
         }
@@ -101,11 +90,12 @@ impl TryFrom<&LwPolyline> for Line {
             //reasons...I'm trying to think if there is a time we might want to turn it on?
             antialias: false,
             style: if poly.thickness > 0.1 {
-                "line-style:normal;line-weight:normal;filling:none;color:black"
+                format!("line-style:normal;line-weight:normal;filling:none;color:{}", color.display_rgb())
+            } else if poly.constant_width > 1.0{
+                format!("line-style:normal;line-weight:hight;filling:none;color:{}", color.display_rgb())
             } else {
-                "line-style:normal;line-weight:thin;filling:none;color:black"
+                format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb())
-            }
+            },
-            .into(),
         })
     }
 }
@@ -171,6 +161,53 @@ impl From<&Line> for XMLElement {
     }
 }
 
+impl Line {
+    /// 从DXF Line实体创建Line，支持自定义颜色
+    pub fn from_line_with_color(line: &entities::Line, color: HexColor) -> Self {
+        Line {
+            x1: line.p1.x,
+            y1: -line.p1.y,
+            length1: 1.5, //why is this statically set at 1.5?
+            end1: LineEnd::None,
+            x2: line.p2.x,
+            y2: -line.p2.y,
+            length2: 1.5, //why is this statically set at 1.5?
+            end2: LineEnd::None,
+
+            //in the original code antialias is always set to false...I'm guessing for performance
+            //reasons...I'm trying to think if there is a time we might want to turn it on?
+            antialias: false,
+            style: if line.thickness > 0.5 {
+                format!("line-style:normal;line-weight:normal;filling:none;color:{}", color.display_rgb())
+            } else {
+                format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb())
+            },
+        }
+    }
+
+    pub fn new(x1: f64, y1: f64, x2: f64, y2: f64, style: String) -> Self {
+        Line {
+            length2: 1.5,
+            end2: LineEnd::None,
+            length1: 1.5,
+            x1,
+            y1,
+            x2,
+            y2,
+            style,
+            end1: LineEnd::None,
+            antialias: false,
+        }
+    }
+
+    pub fn update_line_style<F>(&mut self, update_fn: F) 
+    where 
+        F: FnOnce(&mut String),
+    {
+        update_fn(&mut self.style);
+    }
+}
+
 impl ScaleEntity for Line {
     fn scale(&mut self, fact_x: f64, fact_y: f64) {
         self.x1 *= fact_x;

src/qelmt/mod.rs

@@ -100,6 +100,9 @@ trait Circularity {
         //for a specific type
         0.98..=1.02
     }
+
+    // 考虑bugle圆形判断
+    fn is_circular_with_bulge(&self) -> bool;
 }
 
 // 为 Polyline 类型实现圆形检测，有点类似函数定义
@@ -137,6 +140,10 @@ impl Circularity for Polyline {
 
         Self::match_range().contains(&t_ratio)
     }
+
+    fn is_circular_with_bulge(&self) -> bool{
+        false
+    }
 }
 
 // 为 LwPolyline 类型实现相同的圆形检测逻辑
@@ -165,22 +172,45 @@ impl Circularity for LwPolyline {
             poly_area /= 2.0;
             poly_area.abs()
         };
-        let t_ratio = 4.0 * PI * poly_area / poly_perim.powf(2.0);
         
+        let t_ratio = 4.0 * PI * poly_area / poly_perim.powf(2.0);
         Self::match_range().contains(&t_ratio)
     }
+
+    fn is_circular_with_bulge(&self) -> bool {
+        // 检查是否有显著的bulge值
+        let has_bulge = self.vertices.iter().any(|v| v.bulge.abs() > 0.5);
+        if !has_bulge {
+            return false;
+        }
+
+        let all_quarter_arcs = self.vertices.iter()
+            .all(|v| (v.bulge.abs() - 1.0).abs() < 0.05);
+        
+        if all_quarter_arcs {
+            // 检查是否闭合
+            if self.vertices.len() >= 3 {
+                let first = &self.vertices[0];
+                let last = &self.vertices[self.vertices.len() - 1];
+                let distance = ((last.x - first.x).powf(2.0) + (last.y - first.y).powf(2.0)).sqrt();
+                return distance < 0.1; // 起点终点接近
+            }
+        }
+        false
+    }
 }
 
