feat: parse PPTX connector shapes (cxnSp)

crates/office2pdf/src/ir/elements.rs

@@ -446,9 +446,20 @@ pub struct Shape {
 pub enum ShapeKind {
     Rectangle,
     Ellipse,
+    /// Straight line from `(x1,y1)` to `(x2,y2)` in points, relative to element's top-left.
     Line {
+        x1: f64,
+        y1: f64,
         x2: f64,
         y2: f64,
+        head_end: ArrowHead,
+        tail_end: ArrowHead,
+    },
+    /// Multi-segment polyline in points, relative to element's top-left.
+    Polyline {
+        points: Vec<(f64, f64)>,
+        head_end: ArrowHead,
+        tail_end: ArrowHead,
     },
     /// Rectangle with rounded corners. `radius_fraction` is relative to `min(width, height)`.
     RoundedRectangle {
@@ -460,6 +471,14 @@ pub enum ShapeKind {
     },
 }
 
+/// Arrowhead decoration on a line endpoint.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+pub enum ArrowHead {
+    #[default]
+    None,
+    Triangle,
+}
+
 #[cfg(test)]
 #[path = "elements_tests.rs"]
 mod tests;

crates/office2pdf/src/parser/pptx.rs

@@ -11,8 +11,8 @@ use zip::ZipArchive;
 use crate::config::ConvertOptions;
 use crate::error::{ConvertError, ConvertWarning};
 use crate::ir::{
-    Alignment, Block, BorderLineStyle, BorderSide, CellBorder, CellVerticalAlign, Chart, Color,
-    Document, FixedElement, FixedElementKind, FixedPage, GradientFill, ImageCrop, ImageData,
+    Alignment, ArrowHead, Block, BorderLineStyle, BorderSide, CellBorder, CellVerticalAlign, Chart,
+    Color, Document, FixedElement, FixedElementKind, FixedPage, GradientFill, ImageCrop, ImageData,
     ImageFormat, Insets, LineSpacing, List, ListItem, ListKind, ListLevelStyle, Page, PageSize,
     Paragraph, ParagraphStyle, Run, Shadow, Shape, ShapeKind, SmartArt, SmartArtNode, StyleSheet,
     Table, TableCell, TableRow, TextBoxData, TextBoxVerticalAlign, TextDirection, TextStyle,
@@ -25,7 +25,8 @@ use self::package::{load_theme, parse_presentation_xml, parse_rels_xml, read_zip
 #[cfg(test)]
 use self::package::{resolve_relative_path, scan_chart_refs};
 use self::shapes::{
-    parse_group_shape, parse_src_rect, pptx_dash_to_border_style, prst_to_shape_kind,
+    parse_arrow_head, parse_group_shape, parse_src_rect, pptx_dash_to_border_style,
+    prst_to_shape_kind,
 };
 use self::slides::{parse_single_slide, parse_slide_xml};
 use self::tables::{parse_pptx_table, scale_pptx_table_geometry_to_frame};