watchdiff_tui/diff/
generator.rs

1use super::algorithms::{DiffAlgorithm, DiffAlgorithmType, DiffResult};
2
3/// High-level diff generator that can use different algorithms
4pub struct DiffGenerator {
5    algorithm: Box<dyn DiffAlgorithm>,
6}
7
8impl DiffGenerator {
9    /// Create a new diff generator with the specified algorithm
10    pub fn new(algorithm_type: DiffAlgorithmType) -> Self {
11        Self {
12            algorithm: algorithm_type.create(),
13        }
14    }
15    
16    /// Create a diff generator with a custom algorithm
17    pub fn with_algorithm(algorithm: Box<dyn DiffAlgorithm>) -> Self {
18        Self { algorithm }
19    }
20    
21    /// Generate a diff between old and new content
22    pub fn generate(&self, old: &str, new: &str) -> DiffResult {
23        self.algorithm.diff(old, new)
24    }
25    
26    /// Get the current algorithm name
27    pub fn algorithm_name(&self) -> &str {
28        self.algorithm.name()
29    }
30    
31    /// Get the current algorithm description
32    pub fn algorithm_description(&self) -> &str {
33        self.algorithm.description()
34    }
35}
36
37impl Default for DiffGenerator {
38    fn default() -> Self {
39        Self::new(DiffAlgorithmType::default())
40    }
41}
42
43/// Builder for configuring diff generation
44pub struct DiffConfig {
45    algorithm: DiffAlgorithmType,
46    context_lines: usize,
47}
48
49impl DiffConfig {
50    pub fn new() -> Self {
51        Self {
52            algorithm: DiffAlgorithmType::default(),
53            context_lines: 3,
54        }
55    }
56    
57    pub fn algorithm(mut self, algorithm: DiffAlgorithmType) -> Self {
58        self.algorithm = algorithm;
59        self
60    }
61    
62    pub fn context_lines(mut self, lines: usize) -> Self {
63        self.context_lines = lines;
64        self
65    }
66    
67    pub fn build(self) -> DiffGenerator {
68        DiffGenerator::new(self.algorithm)
69    }
70}
71
72impl Default for DiffConfig {
73    fn default() -> Self {
74        Self::new()
75    }
76}
77
78#[cfg(test)]
79mod tests {
80    use super::*;
81
82    #[test]
83    fn test_diff_generator() {
84        let generator = DiffGenerator::new(DiffAlgorithmType::Myers);
85        let result = generator.generate("a\nb\nc", "a\nx\nc");
86        
87        assert_eq!(generator.algorithm_name(), "Myers");
88        assert_eq!(result.stats.lines_added, 1);
89        assert_eq!(result.stats.lines_removed, 1);
90    }
91    
92    #[test]
93    fn test_diff_config_builder() {
94        let generator = DiffConfig::new()
95            .algorithm(DiffAlgorithmType::Patience)
96            .context_lines(5)
97            .build();
98            
99        assert_eq!(generator.algorithm_name(), "Patience");
100    }
101}
watchdiff_tui/diff/generator.rs

watchdiff_tui/diff/
generator.rs
