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|
use crate::{buffer::Settings, Cell};
pub use direction::Direction;
pub use fragment::Fragment;
pub use fragment_tree::FragmentTree;
use itertools::Itertools;
use std::{
collections::BTreeMap,
ops::{Deref, DerefMut},
};
pub mod direction;
pub mod fragment;
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, Vec<Fragment>>);
impl Deref for FragmentBuffer {
type Target = BTreeMap<Cell, 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, shapes) in self.iter() {
buff.push_str(&format!("\ncell: {} ", cell));
for shape in shapes {
buff.push_str(&format!("\n {}", shape));
}
}
buff
}
/// Add a single fragment to this cell
pub fn add_fragment_to_cell(&mut self, cell: Cell, fragment: Fragment) {
if let Some(existing) = self.get_mut(&cell) {
existing.push(fragment);
} else {
self.insert(cell, vec![fragment]);
}
self.sort_fragments_in_cell(cell);
}
/// sort the fragments content in this cell
fn sort_fragments_in_cell(&mut self, cell: Cell) {
if let Some(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 multiple fragments to cell
pub fn add_fragments_to_cell(
&mut self,
cell: Cell,
fragments: Vec<Fragment>,
) {
if let Some(existing) = self.get_mut(&cell) {
existing.extend(fragments);
} else {
self.insert(cell, fragments);
}
self.sort_fragments_in_cell(cell);
}
pub fn merge_fragments(&self, settings: &Settings) -> Vec<Fragment> {
let fragments = self.first_pass_merge(settings);
Fragment::merge_recursive(fragments, settings)
}
/// merge fragments that can be merged.
/// This is only merging the fragments that are in the same
/// cell
fn first_pass_merge(&self, settings: &Settings) -> Vec<Fragment> {
let mut merged: Vec<Fragment> = vec![];
for (cell, fragments) in self.iter() {
for frag in fragments.iter() {
//Note: The fragments are calculated with their absolute
// parameters and is derived from the cell position
let abs_frag = frag.absolute_position(*cell);
let had_merged = merged.iter_mut().rev().any(|mfrag| {
if let Some(new_merge) = mfrag.merge(&abs_frag, settings) {
*mfrag = new_merge;
true
} else {
false
}
});
if !had_merged {
merged.push(abs_frag);
}
}
}
merged
}
}
|