 // 实现Definition的方法
+// 最后返回文本的definition标签了
 impl Definition {
-    // 创建新的 Definition 实例
+    // 创建新的 Definition 实例，对应elmt的<definition>标签 传入参数：文件名, 步长, dxf图纸
     pub fn new(name: impl Into<String>, spline_step: u32, drw: &Drawing) -> Self {
         /*for st in drw.styles() {
             dbg!(st);
         }*/
-        // 缩放处理
+        // 根据制图系统的类型缩放处理
         let scale_factor = Self::scale_factor(drw.header.default_drawing_units);
-        // 创建description
+        // 创建description，对应elmt的<description>标签，里面就是实际的画图元素标签
         let description = {
             let mut description: Description = (drw, spline_step).into();
             description.scale(scale_factor, scale_factor);
@@ -530,7 +560,7 @@ pub struct ObjectsBuilder<'a> {
     spline_step: u32,
     blocks: &'a [&'a Block],
     offset: Offset,
-    scale_fact: ScaleFactor,
+    scale_fact: ScaleFactor
 }
 
 impl<'a> ObjectsBuilder<'a> {
@@ -576,19 +606,54 @@ impl<'a> ObjectsBuilder<'a> {
             return Err("Entity is not visible");
         }
 
+        // 获取线型名称
+        let line_type_name: String = self.ent.common.line_type_name.clone();
+
+        // 通用样式修改函数：根据line_type_name修改现有style中的line-style
+        let update_line_style = |style: &mut String| {
+            // 只有当line_type_name需要虚线样式时才进行修改，提高性能
+            if line_type_name.contains("DASH") || line_type_name == "BORDURE" {
+                // 使用正则表达式替换line-style部分
+                if style.contains("line-style:") {
+                    *style = style.replace(
+                        &format!("line-style:{}", 
+                            if style.contains("line-style:normal") { "normal" } 
+                            else if style.contains("line-style:dashed") { "dashed" }
+                            else { "normal" }
+                        ),
+                        "line-style:dashed"
+                    );
+                }
+            }
+            // 如果不是特殊线型，保持原有样式不变，避免不必要的操作
+        };
+        
         // 实体类型转换处理
         match &self.ent.specific {
             // Circle → Ellipse ：圆转换为椭圆
             EntityType::Circle(circle) => {
                 let mut ellipse: Ellipse = circle.into();
 
+                // 根据line_type_name更新线型样式
+                ellipse.update_line_style(&update_line_style);
+
                 ellipse.scale(self.scale_fact.x, self.scale_fact.y);
                 ellipse.x += self.offset.x;
                 ellipse.y -= self.offset.y;
                 Ok(Objects::Ellipse(ellipse))
             }
             EntityType::Line(line) => {
-                let mut line: Line = line.into();
+                // 获取颜色
+                let color = if let Some(aci_index) = self.ent.common.color.index() {
+                    aci_to_hex_color(aci_index)
+                } else {
+                    HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                };
+                
+                let mut line: Line = Line::from_line_with_color(line, color);
+
+                // 根据line_type_name更新线型样式
+                line.update_line_style(&update_line_style);
 
                 line.scale(self.scale_fact.x, self.scale_fact.y);
 
@@ -598,10 +663,23 @@ impl<'a> ObjectsBuilder<'a> {
                 line.x2 += self.offset.x;
                 line.y2 -= self.offset.y;
 
+                println!("Line: x1: {}, y1: {}, x2: {}, y2: {}", line.x1, line.y1, line.x2, line.y2);
+
+
                 Ok(Objects::Line(line))
             }
             EntityType::Arc(arc) => {
-                let mut arc: Arc = arc.into();
+                // 获取颜色
+                let color = if let Some(aci_index) = self.ent.common.color.index() {
+                    aci_to_hex_color(aci_index)
+                } else {
+                    HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                };
+                
+                let mut arc: Arc = Arc::from_arc_with_color(arc, color);
+
+                // 根据line_type_name更新线型样式
+                arc.update_line_style(&update_line_style);
 
                 arc.scale(self.scale_fact.x, self.scale_fact.y);
 
