From 924684215abafe1b3c08315472ee844d198aca72 Mon Sep 17 00:00:00 2001
From: FliegendeWurst <2012gdwu+github@posteo.de>
Date: Mon, 20 Jun 2022 15:42:27 +0200
Subject: [PATCH] Misc. hacks

---
 cursive-core/src/backend.rs                   |  4 +++
 cursive-core/src/cursive_run.rs               |  3 ++-
 cursive-core/src/lib.rs                       |  1 +
 .../src/utils/lines/spans/chunk_iterator.rs   | 19 +++++++++++---
 .../src/utils/lines/spans/lines_iterator.rs   | 21 ++++++++++++++-
 cursive-core/src/utils/lines/spans/mod.rs     |  2 +-
 cursive-core/src/view/any.rs                  |  2 +-
 cursive-core/src/view/scroll/core.rs          |  7 +++--
 cursive-core/src/views/scroll_view.rs         |  8 ++++++
 cursive-core/src/views/text_view.rs           | 25 +++++++++++++-----
 cursive/src/backends/termion.rs               | 26 +++++++++++++++++--
 11 files changed, 100 insertions(+), 18 deletions(-)

diff --git a/cursive-core/src/backend.rs b/cursive-core/src/backend.rs
index 4a03211..508739a 100644
--- a/cursive-core/src/backend.rs
+++ b/cursive-core/src/backend.rs
@@ -31,6 +31,10 @@ use unicode_width::UnicodeWidthStr;
 /// [1]: ../struct.Cursive.html#method.new
 /// [`Event`]: ../event/enum.Event.html
 pub trait Backend {
+    /// .
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        panic!()
+    }
     /// Polls the backend for any input.
     ///
     /// Should return immediately:
diff --git a/cursive-core/src/cursive_run.rs b/cursive-core/src/cursive_run.rs
index b22b6dc..9117dd3 100644
--- a/cursive-core/src/cursive_run.rs
+++ b/cursive-core/src/cursive_run.rs
@@ -13,7 +13,8 @@ const INPUT_POLL_DELAY_MS: u64 = 30;
 /// The `C` type is usually either `Cursive` or `&mut Cursive`.
 pub struct CursiveRunner<C> {
     siv: C,
-    backend: Box<dyn backend::Backend>,
+    /// .
+    pub backend: Box<dyn backend::Backend>,
     boring_frame_count: u32,
     // Last layer sizes of the stack view.
     // If it changed, clear the screen.
diff --git a/cursive-core/src/lib.rs b/cursive-core/src/lib.rs
index 234f6ce..faa35d6 100644
--- a/cursive-core/src/lib.rs
+++ b/cursive-core/src/lib.rs
@@ -68,6 +68,7 @@ pub use self::cursive_run::CursiveRunner;
 pub use self::dump::Dump;
 pub use self::printer::Printer;
 pub use self::rect::Rect;
+pub use self::utils::lines::spans::WrapMethod;
 pub use self::vec::Vec2;
 pub use self::view::View;
 pub use self::with::With;
diff --git a/cursive-core/src/utils/lines/spans/chunk_iterator.rs b/cursive-core/src/utils/lines/spans/chunk_iterator.rs
index 13fc350..cd7623c 100644
--- a/cursive-core/src/utils/lines/spans/chunk_iterator.rs
+++ b/cursive-core/src/utils/lines/spans/chunk_iterator.rs
@@ -1,3 +1,4 @@
+use super::WrapMethod;
 use super::chunk::Chunk;
 use super::segment::Segment;
 use crate::utils::span::SpannedText;
@@ -18,15 +19,18 @@ pub struct ChunkIterator<S> {
 
     /// How much of the current span has been processed already.
     offset: usize,
+
+    wrap_method: WrapMethod,
 }
 
 impl<S> ChunkIterator<S> {
     /// Creates a new ChunkIterator on the given styled string.
-    pub fn new(source: Rc<S>) -> Self {
+    pub fn new(source: Rc<S>, wrap_method: WrapMethod) -> Self {
         ChunkIterator {
             source,
             current_span: 0,
             offset: 0,
+            wrap_method,
         }
     }
 }
@@ -63,7 +67,9 @@ where
         let mut segments: Vec<Segment> = Vec::new();
 
