asterism 0.5.5

Hyperbolic navigation for tree data
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123

//! Section representation for tree-sitter parsed documents.
//!
//! A section represents a hierarchical division of a document, typically
//! corresponding to a heading in markdown. Sections track their position
//! in the document tree through parent/child relationships and maintain
//! precise byte and line coordinates for content extraction and modification.

#[derive(Clone)]
/// Hierarchical document division with precise coordinates for extraction and modification.
pub struct Section {
    /// Section heading text without markup symbols.
    pub title: String,
    /// Nesting depth in the document hierarchy (1 for top-level).
    pub level: usize,
    /// First line of section content (after the heading).
    pub line_start: i64,
    /// Line where the next section begins or file ends.
    pub line_end: i64,
    /// Starting column of the section heading.
    pub column_start: i64,
    /// Ending column of the section heading.
    pub column_end: i64,
    /// Byte offset where section content begins.
    pub byte_start: usize,
    /// Byte offset where section content ends.
    pub byte_end: usize,
    /// Source file containing this section.
    pub file_path: String,
    /// Index of the containing section in the hierarchy.
    pub parent_index: Option<usize>,
    /// Indices of directly nested subsections.
    pub children_indices: Vec<usize>,
    /// Edited content for this section (if modified)
    pub section_content: Option<Vec<String>>,
    /// The chunk type (for diffs)
    pub chunk_type: Option<ChunkType>,
    /// The LHS (for diffs)
    pub lhs_content: Option<String>,
    /// The RHS (for diffs)
    pub rhs_content: Option<String>,
}

#[derive(Clone)]
/// What sort of hunk (syntactic diff atomic unit) it is.
pub enum ChunkType {
    /// Only RHS exists
    Added,
    /// Only LHS exists
    Deleted,
    /// Both LHS and RHS exist (and differ)
    Modified,
    /// Both LHS and RHS exist (and are the same, at least syntactically)
    Unchanged,
}

#[derive(Clone)]
/// Types of nodes that can appear in the file tree view.
pub enum NodeType {
    /// Directory node showing a path component
    Directory {
        /// Directory name (not full path)
        name: String,
        /// Full path for reference
        path: String,
    },
    /// File node (non-navigable, just shows filename)
    File {
        /// File name
        name: String,
        /// Full path for reference
        path: String,
    },
    /// Actual document section (navigable)
    Section(Section),
}

#[derive(Clone)]
/// A node in the unified file + section tree.
pub struct TreeNode {
    /// The type of node (directory, file, or section)
    pub node_type: NodeType,
    /// Nesting level in the tree (for indentation/box-drawing)
    pub tree_level: usize,
    /// Whether this node can be selected and edited
    pub navigable: bool,
    /// Index of the actual section if this is a Section node
    pub section_index: Option<usize>,
}

impl TreeNode {
    /// Create a directory node
    #[must_use]
    pub fn directory(name: String, path: String, tree_level: usize) -> Self {
        Self {
            node_type: NodeType::Directory { name, path },
            tree_level,
            navigable: false,
            section_index: None,
        }
    }

    /// Create a file node
    #[must_use]
    pub fn file(name: String, path: String, tree_level: usize) -> Self {
        Self {
            node_type: NodeType::File { name, path },
            tree_level,
            navigable: false,
            section_index: None,
        }
    }

    /// Create a section node
    #[must_use]
    pub fn section(section: Section, tree_level: usize, section_index: usize) -> Self {
        Self {
            node_type: NodeType::Section(section),
            tree_level,
            navigable: true,
            section_index: Some(section_index),
        }
    }
}