@@ -613,6 +691,9 @@ impl<'a> ObjectsBuilder<'a> {
             EntityType::Spline(spline) => {
                 let mut poly: Polygon = (spline, self.spline_step).into();
 
+                // 根据line_type_name更新线型样式
+                poly.update_line_style(&update_line_style);
+
                 match poly.coordinates.len() {
                     0 | 1 => Err("Error removing empty Spline"),
                     //I'll need to improve my understanding of splines and the math here
@@ -641,7 +722,13 @@ impl<'a> ObjectsBuilder<'a> {
                         //how best to pass in the flag for dynamic text or not....should the flag also default to true?
                         let mut text: Text = (
                             text,
-                            HexColor::from_u32(self.ent.common.color_24_bit as u32),
+                            {
+                                if let Some(aci_index) = self.ent.common.color.index() {
+                                    aci_to_hex_color(aci_index)
+                                } else {
+                                    HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                                }
+                            },
                         )
                             .into();
 
@@ -653,7 +740,15 @@ impl<'a> ObjectsBuilder<'a> {
                         Objects::Text(text)
                     } else {
                         let mut dtext = DTextBuilder::from_text(text)
-                            .color(HexColor::from_u32(self.ent.common.color_24_bit as u32))
+                            .color({
+                                // 优先使用 ACI 颜色索引
+                                if let Some(aci_index) = self.ent.common.color.index() {
+                                    aci_to_hex_color(aci_index)
+                                } else {
+                                    // 回退到24位颜色
+                                    HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                                }
+                            })
                             .build();
 
                         dtext.scale(self.scale_fact.x, self.scale_fact.y);
@@ -668,6 +763,9 @@ impl<'a> ObjectsBuilder<'a> {
             EntityType::Ellipse(ellipse) => {
                 let mut ellipse: Ellipse = ellipse.into();
 
+                // 根据line_type_name更新线型样式
+                ellipse.update_line_style(&update_line_style);
+
                 ellipse.scale(self.scale_fact.x, self.scale_fact.y);
                 ellipse.x += self.offset.x;
                 ellipse.y -= self.offset.y;
@@ -709,6 +807,9 @@ impl<'a> ObjectsBuilder<'a> {
                 2 => {
                     let mut line = Line::try_from(polyline)?;
 
+                    // 根据line_type_name更新线型样式
+                    line.update_line_style(&update_line_style);
+
                     line.scale(self.scale_fact.x, self.scale_fact.x);
 
                     line.x1 += self.offset.x;
@@ -721,6 +822,9 @@ impl<'a> ObjectsBuilder<'a> {
                 }
                 _ => {
                     if let Ok(mut ellipse) = Ellipse::try_from(polyline) {
+                        // 根据line_type_name更新线型样式
+                        ellipse.update_line_style(&update_line_style);
+
                         ellipse.scale(self.scale_fact.x, self.scale_fact.y);
 
                         ellipse.x += self.offset.x;
@@ -730,6 +834,9 @@ impl<'a> ObjectsBuilder<'a> {
                     } else {
                         let mut poly: Polygon = polyline.into();
 
+                        // 根据line_type_name更新线型样式
+                        poly.update_line_style(&update_line_style);
+
                         poly.scale(self.scale_fact.x, self.scale_fact.y);
 
