More improvements on the Architecture design

4 files changed, 119 insertions, 476 deletions

diff --git a/Architecture.md b/Architecture.md
index 9a182e3..950dcc3 100644
--- a/Architecture.md
+++ b/Architecture.md
@@ -1,5 +1,9 @@
 # Svgbob Architecture and Design phases
 
+Svgbob creates an svg drawing based on the input ascii art diagrams.
+It achieves this by creating a corresponding fragment for each character, and then this little fragments
+are then merged to form lines and arcs. The lines and arcs are then endorsed into high level shapes such as rect, circles.
+
 ## Name inspiration:
 - svg for svg document and drawing.
 - bob for Alice and Bob as common characters in most diagrams
@@ -491,6 +495,44 @@ Pros:
 
 PropertyBuffer is calculated only once for each character, so the succeeding lookup should not waste execution time to recompute.
 
+
+### How the fragments are conceived based on a character.
+
+### Neighbor character: There are 8 neighbors of a character and each character on the input is checked agains this 8 neighbor for appropriate drawing element
+```bob
++---------+  +-----+   +---------+
+|  TopLeft|  | Top |   | TopRight|
++---------+--+-----+---+---------+
+
++---------+  +------+  +--------+
+|  Left   |  |(char)|  | Right  |
++---------+  +------+  +--------+
+
++----------+ +------+  +-----------+
+|BottomLeft| |Bottom|  |BottomRight|
++----------+ +------+  +-----------+
+```
+
+### Character Grid: a 5x5 grid which covers the most significant points for a character to be converted into drawing elements.
+
+Character grid: / is the line connecting E to U. Dash is connecting K to O, etc.
+```bob
+
+  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
+
+```
+These fragments are processed such as merging collinear lines that are touching their endpoints.
+
 ```bob
 
 +--------------+        +------------+         +----------------+          +-----------------+
@@ -501,9 +543,9 @@ PropertyBuffer is calculated only once for each character, so the succeeding loo
                                 `-->| Spans |                                           /
                                     +-------+                                          /
                                       \                                               /
-                                       \    +---------------+    .---------------.   /
+                                       \    +---------------+    .----------------.  /
                                         `-->|Contact groups |---/ endorse shapes /--'
-                                            +---------------+   `---------------'
+                                            +---------------+  '----------------'
 ```
 
 - Optimizations.
diff --git a/Cargo.lock b/Cargo.lock
index e49388f..dd4f80e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -22,12 +22,6 @@ dependencies = [
 ]
 
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-checksum = "7825f6833612eb2414095684fcf6c635becf3ce97fe48cf6421321e93bfbd53c"
-
-[[package]]
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 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -66,12 +60,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -126,16 +114,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
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-checksum = "7c9c1ce3fa9336301af935ab852c437817d14cd33690446569392e65170aac3b"
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@@ -145,15 +123,6 @@ dependencies = [
 ]
 
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-checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -166,15 +135,6 @@ dependencies = [
 ]
 
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@@ -184,20 +144,6 @@ dependencies = [
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-checksum = "5ce65ac8028cf5a287a7dbf6c4e0a6cf2dcf022ed5b167a81bae66ebf599a8b7"
-dependencies = [
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- "mac",
- "markup5ever",
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "syn 0.15.44",
-]
-
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 name = "itertools"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -213,15 +159,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8b7a7c0c47db5545ed3fef7468ee7bb5b74691498139e4b3f6a20685dc6dd8e"
 
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@@ -258,29 +195,6 @@ dependencies = [
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@@ -296,12 +210,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
 
