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| 1 | +mod diff_algo; |
| 2 | +mod diff_viewer; |
| 3 | + |
| 4 | +use similar::{capture_diff_slices, Algorithm, DiffOp, TextDiff}; |
| 5 | +use web_sys::{HtmlInputElement, KeyboardEvent}; |
| 6 | +use yew::html::onchange::Event; |
| 7 | +use yew::virtual_dom::VNode; |
| 8 | +use yew::{classes, function_component, html, use_effect_with_deps, use_state, Callback, Html, TargetCast}; |
| 9 | +use yew_hooks::use_local_storage; |
| 10 | + |
| 11 | +use self::diff_algo::DiffAlgo; |
| 12 | +use self::diff_viewer::DiffViewer; |
| 13 | + |
| 14 | +const DEFAULT_ORIGINAL: &str = "TheBestTvarynka |
| 15 | +TheBestTvarynka |
| 16 | +TheBestTvarynka"; |
| 17 | +const DEFAULT_CHANGED: &str = "thebesttravynka |
| 18 | +thebesttravynka |
| 19 | +thebesttravynka |
| 20 | +"; |
| 21 | +const DEFAULT_ALGORITHM: DiffAlgo = DiffAlgo(Algorithm::Myers); |
| 22 | + |
| 23 | +const LOCAL_STORAGE_ORIGINAL: &str = "ORIGINAL_DATA"; |
| 24 | +const LOCAL_STORAGE_ALGORITHM: &str = "ALGORITHM"; |
| 25 | +const LOCAL_STORAGE_CHANGED: &str = "CHANGED_DATA"; |
| 26 | + |
| 27 | +const ALL_ALGORITHMS: &[DiffAlgo] = &[ |
| 28 | + DiffAlgo(Algorithm::Myers), |
| 29 | + DiffAlgo(Algorithm::Lcs), |
| 30 | + DiffAlgo(Algorithm::Patience), |
| 31 | +]; |
| 32 | + |
| 33 | +#[derive(Debug, Clone, PartialEq)] |
| 34 | +struct DiffData { |
| 35 | + pub original: Vec<char>, |
| 36 | + pub changed: Vec<char>, |
| 37 | + pub changes: Vec<DiffOp>, |
| 38 | +} |
| 39 | + |
| 40 | +impl DiffData { |
| 41 | + pub fn empty() -> Self { |
| 42 | + Self { |
| 43 | + original: Vec::new(), |
| 44 | + changed: Vec::new(), |
| 45 | + changes: Vec::new(), |
| 46 | + } |
| 47 | + } |
| 48 | +} |
| 49 | + |
| 50 | +fn render_algorithm_options(current_algorithm: DiffAlgo) -> Vec<VNode> { |
| 51 | + ALL_ALGORITHMS |
| 52 | + .iter() |
| 53 | + .map(|algo| { |
| 54 | + html! { |
| 55 | + <option selected={current_algorithm == *algo} value={algo.to_string()}>{algo}</option> |
| 56 | + } |
| 57 | + }) |
| 58 | + .collect() |
| 59 | +} |
| 60 | + |
| 61 | +#[function_component(DiffPage)] |
| 62 | +pub fn diff_page() -> Html { |
| 63 | + let original = use_state(|| DEFAULT_ORIGINAL.to_owned()); |
| 64 | + let changed = use_state(|| DEFAULT_CHANGED.to_owned()); |
| 65 | + let algorithm = use_state(|| DEFAULT_ALGORITHM); |
| 66 | + let diffs = use_state(|| { |
| 67 | + let original = DEFAULT_ORIGINAL.chars().collect::<Vec<_>>(); |
| 68 | + let changed = DEFAULT_CHANGED.chars().collect::<Vec<_>>(); |
| 69 | + let changes = TextDiff::configure() |
| 70 | + .algorithm(DEFAULT_ALGORITHM.into()) |
| 71 | + .newline_terminated(true) |
| 72 | + .diff_chars(DEFAULT_ORIGINAL, DEFAULT_CHANGED); |
| 73 | + |
| 74 | + DiffData { |
| 75 | + original, |
| 76 | + changed, |
| 77 | + changes: changes.ops().to_owned(), |
| 78 | + } |
| 79 | + }); |
| 80 | + |
| 81 | + let original_data = original.chars().collect::<Vec<_>>(); |
| 82 | + let changed_data = changed.chars().collect::<Vec<_>>(); |
| 83 | + let diffs_setter = diffs.setter(); |
| 84 | + let algo = *algorithm; |
| 85 | + let compute_diff = Callback::from(move |_: ()| { |
| 86 | + let changes = capture_diff_slices(algo.into(), &original_data, &changed_data); |
| 87 | + |
| 88 | + diffs_setter.set(DiffData { |
| 89 | + original: original_data.clone(), |
| 90 | + changed: changed_data.clone(), |
| 91 | + changes, |
| 92 | + }); |
| 93 | + }); |
| 94 | + |
| 95 | + let original_local_storage = use_local_storage::<String>(LOCAL_STORAGE_ORIGINAL.to_owned()); |
| 96 | + let original_setter = original.setter(); |
| 97 | + let changed_local_storage = use_local_storage::<String>(LOCAL_STORAGE_CHANGED.to_owned()); |
| 98 | + let changed_setter = changed.setter(); |
| 99 | + let algorithm_local_storage = use_local_storage::<String>(LOCAL_STORAGE_ALGORITHM.to_owned()); |
| 100 | + let algorithm_setter = algorithm.setter(); |
| 101 | + let diffs_setter = diffs.setter(); |
| 102 | + use_effect_with_deps( |
| 103 | + move |_: &[(); 0]| { |
| 104 | + let mut flag = false; |
| 105 | + |
