Read styles (#37)

* feat: style reader

* feat: Add styles reader

* fix: lint

docx-core/src/documents/mod.rs

@@ -79,10 +79,29 @@ impl Docx {
     }
 
     pub fn document(mut self, d: Document) -> Docx {
+        for child in &self.document.children {
+            match child {
+                DocumentChild::Paragraph(paragraph) => {
+                    if paragraph.has_numbering {
+                        self.document_rels.has_numberings = true;
+                    }
+                }
+                DocumentChild::Table(table) => {
+                    if table.has_numbering {
+                        self.document_rels.has_numberings = true;
+                    }
+                }
+            }
+        }
         self.document = d;
         self
     }
 
+    pub fn styles(mut self, s: Styles) -> Self {
+        self.styles = s;
+        self
+    }
+
     pub fn add_paragraph(mut self, p: Paragraph) -> Docx {
         if p.has_numbering {
             // If this document has numbering, set numberings.xml to document_rels.

docx-core/src/reader/document.rs

@@ -10,7 +10,6 @@ impl FromXML for Document {
     fn from_xml<R: Read>(reader: R) -> Result<Self, ReaderError> {
         let mut parser = EventReader::new(reader);
         let mut doc = Self::default();
-
         loop {
             let e = parser.next();
             match e {

docx-core/src/reader/document_rels.rs

@@ -0,0 +1,92 @@
+use std::collections::HashMap;
+use std::io::{Cursor, Read};
+use std::path::*;
+use std::str::FromStr;
+
+use xml::reader::{EventReader, XmlEvent};
+
+use super::errors::*;
+use super::*;
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct ReadDocumentRels {
+    rels: HashMap<String, PathBuf>,
+}
+
+impl ReadDocumentRels {
+    pub fn find_target_path(&self, target: &str) -> Option<PathBuf> {
+        self.rels.get(target).cloned()
+    }
+}
+
+pub fn read_document_rels(
+    archive: &mut zip::read::ZipArchive<Cursor<&[u8]>>,
+    main_path: impl AsRef<Path>,
+) -> Result<ReadDocumentRels, ReaderError> {
+    let dir = &main_path
+        .as_ref()
+        .parent()
+        .ok_or(ReaderError::DocumentRelsNotFoundError)?;
+    let p = find_rels_filename(&main_path)?;
+    let p = p.to_str().ok_or(ReaderError::DocumentRelsNotFoundError)?;
+    let rels_xml = archive.by_name(&p)?;
+    let rels = read_rels_xml(rels_xml, dir)?;
+    Ok(rels)
+}
+
+fn read_rels_xml<R: Read>(
+    reader: R,
+    dir: impl AsRef<Path>,
+) -> Result<ReadDocumentRels, ReaderError> {
+    let mut parser = EventReader::new(reader);
+    let mut rels = ReadDocumentRels {
+        rels: HashMap::new(),
+    };
+    loop {
+        let e = parser.next();
+        match e {
+            Ok(XmlEvent::StartElement {
+                attributes, name, ..
+            }) => {
+                let e = XMLElement::from_str(&name.local_name).unwrap();
+                if let XMLElement::Relationship = e {
+                    let mut rel_type = "".to_owned();
+                    let mut target = PathBuf::default();
+                    for a in attributes {
+                        let local_name = &a.name.local_name;
+                        if local_name == "Type" {
+                            rel_type = a.value.to_owned();
+                        } else if local_name == "Target" {
+                            target = Path::new(dir.as_ref()).join(a.value);
+                        }
+                    }
+                    rels.rels.insert(rel_type, target);
+                    continue;
+                }
+            }
+            Ok(XmlEvent::EndElement { name, .. }) => {
+                let e = XMLElement::from_str(&name.local_name).unwrap();
+                if let XMLElement::Relationships = e {
+                    break;
+                }
+            }
+            Err(_) => return Err(ReaderError::XMLReadError),
+            _ => {}
+        }
+    }
+    Ok(rels)
+}
+
+fn find_rels_filename(main_path: impl AsRef<Path>) -> Result<PathBuf, ReaderError> {
+    let path = main_path.as_ref();
+    let dir = path
+        .parent()
+        .ok_or(ReaderError::DocumentRelsNotFoundError)?;
+    let base = path
+        .file_stem()
+        .ok_or(ReaderError::DocumentRelsNotFoundError)?;
+    Ok(Path::new(dir)
+        .join("_rels")
+        .join(base)
+        .with_extension("xml.rels"))
+}

docx-core/src/reader/errors.rs

@@ -12,6 +12,10 @@ pub enum ReaderError {
     XMLReadError,
     #[error("Failed to find document.")]
     DocumentNotFoundError,
+    #[error("Failed to find document rels.")]
+    DocumentRelsNotFoundError,
+    #[error("Failed to find styles.")]
+    DocumentStylesNotFoundError,
     #[error("Unknown error")]
     Unknown,
 }

docx-core/src/reader/mod.rs

@@ -1,6 +1,7 @@
 mod attributes;
 mod delete;
 mod document;
+mod document_rels;
 mod errors;
 mod from_xml;
 mod insert;
@@ -21,12 +22,15 @@ use zip;
 use crate::documents::*;
 
