undo/redo

src/tui/filter.rs

@@ -1,13 +1,34 @@
 use regex::bytes::Regex;
+use serde::{Deserialize, Serialize};
 
 use crate::tui::{
-    log_viewer::{FieldMatcher, InputTarget, LogViewer},
+    log_viewer::{
+        LogViewer,
+        input::{FieldMatcher, InputTarget},
+    },
     model::LogEntry,
 };
 
+mod serialize_regex {
+    use regex::bytes::Regex;
+    use serde::{Deserialize, Deserializer, Serialize, Serializer, de::Error};
+
+    pub fn serialize<S: Serializer>(r: &Regex, serializer: S) -> Result<S::Ok, S::Error> {
+        r.as_str().serialize(serializer)
+    }
+    pub fn deserialize<'de, D>(deserializer: D) -> Result<Regex, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let s = String::deserialize(deserializer)?;
+        Regex::new(&s).map_err(|e| D::Error::custom(e.to_string()))
+    }
+}
+
+#[derive(Serialize, Deserialize)]
 pub enum MatcherValue {
     Exact(String),
-    Regex(Regex),
+    Regex(#[serde(with = "serialize_regex")] Regex),
     Prefix(String),
     Contains(String),
 }
@@ -32,6 +53,7 @@ impl MatcherValue {
     }
 }
 
+#[derive(Serialize, Deserialize)]
 pub enum Matcher {
     Field { name: String, value: MatcherValue },
     Message { value: MatcherValue },
@@ -76,12 +98,13 @@ impl Matcher {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub enum FilterKind {
     Inline,
     Remove,
 }
 
+#[derive(Serialize, Deserialize)]
 pub struct Filter {
     pub matcher: Matcher,
     pub kind: FilterKind,

src/tui/log_viewer/filters.rs

@@ -0,0 +1,41 @@
+use std::rc::Rc;
+
+use serde::{Deserialize, Serialize};
+
+use crate::tui::filter::Filter;
+
+#[derive(Serialize, Deserialize)]
+pub struct Filters {
+    filters: Vec<Rc<Filter>>,
+    undo_pos: usize,
+}
+
+impl Filters {
+    pub fn new() -> Self {
+        Self {
+            filters: Vec::new(),
+            undo_pos: 0,
+        }
+    }
+
+    pub fn get(&self) -> &[Rc<Filter>] {
+        &self.filters[0..self.undo_pos]
+    }
+
+    pub fn push(&mut self, filter: Rc<Filter>) {
+        self.filters.truncate(self.undo_pos);
+        self.filters.push(filter);
+        self.undo_pos = self.filters.len();
+    }
+
+    pub fn redo(&mut self) {
+        self.undo_pos += 1;
+        if self.undo_pos > self.filters.len() {
+            self.undo_pos = self.filters.len()
+        }
+    }
+
+    pub fn undo(&mut self) {
+        self.undo_pos = self.undo_pos.saturating_sub(1);
+    }
+}