                         for cord in &mut poly.coordinates {
@@ -741,10 +848,36 @@ impl<'a> ObjectsBuilder<'a> {
                     }
                 }
             },
-            EntityType::LwPolyline(lwpolyline) => match lwpolyline.vertices.len() {
+            EntityType::LwPolyline(lwpolyline) => {
+                // 获取颜色
+                let color = if let Some(aci_index) = self.ent.common.color.index() {
+                    aci_to_hex_color(aci_index)
+                } else {
+                    HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                };
+                
+                match lwpolyline.vertices.len() {
                     0 | 1 => Err("Error empty LwPolyline"),
                     2 => {
-                    let mut line = Line::try_from(lwpolyline)?;
+                        if lwpolyline.vertices[0].bulge != 0.0 {
+                            match Arc::try_from_lwpolyline_with_color(lwpolyline, color) {
+                                Ok(mut arc) => {
+                                    arc.update_line_style(&update_line_style);
+                                    arc.scale(self.scale_fact.x, self.scale_fact.y);
+                                    arc.x += self.offset.x;
+                                    arc.y -= self.offset.y;
+                                    return Ok(Objects::Arc(arc));
+                                }
+                                Err(_) => {
+                                    // Arc转换失败，继续执行下面的Line转换
+                                }
+                            }
+                        }
+
+                        let mut line = Line::try_from_lwpolyline_with_color(lwpolyline, color)?;
+
+                        // 根据line_type_name更新线型样式
+                        line.update_line_style(&update_line_style);
 
                         line.scale(self.scale_fact.x, self.scale_fact.y);
 
@@ -757,15 +890,44 @@ impl<'a> ObjectsBuilder<'a> {
                         Ok(Objects::Line(line))
                     }
                     _ => {
-                    if let Ok(mut ellipse) = Ellipse::try_from(lwpolyline) {
+                        if let Ok(mut ellipse) = Ellipse::try_from_lwpolyline_with_color(lwpolyline, color) {
+                            // 根据line_type_name更新线型样式
+                            ellipse.update_line_style(&update_line_style);
+
                             ellipse.scale(self.scale_fact.x, self.scale_fact.y);
 
                             ellipse.x += self.offset.x;
                             ellipse.y -= self.offset.y;
 
                             Ok(Objects::Ellipse(ellipse))
+                        } else if polygon::is_rounded_rectangle(lwpolyline) {
+                            // 拆分圆角四边形为圆弧和直线段
+                            let mut decomposed_objects = polygon::decompose_rounded_rectangle_with_color(lwpolyline, color);
+
+                            // 对每个对象应用缩放和偏移
+                            for obj in &mut decomposed_objects {
+                                obj.scale(self.scale_fact.x, self.scale_fact.y);
+                                match obj {
+                                    Objects::Arc(ref mut arc) => {
+                                        arc.x += self.offset.x;
+                                        arc.y -= self.offset.y;
+                                    }
+                                    Objects::Line(ref mut line) => {
+                                        line.x1 += self.offset.x;
+                                        line.y1 -= self.offset.y;
+                                        line.x2 += self.offset.x;
+                                        line.y2 -= self.offset.y;
+                                    }
+                                    _ => {}
+                                }
+                            }
+                            
+                            Ok(Objects::Group(decomposed_objects))
                         } else {
-                        let mut poly: Polygon = lwpolyline.into();
+                                let mut poly: Polygon = Polygon::from_lwpolyline_with_color(lwpolyline, color);
+
+                                // 根据line_type_name更新线型样式
+                                poly.update_line_style(&update_line_style);
 
                                 poly.scale(self.scale_fact.x, self.scale_fact.y);
 
@@ -777,6 +939,7 @@ impl<'a> ObjectsBuilder<'a> {
                                 Ok(Objects::Polygon(poly))
                         }
                     }
+                }
             },
             EntityType::Solid(solid) => {
                 let mut poly: Polygon = solid.into();
@@ -849,7 +1012,15 @@ impl<'a> ObjectsBuilder<'a> {
             EntityType::AttributeDefinition(attrib) => Ok({
                 //need to look up the proper way to get the color for the Attrib
                 let mut dtext = DTextBuilder::from_attrib(attrib)
-                    .color(HexColor::from_u32(self.ent.common.color_24_bit as u32))
+                    .color({
+                        // 优先使用 ACI 颜色索引
+                        if let Some(aci_index) = self.ent.common.color.index() {
+                            aci_to_hex_color(aci_index)
+                        } else {
+                            // 回退到24位颜色
+                            HexColor::from_u32(self.ent.common.color_24_bit as u32)
+                        }
+                    })
                     .build();
 
                 dtext.scale(self.scale_fact.x, self.scale_fact.y);
@@ -1205,6 +1376,7 @@ impl From<HorizontalTextJustification> for HAlignment {
         match value {
             HorizontalTextJustification::Left => HAlignment::Left,
             HorizontalTextJustification::Center => HAlignment::Center,
+            HorizontalTextJustification::Middle => HAlignment::Center,
             HorizontalTextJustification::Right => HAlignment::Right,
 