 pub use attributes::*;
+pub use document_rels::*;
 pub use errors::ReaderError;
 pub use from_xml::*;
 pub use xml_element::*;
 
 const DOC_RELATIONSHIP_TYPE: &str =
     "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";
+const STYLE_RELATIONSHIP_TYPE: &str =
+    "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles";
 
 pub fn read_docx(buf: &[u8]) -> Result<Docx, ReaderError> {
     let cur = Cursor::new(buf);
@@ -46,6 +50,15 @@ pub fn read_docx(buf: &[u8]) -> Result<Docx, ReaderError> {
         .ok_or(ReaderError::DocumentNotFoundError)?;
     let document_xml = archive.by_name(&main_rel.2)?;
     let document = Document::from_xml(document_xml)?;
-    let docx = Docx::new().document(document);
+
+    // Read document relationships
+    let rels = read_document_rels(&mut archive, &main_rel.2)?;
+    let style_path = rels
+        .find_target_path(STYLE_RELATIONSHIP_TYPE)
+        .ok_or(ReaderError::DocumentStylesNotFoundError)?;
+    let styles_xml = archive.by_name(style_path.to_str().expect("should have styles"))?;
+    let styles = Styles::from_xml(styles_xml)?;
+
+    let docx = Docx::new().document(document).styles(styles);
     Ok(docx)
 }

docx-core/src/reader/styles.rs

@@ -37,28 +37,39 @@ impl FromXML for Styles {
     }
 }
 
-// #[cfg(test)]
-// mod tests {
-//
-//     use super::*;
-//     #[cfg(test)]
-//     use pretty_assertions::assert_eq;
-//
-//     #[test]
-//     fn test_from_xml() {
-//         let xml = r#"<?xml version="1.0" encoding="UTF-8"?>
-// <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
-//   <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties" Target="docProps/core.xml" />
-// </Relationships>"#;
-//         let c = Rels::from_xml(xml.as_bytes()).unwrap();
-//         let mut rels = Vec::new();
-//         rels.push((
-//             "http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties"
-//                 .to_owned(),
-//             "rId1".to_owned(),
-//             "docProps/core.xml".to_owned(),
-//         ));
-//         assert_eq!(Rels { rels }, c);
-//     }
-// }
-//
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+    use crate::types::*;
+    #[cfg(test)]
+    use pretty_assertions::assert_eq;
+
+    #[test]
+    fn test_from_xml() {
+        let xml =
+            r#"<w:styles xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
+    <w:style w:type="character" w:styleId="FootnoteTextChar">
+        <w:name w:val="Footnote Text Char"></w:name>
+        <w:rPr>
+            <w:sz w:val="20"></w:sz>
+            <w:szCs w:val="20"></w:szCs>
+        </w:rPr>
+        <w:uiPriority w:val="99"></w:uiPriority>
+        <w:unhideWhenUsed></w:unhideWhenUsed>
+        <w:basedOn w:val="DefaultParagraphFont"></w:basedOn>
+        <w:link w:val="FootnoteText"></w:link>
+        <w:uiPriority w:val="99"></w:uiPriority>
+        <w:semiHidden></w:semiHidden>
+    </w:style>
+</w:styles>"#;
+        let s = Styles::from_xml(xml.as_bytes()).unwrap();
+        let mut styles = Styles::new();
+        styles = styles.add_style(
+            Style::new("FootnoteTextChar", StyleType::Character)
+                .name("Footnote Text Char")
+                .size(20),
+        );
+        assert_eq!(s, styles);
+    }
+}

docx-core/src/reader/xml_element.rs

@@ -65,6 +65,8 @@ pub enum XMLElement {
     VertAlign,
     Spacing,
     Styles,
+    Relationship,
+    Relationships,
     Unsupported,
 }
 
@@ -129,6 +131,8 @@ impl FromStr for XMLElement {
             "vertAlign" => Ok(XMLElement::VertAlign),
             "spacing" => Ok(XMLElement::Spacing),
             "styles" => Ok(XMLElement::Styles),
+            "Relationships" => Ok(XMLElement::Relationships),
+            "Relationship" => Ok(XMLElement::Relationship),
             _ => Ok(XMLElement::Unsupported),
         }
     }

docx-core/src/types/style_type.rs

@@ -11,6 +11,8 @@ use std::str::FromStr;
 pub enum StyleType {
     Paragraph,
     Character,
+    Numbering,
+    Unsupported,
 }
 
 impl fmt::Display for StyleType {
@@ -18,6 +20,8 @@ impl fmt::Display for StyleType {
         match *self {
             StyleType::Paragraph => write!(f, "paragraph"),
             StyleType::Character => write!(f, "character"),
+            StyleType::Numbering => write!(f, "numbering"),
+            StyleType::Unsupported => write!(f, "unsupported"),
         }
     }
 }
@@ -28,7 +32,8 @@ impl FromStr for StyleType {
         match s {
             "paragraph" => Ok(StyleType::Paragraph),
             "character" => Ok(StyleType::Character),
-            _ => Err(errors::TypeError::FromStrError),
+            "numbering" => Ok(StyleType::Numbering),
+            _ => Ok(StyleType::Unsupported),
         }
     }
 }