src/tui/log_viewer/input.rs

@@ -0,0 +1,109 @@
+use std::mem;
+
+use ratatui::{buffer::Buffer, layout::Rect, text::Line, widgets::Widget};
+
+use crate::tui::widgets::styled::Styled;
+
+#[derive(Clone)]
+pub enum FieldMatcher {
+    EqualTo,
+    Prefix(String),
+    Regex(String),
+    Contains(String),
+}
+
+impl FieldMatcher {
+    pub fn show(&self) -> String {
+        match self {
+            FieldMatcher::EqualTo => "equal to selected value".to_string(),
+            Self::Prefix(s) => format!("with a prefix of `{s}`"),
+            Self::Regex(s) => format!("matching /{s}/"),
+            Self::Contains(s) => format!("containing `{s}`"),
+        }
+    }
+}
+
+#[derive(Clone)]
+pub enum InputTarget {
+    Fields(Option<FieldMatcher>),
+    Text(FieldMatcher),
+    This,
+    Surround,
+}
+
+impl InputTarget {
+    pub fn show(&self) -> String {
+        match self {
+            Self::Fields(None) => "logs with a field...".to_string(),
+            Self::Fields(Some(fm)) => format!("logs with the selected field {}", fm.show()),
+            Self::Text(fm) => format!("logs {}", fm.show()),
+            Self::This => format!("this log"),
+            Self::Surround => format!("the log surrounding the current view"),
+        }
+    }
+}
+
+#[derive(Clone)]
+pub enum InputState {
+    None,
+    Target(InputTarget),
+}
+
+impl Widget for Styled<'_, &InputState> {
+    fn render(self, area: Rect, buf: &mut Buffer)
+    where
+        Self: Sized,
+    {
+        Line::from(self.inner.show())
+            .style(self.styles.default)
+            .render(area, buf)
+    }
+}
+
+impl InputState {
+    pub fn capture_string(&mut self) -> Option<&mut String> {
+        match self {
+            InputState::None => None,
+            InputState::Target(InputTarget::This) => None,
+            InputState::Target(InputTarget::Fields(None)) => None,
+            InputState::Target(InputTarget::Surround) => None,
+
+            // require arbitrary text input
+            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Contains(s)))) => Some(s),
+            InputState::Target(InputTarget::Text(FieldMatcher::Contains(s))) => Some(s),
+            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Prefix(s)))) => Some(s),
+            InputState::Target(InputTarget::Text(FieldMatcher::Prefix(s))) => Some(s),
+            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Regex(s)))) => Some(s),
+            InputState::Target(InputTarget::Text(FieldMatcher::Regex(s))) => Some(s),
+
+            InputState::Target(InputTarget::Fields(Some(FieldMatcher::EqualTo))) => None,
+            InputState::Target(InputTarget::Text(FieldMatcher::EqualTo)) => None,
+        }
+    }
+
+    pub fn captures_input(&mut self) -> bool {
+        self.capture_string().is_some()
+    }
+
+    pub fn show(&self) -> String {
+        match self {
+            InputState::None => "".to_string(),
+            InputState::Target(input_target) => input_target.show(),
+        }
+    }
+
+    pub fn reset(&mut self) {
+        *self = Self::None;
+    }
+
+    pub fn target(&mut self, target: InputTarget) {
+        if let Self::Target(t) = self
+            && mem::discriminant(t) == mem::discriminant(&target)
+            && !self.captures_input()
+        {
+            self.reset();
+        } else {
+            *self = Self::Target(target);
+        }
+    }
+}

src/tui/log_viewer/mod.rs

@@ -2,147 +2,24 @@ use std::{collections::HashMap, iter, mem, rc::Rc};
 
 use crate::tui::{
     filter::Filter,
+    log_viewer::{
+        filters::Filters,
+        input::{FieldMatcher, InputState, InputTarget},
+        view::LogView,
+    },
     model::LogEntry,
     processing::{IntoLogStream, LogStream},
-    widgets::styled::Styled,
 };
-use ratatui::{buffer::Buffer, layout::Rect, text::Line, widgets::Widget};
 use tui_widget_list::ListState;
 