             //TODO: Handling the Aligned Middle and Fit alignments are a bit more complicated
@@ -1539,3 +1711,153 @@ enum TextEntity<'a> {
     MText(&'a dxf::entities::MText),
     Attrib(&'a AttributeDefinition),
 }
+
+// AutoCAD Color Index (ACI) 到 RGB 转换函数
+fn aci_to_rgb(aci: u8) -> (u8, u8, u8) {
+    match aci {
+        1 => (255, 0, 0),     // 红色
+        2 => (255, 255, 0),   // 黄色
+        3 => (0, 255, 0),     // 绿色
+        4 => (0, 255, 255),   // 青色
+        5 => (0, 0, 255),     // 蓝色
+        6 => (255, 0, 255),   // 洋红色
+        // 7 => (255, 255, 255), // 白色
+        8 => (128, 128, 128), // 深灰色
+        9 => (192, 192, 192), // 浅灰色
+        94 => (0, 129, 0),    // 深绿色
+        15 => (129, 86, 86),   // 深棕色
+
+        // 更多标准颜色可以根据需要添加
+        _ => (0, 0, 0), // 默认黑色
+    }
+}
+
+// ACI 转换为 HexColor
+fn aci_to_hex_color(aci: u8) -> HexColor {
+    let (r, g, b) = aci_to_rgb(aci);
+    HexColor::rgb(r, g, b)
+}
+
+/// 从PCL格式字符串中提取文本内容
+/// 
+/// 解析Printer Command Language (PCL)格式的字符串，提取其中的文本内容。
+/// 支持格式如："\pxt1;{\T1.001;传感器S1}" -> "传感器S1"
+/// 以及Unicode转义格式："{\T1.00100;\U+4F20\U+611F\U+5668S2}" -> "传感器S2"
+/// 
+/// # 参数
+/// * `pcl_string` - PCL格式的字符串
+/// 
+/// # 返回值
+/// 提取出的文本内容，如果解析失败则返回原字符串
+pub fn extract_text_from_pcl(pcl_string: &str) -> String {
+    // 移除开头和结尾的空白字符
+    let trimmed = pcl_string.trim();
+    
+    // 处理直接以大括号开始的格式：{\T1.00100;\U+4F20\U+611F\U+5668S2}
+    if trimmed.starts_with('{') && trimmed.ends_with('}') {
+        let content = &trimmed[1..trimmed.len() - 1];
+        
+        // 查找\T命令
+        if let Some(t_pos) = content.find("\\T") {
+            // 查找\T命令后的分号
+            let t_content = &content[t_pos..];
+            if let Some(t_semicolon_pos) = t_content.find(';') {
+                let text_content = &t_content[t_semicolon_pos + 1..];
+                return decode_unicode_escapes(text_content);
+            }
+        }
+        
+        // 如果没有找到\T命令，返回大括号内的全部内容并解码Unicode
+        return decode_unicode_escapes(content);
+    }
+    
+    // 检查是否以\pxt开头
+    if !trimmed.starts_with("\\pxt") {
+        return pcl_string.to_string();
+    }
+    
+    // 查找第一个分号，这标志着\pxt命令的结束
+    if let Some(semicolon_pos) = trimmed.find(';') {
+        let remaining = &trimmed[semicolon_pos + 1..];
+        
+        // 检查是否有大括号包围的内容
+        if remaining.starts_with('{') && remaining.ends_with('}') {
+            let content = &remaining[1..remaining.len() - 1];
+            
+            // 查找\T命令
+            if let Some(t_pos) = content.find("\\T") {
+                // 查找\T命令后的分号
+                let t_content = &content[t_pos..];
+                if let Some(t_semicolon_pos) = t_content.find(';') {
+                    let text_content = &t_content[t_semicolon_pos + 1..];
+                    return decode_unicode_escapes(text_content);
+                }
+            }
+            
+            // 如果没有找到\T命令，返回大括号内的全部内容并解码Unicode
+            return decode_unicode_escapes(content);
+        }
+    }
+    
+    // 如果解析失败，返回原字符串
+    pcl_string.to_string()
+}
+
+/// 解码Unicode转义序列，如\U+4F20转换为对应的Unicode字符
+/// 
+/// # 参数
+/// * `text` - 包含Unicode转义序列的文本
+/// 
+/// # 返回值
+/// 解码后的文本
+fn decode_unicode_escapes(text: &str) -> String {
+    let mut result = String::new();
+    let mut chars = text.chars().peekable();
+    
+    while let Some(ch) = chars.next() {
+        if ch == '\\' {
+            // 检查是否是Unicode转义序列 \U+XXXX
+            if chars.peek() == Some(&'U') {
+                chars.next(); // 消费 'U'
+                if chars.peek() == Some(&'+') {
+                    chars.next(); // 消费 '+'
+                    
+                    // 收集十六进制数字
+                    let mut hex_digits = String::new();
+                    while let Some(&next_ch) = chars.peek() {
+                        if next_ch.is_ascii_hexdigit() {
+                            hex_digits.push(chars.next().unwrap());
+                        } else {
+                            break;
+                        }
+                    }
+                    
+                    // 尝试解析十六进制数字为Unicode码点
+                    if let Ok(code_point) = u32::from_str_radix(&hex_digits, 16) {
+                        if let Some(unicode_char) = char::from_u32(code_point) {
+                            result.push(unicode_char);
+                            continue;
+                        }
+                    }
+                    
+                    // 如果解析失败，保留原始字符
+                    result.push('\\');
+                    result.push('U');
+                    result.push('+');
+                    result.push_str(&hex_digits);
+                } else {
+                    // 不是 \U+ 格式，保留原始字符
+                    result.push('\\');
+                    result.push('U');
+                }
+            } else {
+                // 不是Unicode转义，保留反斜杠
+                result.push('\\');
+            }
+        } else {
+            result.push(ch);
+        }
+    }
+    
+    result
+}