         // We'll use an iterator from xi-unicode to detect possible breaks.
-        let mut iter = LineBreakLeafIter::new(span_text, self.offset);
+        let mut iter = if self.wrap_method == WrapMethod::XiUnicode {
+            Some(LineBreakLeafIter::new(span_text, self.offset))
+         } else { None };
 
         // When we reach the end of a span, xi-unicode returns a break, but it
         // actually depends on the next span. Such breaks are "fake" breaks.
@@ -77,7 +83,14 @@ where
             // Look at next possible break
             // `hard_stop = true` means that the break is non-optional,
             // like after a `\n`.
-            let (pos, hard_stop) = iter.next(span_text);
+            let (pos, mut hard_stop) = if let Some(iter) = iter.as_mut() {
+                iter.next(span_text)
+            } else {
+                span_text[self.offset..].find('\n').map(|x| (x + self.offset + 1, true)).unwrap_or((span_text.len(), false))
+            };
+            if pos == span_text.len() && iter.is_none() {
+                hard_stop = false;
+            }
 
             // When xi-unicode reaches the end of a span, it returns a "fake"
             // break. To know if it's actually a true break, we need to give
diff --git a/cursive-core/src/utils/lines/spans/lines_iterator.rs b/cursive-core/src/utils/lines/spans/lines_iterator.rs
index c2b5833..70bc699 100644
--- a/cursive-core/src/utils/lines/spans/lines_iterator.rs
+++ b/cursive-core/src/utils/lines/spans/lines_iterator.rs
@@ -10,6 +10,19 @@ use std::rc::Rc;
 use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
 
+// TODO docs
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+/// Wrapping method
+pub enum WrapMethod {
+    /// Default wrapping method based on xi-unicode.
+    XiUnicode,
+    /// Wrap when row width is exceeded
+    Newlines,
+    /// Do not wrap
+    Dont
+}
+
 /// Generates rows of text in constrainted width.
 ///
 /// Works on spans of text.
@@ -41,7 +54,7 @@ where
         let source = Rc::new(source);
         let chunk_source = source.clone();
         LinesIterator {
-            iter: ChunkIterator::new(chunk_source).peekable(),
+            iter: ChunkIterator::new(chunk_source, WrapMethod::XiUnicode).peekable(),
             source,
             width,
             chunk_offset: ChunkPart::default(),
@@ -49,6 +62,12 @@ where
         }
     }
 
+    /// Set the wrapping method. Resets the iterator position.
+    pub fn with_method(mut self, wrap_method: WrapMethod) -> Self {
+        self.iter = ChunkIterator::new(self.source.clone(), wrap_method).peekable();
+        self
+    }
+
     /// Leave a blank cell at the end of lines.
     ///
     /// Unless a word had to be truncated, in which case
diff --git a/cursive-core/src/utils/lines/spans/mod.rs b/cursive-core/src/utils/lines/spans/mod.rs
index ab4c275..aeb61b8 100644
--- a/cursive-core/src/utils/lines/spans/mod.rs
+++ b/cursive-core/src/utils/lines/spans/mod.rs
@@ -15,6 +15,6 @@ mod segment_merge_iterator;
 #[cfg(test)]
 mod tests;
 
-pub use self::lines_iterator::LinesIterator;
+pub use self::lines_iterator::{LinesIterator, WrapMethod};
 pub use self::row::Row;
 pub use self::segment::Segment;
diff --git a/cursive-core/src/view/any.rs b/cursive-core/src/view/any.rs
index 705197d..93ee09d 100644
--- a/cursive-core/src/view/any.rs
+++ b/cursive-core/src/view/any.rs
@@ -1,4 +1,4 @@
-use crate::view::View;
+use crate::{cursive, view::View};
 use std::any::Any;
 
