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use crate::buffer::Span;
use crate::Cell;
use crate::Merge;
use crate::Settings;
pub use direction::Direction;
pub use fragment::Fragment;
pub use fragment_span::FragmentSpan;
pub use fragment_tree::FragmentTree;
use itertools::Itertools;
use std::{
collections::BTreeMap,
ops::{Deref, DerefMut},
};
pub mod direction;
pub mod fragment;
mod fragment_span;
mod fragment_tree;
/// Fragment buffer contains the drawing fragments for each cell
/// Svg can be converted to fragment buffer
/// then from the fragment we can match which characters is best suited for
/// a particular set of fragment contained in a cell and then create a stringbuffer.
/// The stringbuffer becomes the ascii diagrams
/// SVG -> FragmentBuffer -> StringBuffer -> Ascii Diagrams
///
/// We can also create a reverse
/// Ascii Diagrams -> String Buffer -> Fragment Buffer -> SVG
///
/// ```ignore
/// 0 1 2 3 4 B C D
/// 0┌─┬─┬─┬─┐ A┌─┬─┬─┬─┐E
/// 1├─┼─┼─┼─┤ │ │ │ │ │
/// 2├─┼─┼─┼─┤ F├─G─H─I─┤J
/// 3├─┼─┼─┼─┤ │ │ │ │ │
/// 4├─┼─┼─┼─┤ K├─L─M─N─┤O
/// 5├─┼─┼─┼─┤ │ │ │ │ │
/// 6├─┼─┼─┼─┤ P├─Q─R─S─┤T
/// 7├─┼─┼─┼─┤ │ │ │ │ │
/// 8└─┴─┴─┴─┘ U└─┴─┴─┴─┘Y
/// ``` V W X
#[derive(Debug)]
pub struct FragmentBuffer(BTreeMap<Cell, (char, Vec<Fragment>)>);
impl Deref for FragmentBuffer {
type Target = BTreeMap<Cell, (char, Vec<Fragment>)>;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl DerefMut for FragmentBuffer {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl FragmentBuffer {
pub fn new() -> Self {
FragmentBuffer(BTreeMap::new())
}
/// dump for debugging purpose only
/// printling the fragments on this fragment buffer
pub fn dump(&self) -> String {
let mut buff = String::new();
for (cell, (_ch, shapes)) in self.iter() {
buff.push_str(&format!("\ncell: {} ", cell));
for shape in shapes {
buff.push_str(&format!("\n {}", shape));
}
}
buff
}
/// sort the fragments content in this cell
fn sort_fragments_in_cell(&mut self, cell: Cell) {
if let Some((_ch, fragments)) = &mut self.get_mut(&cell) {
(*fragments).sort();
}
}
fn bounds(&self) -> Option<(Cell, Cell)> {
let xlimits =
self.iter().map(|(cell, _)| cell.x).minmax().into_option();
let ylimits =
self.iter().map(|(cell, _)| cell.y).minmax().into_option();
match (xlimits, ylimits) {
(Some((min_x, max_x)), Some((min_y, max_y))) => {
Some((Cell::new(min_x, min_y), Cell::new(max_x, max_y)))
}
_ => None,
}
}
pub fn get_size(&self, settings: &Settings) -> (f32, f32) {
let (_top_left, bottom_right) =
self.bounds().unwrap_or((Cell::new(0, 0), Cell::new(0, 0)));
let w = settings.scale * (bottom_right.x + 2) as f32 * Cell::width();
let h = settings.scale * (bottom_right.y + 2) as f32 * Cell::height();
(w, h)
}
/// Add a single fragment to this cell
pub fn add_fragment_to_cell(
&mut self,
cell: Cell,
ch: char,
fragment: Fragment,
) {
if let Some((ex_ch, existing)) = self.get_mut(&cell) {
assert_eq!(*ex_ch, ch);
existing.push(fragment);
} else {
self.insert(cell, (ch, vec![fragment]));
}
self.sort_fragments_in_cell(cell);
}
/// add multiple fragments to cell
pub fn add_fragments_to_cell(
&mut self,
cell: Cell,
ch: char,
fragments: Vec<Fragment>,
) {
if let Some((ex_ch, existing)) = self.get_mut(&cell) {
assert_eq!(*ex_ch, ch);
existing.extend(fragments);
} else {
self.insert(cell, (ch, fragments));
}
self.sort_fragments_in_cell(cell);
}
pub fn merge_fragment_spans(
&self,
settings: &Settings,
) -> Vec<FragmentSpan> {
let fragment_spans = self.into_fragment_spans();
FragmentSpan::merge_recursive(fragment_spans)
}
/// create a merged of fragments while preserving their cells
fn into_fragment_spans(&self) -> Vec<FragmentSpan> {
let mut fragment_spans: Vec<FragmentSpan> = vec![];
for (cell, (ch, fragments)) in self.iter() {
for frag in fragments.iter() {
let abs_frag = frag.absolute_position(*cell);
let span = Span::new(*cell, *ch);
let abs_frag = FragmentSpan::new(span, abs_frag);
let had_merged =
fragment_spans.iter_mut().rev().any(|frag_span| {
if let Some(new_merge) = frag_span.merge(&abs_frag) {
*frag_span = new_merge;
true
} else {
false
}
});
if !had_merged {
fragment_spans.push(abs_frag);
}
}
}
fragment_spans
}
}
|