src/qelmt/polygon.rs

@@ -1,5 +1,6 @@
 use super::{two_dec, ScaleEntity};
 use dxf::entities::{LwPolyline, Polyline, Solid, Spline};
+use hex_color::HexColor;
 use simple_xml_builder::XMLElement;
 use std::ops::{Add, Mul};
 
@@ -79,6 +80,13 @@ impl From<&Polyline> for Polygon {
 
 impl From<&LwPolyline> for Polygon {
     fn from(poly: &LwPolyline) -> Self {
+        Self::from_lwpolyline_with_color(poly, HexColor::BLACK)
+    }
+}
+
+impl Polygon {
+    /// 从DXF LwPolyline实体创建Polygon，支持自定义颜色
+    pub fn from_lwpolyline_with_color(poly: &LwPolyline, color: HexColor) -> Self {
         Polygon {
             coordinates: poly
                 .vertices
@@ -93,11 +101,10 @@ impl From<&LwPolyline> for Polygon {
             //reasons...I'm trying to think if there is a time we might want to turn it on?
             antialias: false,
             style: if poly.thickness > 0.1 {
-                "line-style:normal;line-weight:normal;filling:none;color:black"
+                format!("line-style:normal;line-weight:normal;filling:none;color:{}", color.display_rgb())
             } else {
-                "line-style:normal;line-weight:thin;filling:none;color:black"
+                format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb())
-            }
+            },
-            .into(),
         }
     }
 }
@@ -185,9 +192,9 @@ impl From<&Solid> for Polygon {
             //reasons...I'm trying to think if there is a time we might want to turn it on?
             antialias: false,
             style: if solid.thickness > 0.5 {
-                "line-style:normal;line-weight:normal;filling:none;color:black"
+                "line-style:normal;line-weight:normal;filling:black;color:black"
             } else {
-                "line-style:normal;line-weight:thin;filling:none;color:black"
+                "line-style:normal;line-weight:thin;filling:black;color:black"
             }
             .into(),
         }
@@ -214,6 +221,15 @@ impl From<&Polygon> for XMLElement {
     }
 }
 