-pub struct LogView {
-    iter: Box<dyn LogStream>,
-    selection_offset: usize,
-}
-
-impl LogView {
-    pub fn selected(&self) -> Option<(Rc<LogEntry>, usize)> {
-        let mut temp_iter = self.iter.clone();
-        for _ in 0..self.selection_offset {
-            let _ = temp_iter.next()?;
-        }
-
-        temp_iter.next()
-    }
-}
-
-impl Clone for LogView {
-    fn clone(&self) -> Self {
-        Self {
-            iter: self.iter.clone(),
-            selection_offset: self.selection_offset.clone(),
-        }
-    }
-}
-
-#[derive(Clone)]
-pub enum FieldMatcher {
-    EqualTo,
-    Prefix(String),
-    Regex(String),
-    Contains(String),
-}
-
-impl FieldMatcher {
-    pub fn show(&self) -> String {
-        match self {
-            FieldMatcher::EqualTo => "equal to selected value".to_string(),
-            Self::Prefix(s) => format!("with a prefix of `{s}`"),
-            Self::Regex(s) => format!("matching /{s}/"),
-            Self::Contains(s) => format!("containing `{s}`"),
-        }
-    }
-}
-
-#[derive(Clone)]
-pub enum InputTarget {
-    Fields(Option<FieldMatcher>),
-    Text(FieldMatcher),
-    This,
-    Surround,
-}
-
-impl InputTarget {
-    pub fn show(&self) -> String {
-        match self {
-            Self::Fields(None) => "logs with a field...".to_string(),
-            Self::Fields(Some(fm)) => format!("logs with the selected field {}", fm.show()),
-            Self::Text(fm) => format!("logs {}", fm.show()),
-            Self::This => format!("this log"),
-            Self::Surround => format!("the log surrounding the current view"),
-        }
-    }
-}
-
-#[derive(Clone)]
-pub enum InputState {
-    None,
-    Target(InputTarget),
-}
-
-impl Widget for Styled<'_, &InputState> {
-    fn render(self, area: Rect, buf: &mut Buffer)
-    where
-        Self: Sized,
-    {
-        Line::from(self.inner.show())
-            .style(self.styles.default)
-            .render(area, buf)
-    }
-}
-
-impl InputState {
-    pub fn capture_string(&mut self) -> Option<&mut String> {
-        match self {
-            InputState::None => None,
-            InputState::Target(InputTarget::This) => None,
-            InputState::Target(InputTarget::Fields(None)) => None,
-            InputState::Target(InputTarget::Surround) => None,
-
-            // require arbitrary text input
-            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Contains(s)))) => Some(s),
-            InputState::Target(InputTarget::Text(FieldMatcher::Contains(s))) => Some(s),
-            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Prefix(s)))) => Some(s),
-            InputState::Target(InputTarget::Text(FieldMatcher::Prefix(s))) => Some(s),
-            InputState::Target(InputTarget::Fields(Some(FieldMatcher::Regex(s)))) => Some(s),
-            InputState::Target(InputTarget::Text(FieldMatcher::Regex(s))) => Some(s),
-
-            InputState::Target(InputTarget::Fields(Some(FieldMatcher::EqualTo))) => None,
-            InputState::Target(InputTarget::Text(FieldMatcher::EqualTo)) => None,
-        }
-    }
-
-    pub fn captures_input(&mut self) -> bool {
-        self.capture_string().is_some()
-    }
-
-    pub fn show(&self) -> String {
-        match self {
-            InputState::None => "".to_string(),
-            InputState::Target(input_target) => input_target.show(),
-        }
-    }
-
-    pub fn reset(&mut self) {
-        *self = Self::None;
-    }
-
-    pub fn target(&mut self, target: InputTarget) {
-        if let Self::Target(t) = self
-            && mem::discriminant(t) == mem::discriminant(&target)
-            && !self.captures_input()
-        {
-            self.reset();
-        } else {
-            *self = Self::Target(target);
-        }
-    }
-}
+pub mod filters;
+pub mod input;
+pub mod view;
 
 pub struct LogViewer {
     pub stack: Vec<LogView>,
     curr: LogView,
     cache: HashMap<Vec<usize>, LogView>,
-    filters: Vec<Rc<Filter>>,
 
     pub root_stream: Box<dyn LogStream>,
 
@@ -152,7 +29,7 @@ pub struct LogViewer {
     pub last_fields_height: usize,
 
     pub footer_list: ListState,
-
+    filters: Filters,
     pub input_state: InputState,
 }
 
@@ -173,22 +50,21 @@ impl LogViewer {
             last_fields_offset: 0,
             last_fields_height: 0,
 
-            filters: Vec::new(),
+            filters: Filters::new(),
             input_state: InputState::None,
         }
     }
 
     pub fn filtered_root_stream(&self) -> Box<dyn LogStream> {
         let mut curr = self.root_stream.clone();
-        for filter in &self.filters {
+        for filter in self.filters.get() {
             curr = Box::new(curr.filter(Rc::clone(filter)));
         }
 
         curr
     }
 
-    pub fn add_filter(&mut self, filter: Rc<Filter>) {
-        self.filters.push(Rc::clone(&filter));
+    fn update_filters(&mut self) {
         self.cache.clear();
         let offsets_list: Vec<_> = self
             .stack
@@ -230,9 +106,9 @@ impl LogViewer {
 
             // If the value we're looking for is removed by the filter,
             // we'll have a hard time finding it so quit
-            if filter.removes(&elem) {
-                break;
-            }
+            // if filter.removes(&elem) {
+            //     break;
+            // }
 