| 106 | + if let Some(original) = (*original_local_storage).as_ref() { |
| 107 | + original_setter.set(original.to_string()); |
| 108 | + flag = true; |
| 109 | + } |
| 110 | + if let Some(changed) = (*changed_local_storage).as_ref() { |
| 111 | + changed_setter.set(changed.to_string()); |
| 112 | + flag = true; |
| 113 | + } |
| 114 | + if let Some(raw_algorithm) = (*algorithm_local_storage).as_ref() { |
| 115 | + if let Ok(algorithm) = raw_algorithm.as_str().try_into() { |
| 116 | + algorithm_setter.set(algorithm); |
| 117 | + flag = true; |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + if flag { |
| 122 | + diffs_setter.set(DiffData::empty()); |
| 123 | + } |
| 124 | + }, |
| 125 | + [], |
| 126 | + ); |
| 127 | + |
| 128 | + let local_storage = use_local_storage::<String>(LOCAL_STORAGE_ORIGINAL.to_owned()); |
| 129 | + use_effect_with_deps( |
| 130 | + move |[original]| { |
| 131 | + local_storage.set((*original).to_string()); |
| 132 | + }, |
| 133 | + [original.clone()], |
| 134 | + ); |
| 135 | + |
| 136 | + let local_storage = use_local_storage::<String>(LOCAL_STORAGE_CHANGED.to_owned()); |
| 137 | + use_effect_with_deps( |
| 138 | + move |[changed]| { |
| 139 | + local_storage.set((*changed).to_string()); |
| 140 | + }, |
| 141 | + [changed.clone()], |
| 142 | + ); |
| 143 | + |
| 144 | + let local_storage = use_local_storage::<String>(LOCAL_STORAGE_ALGORITHM.to_owned()); |
| 145 | + use_effect_with_deps( |
| 146 | + move |[algorithm]| { |
| 147 | + local_storage.set((*algorithm).to_string()); |
| 148 | + }, |
| 149 | + [algorithm.clone()], |
| 150 | + ); |
| 151 | + |
| 152 | + let original_setter = original.setter(); |
| 153 | + let on_original_input = Callback::from(move |event: html::oninput::Event| { |
| 154 | + let input: HtmlInputElement = event.target_unchecked_into(); |
| 155 | + original_setter.set(input.value()); |
| 156 | + }); |
| 157 | + |
| 158 | + let changed_setter = changed.setter(); |
| 159 | + let on_changed_input = Callback::from(move |event: html::oninput::Event| { |
| 160 | + let input: HtmlInputElement = event.target_unchecked_into(); |
| 161 | + changed_setter.set(input.value()); |
| 162 | + }); |
| 163 | + |
| 164 | + let diff = compute_diff.clone(); |
| 165 | + let onclick = Callback::from(move |_| { |
| 166 | + diff.emit(()); |
| 167 | + }); |
| 168 | + |
| 169 | + let algorithm_setter = algorithm.setter(); |
| 170 | + let on_algorithm_change = Callback::from(move |event: Event| { |
| 171 | + let input: HtmlInputElement = event.target_unchecked_into(); |
| 172 | + if let Ok(algorithm) = input.value().as_str().try_into() { |
| 173 | + algorithm_setter.set(algorithm); |
| 174 | + } |
| 175 | + }); |
| 176 | + |
| 177 | + let onkeydown = Callback::from(move |event: KeyboardEvent| { |
| 178 | + if event.ctrl_key() && event.code() == "Enter" { |
| 179 | + compute_diff.emit(()); |
| 180 | + } |
| 181 | + }); |
| 182 | + |
| 183 | + html! { |
| 184 | + <div class={classes!("vertical", "asn1-page")} {onkeydown}> |
| 185 | + <div class="horizontal"> |
| 186 | + <span>{"Diff algorithm:"}</span> |
| 187 | + <div> |
| 188 | + <select class="base-input" onchange={on_algorithm_change}> |
| 189 | + {render_algorithm_options(*algorithm)} |
| 190 | + </select> |
| 191 | + </div> |
| 192 | + </div> |
| 193 | + <div class="horizontal"> |
| 194 | + <textarea |
| 195 | + rows="8" |
| 196 | + placeholder={"original"} |
| 197 | + class="base-input" |
| 198 | + value={(*original).clone()} |
| 199 | + oninput={on_original_input} |
| 200 | + /> |
| 201 | + <textarea |
| 202 | + rows="8" |
| 203 | + placeholder={"changed"} |
| 204 | + class="base-input" |
| 205 | + value={(*changed).clone()} |
| 206 | + oninput={on_changed_input} |
| 207 | + /> |
| 208 | + </div> |
| 209 | + <div class="horizontal"> |
| 210 | + <button class="action-button" onclick={onclick}>{"Diff"}</button> |
| 211 | + <span class="total">{"(ctrl+enter)"}</span> |
| 212 | + </div> |
| 213 | + <DiffViewer diff={(*diffs).clone()} /> |
| 214 | + </div> |
| 215 | + } |
| 216 | +} |
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