+impl Polygon {
+    pub fn update_line_style<F>(&mut self, update_fn: F) 
+    where 
+        F: FnOnce(&mut String),
+    {
+        update_fn(&mut self.style);
+    }
+}
+
 impl ScaleEntity for Polygon {
     fn scale(&mut self, fact_x: f64, fact_y: f64) {
         self.coordinates.iter_mut().for_each(|coord| {
@@ -280,3 +296,176 @@ impl ScaleEntity for Polygon {
         }
     }
 }
+
+
+/// 判断LwPolyline是否为带圆角的四边形
+/// 条件：恰好8个顶点，闭合，每个顶点的bulge值要么为0（直线段）要么非0（圆弧段）
+pub fn is_rounded_rectangle(lwpolyline: &LwPolyline) -> bool {
+    // 检查顶点数量
+    if lwpolyline.vertices.len() != 8 {
+        return false;
+    }
+    
+    // 检查每个顶点的bulge值，确保形成合理的圆角四边形
+    // 圆角四边形应该有交替的直线段和圆弧段，或者4个圆角
+    let bulge_count = lwpolyline.vertices.iter()
+        .filter(|v| v.bulge.abs() > 0.0)
+        .count();
+    
+    // 4个圆角
+    bulge_count == 4
+}
+
+/// 将带圆角的四边形拆分为圆弧和直线段
+pub fn decompose_rounded_rectangle(lwpolyline: &LwPolyline) -> Vec<super::Objects> {
+    decompose_rounded_rectangle_with_color(lwpolyline, HexColor::BLACK)
+}
+
+pub fn decompose_rounded_rectangle_with_color(lwpolyline: &LwPolyline, color: HexColor) -> Vec<super::Objects> {
+    let mut objects = Vec::new();
+    let vertices = &lwpolyline.vertices;
+    
+    for i in 0..vertices.len() {
+        let current = &vertices[i];
+        let next = &vertices[(i + 1) % vertices.len()];
+        
+        if current.bulge.abs() > 1e-10 {
+            // 创建圆弧段
+            if let Some(arc) = create_arc_from_bulge_with_color(current.x, current.y, next.x, next.y, current.bulge, color) {
+                objects.push(super::Objects::Arc(arc));
+            }
+        } else {
+            // 创建直线段
+            let style = if lwpolyline.thickness > 0.5 {
+                format!("line-style:normal;line-weight:normal;filling:none;color:color:{}", color.display_rgb())
+            } else {
+                format!("line-style:normal;line-weight:thin;filling:none;color:color:{}", color.display_rgb())
+            };
+            
+            let line = super::Line::new(
+                current.x,
+                -current.y,  // Y轴翻转
+                next.x,
+                -next.y,     // Y轴翻转
+                style,
+            );
+            objects.push(super::Objects::Line(line));
+        }
+    }
+    objects
+}
+
+/// 根据bulge值创建圆弧
+fn create_arc_from_bulge(start_x: f64, start_y: f64, end_x: f64, end_y: f64, bulge: f64) -> Option<super::Arc> {
+    create_arc_from_bulge_with_color(start_x, start_y, end_x, end_y, bulge, HexColor::BLACK)
+}
+
+fn create_arc_from_bulge_with_color(start_x: f64, start_y: f64, end_x: f64, end_y: f64, bulge: f64, color: HexColor) -> Option<super::Arc> {
+    if bulge.abs() <= 1e-10 {
+        return None;
+    }
+
+    // 计算弦长和中点
+    let chord_length = ((end_x - start_x).powi(2) + (end_y - start_y).powi(2)).sqrt();
+    let mid_x = (start_x + end_x) / 2.0;
+    let mid_y = (start_y + end_y) / 2.0;
+
+    // 根据bulge值计算圆弧参数
+    // bulge = tan(angle/4)，其中angle是圆弧的包含角