             // find the nearest stream in which this element can be found
             let mut curr = current_stream.as_ref();
@@ -286,6 +162,11 @@ impl LogViewer {
         self.stack = new_stack;
     }
 
+    pub fn add_filter(&mut self, filter: Rc<Filter>) {
+        self.filters.push(Rc::clone(&filter));
+        self.update_filters();
+    }
+
     pub fn update_num_items(&mut self, num_visible_items: usize) {
         while self.curr.selection_offset >= num_visible_items {
             if self.curr.selection_offset == 0 {
@@ -436,6 +317,16 @@ impl LogViewer {
         self.input_state.reset();
     }
 
+    pub fn undo(&mut self) {
+        self.filters.undo();
+        self.update_filters();
+    }
+
+    pub fn redo(&mut self) {
+        self.filters.redo();
+        self.update_filters();
+    }
+
     pub fn enter(&mut self) {
         match self.input_state {
             InputState::None => {

src/tui/log_viewer/view.rs

@@ -0,0 +1,28 @@
+use std::rc::Rc;
+
+use crate::tui::{model::LogEntry, processing::LogStream};
+
+pub struct LogView {
+    pub iter: Box<dyn LogStream>,
+    pub selection_offset: usize,
+}
+
+impl LogView {
+    pub fn selected(&self) -> Option<(Rc<LogEntry>, usize)> {
+        let mut temp_iter = self.iter.clone();
+        for _ in 0..self.selection_offset {
+            let _ = temp_iter.next()?;
+        }
+
+        temp_iter.next()
+    }
+}
+
+impl Clone for LogView {
+    fn clone(&self) -> Self {
+        Self {
+            iter: self.iter.clone(),
+            selection_offset: self.selection_offset.clone(),
+        }
+    }
+}

src/tui/mod.rs

@@ -14,15 +14,13 @@ use std::{
 use tui_widget_list::{ListBuilder, ListView};
 
 use crate::tui::{
-    filter::FilterKind,
-    log_viewer::{InputState, InputTarget, LogViewer},
-    widgets::{hyperlink::Hyperlink, items::Items, last_error::LastError},
-};
-use crate::tui::{
-    filter::{Filter, Matcher},
-    log_viewer::FieldMatcher,
+    filter::{Filter, FilterKind, Matcher},
+    log_viewer::{
+        LogViewer,
+        input::{FieldMatcher, InputState, InputTarget},
+    },
     reader::LogfileReader,
-    widgets::styled::IntoStyled,
+    widgets::{hyperlink::Hyperlink, items::Items, last_error::LastError, styled::IntoStyled},
 };
 use ratatui::{
     DefaultTerminal, Terminal,
@@ -67,7 +65,6 @@ targeting logs:
 either a field after `f` or the text of the current log:
     p                   ... with a prefix
     r                   ... matching a regex
-    /                   ... matching a regex
     e                   ... equal to selected
     c                   ... containing
 
@@ -298,6 +295,10 @@ impl App {
                 KeyCode::Backspace | KeyCode::Left => lv.back(),
                 KeyCode::Right => lv.enter(),
                 KeyCode::Enter => lv.enter(),
+
+                KeyCode::Char('u') => lv.undo(),
+                KeyCode::Char('r') => lv.redo(),
+
                 KeyCode::Char('f') => {
                     lv.input_state.target(InputTarget::Fields(None));
                     lv.footer_list.select(Some(0));
@@ -309,7 +310,7 @@ impl App {
                 KeyCode::Char('t') => {
                     lv.input_state.target(InputTarget::This);
                 }
-                KeyCode::Char('r') | KeyCode::Char('/') => {
+                KeyCode::Char('/') => {
                     let v = FieldMatcher::Regex(String::new());
                     if let InputState::Target(InputTarget::Fields(f @ None)) = &mut lv.input_state {
                         *f = Some(v);

src/tui/widgets/items.rs

@@ -5,7 +5,7 @@ use ratatui::widgets::{List, ListItem, Widget};
 use regex::Regex;
 
 use crate::tui::{
-    log_viewer::{FieldMatcher, InputState, InputTarget},
+    log_viewer::input::{FieldMatcher, InputState, InputTarget},
     model::LogEntry,
     widgets::{
         last_error::LastError,