 /// A view that can be downcasted to its concrete type.
diff --git a/cursive-core/src/view/scroll/core.rs b/cursive-core/src/view/scroll/core.rs
index 0a29281..ea0a421 100644
--- a/cursive-core/src/view/scroll/core.rs
+++ b/cursive-core/src/view/scroll/core.rs
@@ -227,7 +227,7 @@ impl Core {
         self.last_available = last_size.saturating_sub(
             scrolling
                 .swap()
-                .select_or(self.scrollbar_padding + (1, 1), Vec2::zero()),
+                .select_or(if self.show_scrollbars { self.scrollbar_padding + (1, 1) } else { Vec2::zero() }, Vec2::zero()),
         );
     }
 
@@ -523,7 +523,7 @@ impl Core {
     }
 
     /// Clears the cache.
-    fn invalidate_cache(&mut self) {
+    pub(crate) fn invalidate_cache(&mut self) {
         self.size_cache = None;
     }
 
@@ -544,6 +544,9 @@ impl Core {
     ///
     /// The scrollbar_size().x will be the horizontal space taken by the vertical scrollbar.
     pub fn scrollbar_size(&self) -> Vec2 {
+        if !self.show_scrollbars {
+            return Vec2::zero();
+        }
         self.is_scrolling()
             .swap()
             .select_or(self.scrollbar_padding + (1, 1), Vec2::zero())
diff --git a/cursive-core/src/views/scroll_view.rs b/cursive-core/src/views/scroll_view.rs
index 5a56a8f..4ff0cec 100644
--- a/cursive-core/src/views/scroll_view.rs
+++ b/cursive-core/src/views/scroll_view.rs
@@ -99,6 +99,14 @@ impl<V> ScrollView<V> {
     ///
     /// Defaults to `true`.
     pub fn set_show_scrollbars(&mut self, show_scrollbars: bool) {
+        /*
+        let mut xy = self.core.inner_size();
+        if show_scrollbars {
+            xy.x -= 2;
+        } else {
+            xy.x += 2;
+        }
+        self.core.set_inner_size(xy);*/
         self.core.set_show_scrollbars(show_scrollbars);
     }
 
diff --git a/cursive-core/src/views/text_view.rs b/cursive-core/src/views/text_view.rs
index 0e72b53..be179c6 100644
--- a/cursive-core/src/views/text_view.rs
+++ b/cursive-core/src/views/text_view.rs
@@ -7,7 +7,7 @@ use unicode_width::UnicodeWidthStr;
 
 use crate::align::*;
 use crate::theme::{Effect, Style};
-use crate::utils::lines::spans::{LinesIterator, Row};
+use crate::utils::lines::spans::{LinesIterator, Row, WrapMethod};
 use crate::utils::markup::StyledString;
 use crate::view::{SizeCache, View};
 use crate::{Printer, Vec2, With, XY};
@@ -197,8 +197,7 @@ pub struct TextView {
 
     style: Style,
 
-    // True if we can wrap long lines.
-    wrap: bool,
+    wrap: WrapMethod,
 
     // ScrollBase make many scrolling-related things easier
     last_size: Vec2,
@@ -235,7 +234,7 @@ impl TextView {
             content,
             style: Style::default(),
             rows: Vec::new(),
-            wrap: true,
+            wrap: WrapMethod::XiUnicode,
             align: Align::top_left(),
             last_size: Vec2::zero(),
             width: None,
@@ -284,7 +283,16 @@ impl TextView {
     ///
     /// If `true` (the default), text will wrap long lines when needed.
     pub fn set_content_wrap(&mut self, wrap: bool) {
-        self.wrap = wrap;
+        if wrap {
+            self.wrap = WrapMethod::XiUnicode;
+        } else {
+            self.wrap = WrapMethod::Dont;
+        }
+    }
+
+    /// TODO docs
+    pub fn set_wrap_method(&mut self, method: WrapMethod) {
+        self.wrap = method;
     }
 
     /// Sets the horizontal alignment for this view.
@@ -357,7 +365,8 @@ impl TextView {
     // This must be non-destructive, as it may be called
     // multiple times during layout.
     fn compute_rows(&mut self, size: Vec2) {
-        let size = if self.wrap { size } else { Vec2::max_value() };
+        eprintln!("computing rows with {:?}!", size);
+        let size = if self.wrap != WrapMethod::Dont { size } else { Vec2::max_value() };
 
         let mut content = self.content.content.lock().unwrap();
         if content.is_cache_valid(size) {
@@ -375,7 +384,7 @@ impl TextView {
         }
 
         self.rows =
-            LinesIterator::new(content.get_cache().as_ref(), size.x).collect();
+            LinesIterator::new(content.get_cache().as_ref(), size.x).with_method(self.wrap).collect();
 