+    let included_angle = 4.0 * bulge.atan(); // 圆弧包含角（弧度）
+
+    // 计算半径
+    let radius: f64 = chord_length / (2.0 * (included_angle / 2.0).sin());
+
+    // 计算圆心位置
+    // 弦的方向向量
+    let chord_dx = end_x - start_x;
+    let chord_dy = end_y - start_y;
+    
+    // 弦的垂直方向（向左旋转90度）
+    let perp_dx = -chord_dy;
+    let perp_dy = chord_dx;
+    let perp_length: f64 = (perp_dx * perp_dx + perp_dy * perp_dy).sqrt();
+    
+    // 标准化垂直向量
+    let unit_perp_x = perp_dx / perp_length;
+    let unit_perp_y = perp_dy / perp_length;
+
+    // 计算圆心到中点的距离
+    let center_distance: f64 = radius * (included_angle / 2.0).cos();
+    
+    // 根据bulge的符号确定圆心位置
+    let center_x = if bulge > 0.0 {
+        mid_x + center_distance * unit_perp_x
+    } else {
+        mid_x - center_distance * unit_perp_x
+    };
+    let center_y = if bulge > 0.0 {
+        mid_y + center_distance * unit_perp_y
+    } else {
+        mid_y - center_distance * unit_perp_y
+    };
+
+    // 计算起始角度和结束角度
+    let start_angle = (start_y - center_y).atan2(start_x - center_x);
+    let end_angle = (end_y - center_y).atan2(end_x - center_x);
+
+    // 将弧度转换为度数
+    let mut start_angle_deg: f64 = start_angle.to_degrees();
+    let mut end_angle_deg: f64 = end_angle.to_degrees();
+        
+    // 标准化角度到0-360度范围
+    if start_angle_deg < 0.0 {
+        start_angle_deg += 360.0;
+    }
+    if end_angle_deg < 0.0 {
+        end_angle_deg += 360.0;
+    }
+        
+    // 计算角度跨度
+    let arc_angle: f64 = included_angle.to_degrees().abs();
+    
+    // // 计算圆弧参数
+    // let start_x = start_vertex.x;
+    // let start_y = -start_vertex.y;  // Y轴翻转
+    // let end_x = end_vertex.x;
+    // let end_y = -end_vertex.y;      // Y轴翻转
+    
+    // // 弦长
+    // let chord_length = ((end_x - start_x).powi(2) + (end_y - start_y).powi(2)).sqrt();
+    // if chord_length < 1e-10 {
+    //     return None;
+    // }
+    
+    // // 根据bulge计算圆弧的角度
+    // let angle = 4.0 * bulge.atan();
+    // // 计算圆弧的半径
+    // let radius = chord_length / (2.0 * (angle / 2.0).sin());
+    
+    // // 计算中点
+    // let mid_x = (start_x + end_x) / 2.0;
+    // let mid_y = (start_y + end_y) / 2.0;
+    
+    // // 计算弦角
+    // let chord_angle = (end_y - start_y).atan2(end_x - start_x);
+    // let center_offset = radius * (angle / 2.0).cos();
+    
+    // let center_x = mid_x - center_offset * (chord_angle + std::f64::consts::PI / 2.0).sin();
+    // let center_y = mid_y + center_offset * (chord_angle + std::f64::consts::PI / 2.0).cos();
+    
+    // // 计算起始角度和角度跨度
+    // let start_angle = (start_y - center_y).atan2(start_x - center_x).to_degrees();
+    // let angle_span = angle.to_degrees().abs();
+
+    let style = format!("line-style:normal;line-weight:thin;filling:none;color:{}", color.display_rgb());
+    
+    Some(super::Arc::new(
+        center_x-radius,
+        -center_y-radius,
+        radius.abs() * 2.0,
+        radius.abs() * 2.0,
+        start_angle_deg,
+        arc_angle,
+        style,
+    ))
+}