         // Desired width
         self.width = if self.rows.iter().any(|row| row.is_wrapped) {
@@ -422,12 +431,14 @@ impl View for TextView {
     }
 
     fn required_size(&mut self, size: Vec2) -> Vec2 {
+        eprintln!("required_size {:?}", size);
         self.compute_rows(size);
 
         Vec2::new(self.width.unwrap_or(0), self.rows.len())
     }
 
     fn layout(&mut self, size: Vec2) {
+        eprintln!("layout {:?}", size);
         // Compute the text rows.
         self.last_size = size;
         self.compute_rows(size);
diff --git a/cursive/src/backends/termion.rs b/cursive/src/backends/termion.rs
index b86220f..e1f338f 100644
--- a/cursive/src/backends/termion.rs
+++ b/cursive/src/backends/termion.rs
@@ -29,8 +29,8 @@ use std::thread;
 
 /// Backend using termion
 pub struct Backend {
-    // Do we want to make this generic on the writer?
-    terminal:
+    /// Do we want to make this generic on the writer?
+    pub terminal:
         RefCell<AlternateScreen<MouseTerminal<RawTerminal<BufWriter<File>>>>>,
     current_style: Cell<theme::ColorPair>,
 
@@ -39,6 +39,8 @@ pub struct Backend {
 
     input_receiver: Receiver<TEvent>,
     resize_receiver: Receiver<()>,
+    /// .
+    pub locked: RefCell<bool>,
 }
 
 impl Backend {
@@ -112,11 +114,24 @@ impl Backend {
             last_button: None,
             input_receiver,
             resize_receiver,
+            locked: false.into()
         };
 
         Ok(Box::new(c))
     }
 
+    fn lock(&self) {
+        use std::time::*;
+        let mut locked = self.locked.borrow_mut();
+        if !*locked {
+            eprintln!("{} lock!", SystemTime::now()
+                .duration_since(UNIX_EPOCH)
+                .unwrap().as_millis());
+            self.terminal.borrow_mut().write_all(&[b'\x1b', b'\x50', b't', b'm', b'u', b'x', b';', b'\x1b', b'\x1b', b'\x50', b'=', b'1', b's', b'\x1b', b'\x1b', b'\x5c', b'\x1b', b'\\']).unwrap();
+            *locked = true;
+        }
+    }
+
     fn apply_colors(&self, colors: theme::ColorPair) {
         with_color(colors.front, |c| self.write(tcolor::Fg(c)));
         with_color(colors.back, |c| self.write(tcolor::Bg(c)));
@@ -225,6 +240,9 @@ impl Drop for Backend {
 }
 
 impl backend::Backend for Backend {
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
     fn name(&self) -> &str {
         "termion"
     }
@@ -241,6 +259,7 @@ impl backend::Backend for Backend {
     }
 
     fn set_effect(&self, effect: theme::Effect) {
+        self.lock();
         match effect {
             theme::Effect::Simple => (),
             theme::Effect::Reverse => self.write(tstyle::Invert),
@@ -253,6 +272,7 @@ impl backend::Backend for Backend {
     }
 
     fn unset_effect(&self, effect: theme::Effect) {
+        self.lock();
         match effect {
             theme::Effect::Simple => (),
             theme::Effect::Reverse => self.write(tstyle::NoInvert),
@@ -290,6 +310,7 @@ impl backend::Backend for Backend {
     }
 
     fn print_at(&self, pos: Vec2, text: &str) {
+        self.lock();
         write!(
             self.terminal.borrow_mut(),
             "{}{}",
@@ -300,6 +321,7 @@ impl backend::Backend for Backend {
     }
 
     fn print_at_rep(&self, pos: Vec2, repetitions: usize, text: &str) {
+        self.lock();
         if repetitions > 0 {
             let mut out = self.terminal.borrow_mut();
             write!(