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@@ -338,22 +246,6 @@ dependencies = [
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@@ -416,110 +308,18 @@ dependencies = [
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@@ -804,39 +542,6 @@ dependencies = [
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-]
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- "quote 1.0.2",
- "syn 1.0.14",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
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- "sourcefile",
- "wasm-bindgen",
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diff --git a/svgbob/Cargo.toml b/svgbob/Cargo.toml
index a7f2dfc..7210f63 100644
--- a/svgbob/Cargo.toml
+++ b/svgbob/Cargo.toml
@@ -9,8 +9,7 @@ publish = false
 nalgebra = "0.18.0"
 ncollide2d = "0.19.1"
 lazy_static = "1.3.0"
-html5ever = "0.23.0"
-sauron = { version = "0.21.0"}
+sauron = { version = "0.21.0", default-features = false}
 unicode-width = "0.1.5"
 itertools = "0.8.0"
 pom = { version = "3.1.0" }
diff --git a/svgbob/src/buffer/cell_buffer.rs b/svgbob/src/buffer/cell_buffer.rs
index 55bb260..f60a79b 100644
--- a/svgbob/src/buffer/cell_buffer.rs
+++ b/svgbob/src/buffer/cell_buffer.rs
@@ -56,14 +56,18 @@ impl DerefMut for CellBuffer {
 
 impl CellBuffer {
     pub fn new() -> Self {
-        CellBuffer { map: BTreeMap::new(), css_styles: vec![] }
+        CellBuffer {
+            map: BTreeMap::new(),
+            css_styles: vec![],
+        }
     }
 
     pub fn add_css_styles(&mut self, css_styles: Vec<(String, String)>) {
         self.css_styles.extend(css_styles);
     }
 
-    /// Groups cell that are adjacents
+    /// Groups cell that are adjacents (cells that are next to each other, horizontally or
+    /// vertically)
     /// Note: using .rev() since this has a high change that the last cell is adjacent with the
     /// current cell tested
     pub fn group_adjacents(&self) -> Vec<Span> {
@@ -89,7 +93,11 @@ impl CellBuffer {
         let original_len = adjacents.len();
         let merged = Self::second_pass_merge(adjacents);
         // if has merged continue merging until nothing can be merged
-        if merged.len() < original_len { Self::merge_recursive(merged) } else { merged }
+        if merged.len() < original_len {
+            Self::merge_recursive(merged)
+        } else {
+            merged
+        }
     }
 
     /// second pass merge is operating on span comparing to other spans
@@ -144,17 +152,23 @@ impl CellBuffer {
         //
         // vec_groups are not endorsed, but are still touching, these will be grouped together in
         // the svg node
-        let (vec_fragments, vec_contacts): (Vec<Vec<Fragment>>, Vec<Vec<Contacts>>) =
-            self.group_adjacents().into_iter().map(|span| span.endorse()).unzip();
-
+        let (vec_fragments, vec_contacts): (Vec<Vec<Fragment>>, Vec<Vec<Contacts>>) = self
+            .group_adjacents()
+            .into_iter()
+            .map(|span| span.endorse())
+            .unzip();
 
         // partition the vec_groups into groups that is alone and the group
         // that is contacting their parts
-        let (single_member, vec_groups): (Vec<Contacts>, Vec<Contacts>) =
-            vec_contacts.into_iter().flatten().partition(move |contacts| contacts.0.len() == 1);
+        let (single_member, vec_groups): (Vec<Contacts>, Vec<Contacts>) = vec_contacts
+            .into_iter()
+            .flatten()
+            .partition(move |contacts| contacts.0.len() == 1);
 
-        let single_member_fragments: Vec<Fragment> =
-            single_member.into_iter().flat_map(|contact| contact.0).collect();
+        let single_member_fragments: Vec<Fragment> = single_member
+            .into_iter()
+            .flat_map(|contact| contact.0)
+            .collect();
 
         let group_nodes: Vec<Node<()>> = vec_groups
             .into_iter()
@@ -186,8 +200,10 @@ impl CellBuffer {
     }
 
     fn get_style(settings: &Settings, legend_css: String) -> Node<()> {
-        html::tags::style(vec![], vec![text(format!(
-            "line, path, circle,rect,polygon {{
+        html::tags::style(
+            vec![],
+            vec![text(format!(
+                "line, path, circle,rect,polygon {{
                           stroke: {stroke_color};
                           stroke-width: {stroke_width};
                           stroke-opacity: 1;
@@ -258,14 +274,15 @@ impl CellBuffer {
 
                          {legend_css}
                         ",
-            background = settings.background,
-            fill_color = settings.fill_color,
-            stroke_color = settings.stroke_color,
-            stroke_width = settings.stroke_width,
-            font_size = settings.font_size,
-            font_family = settings.font_family,
-            legend_css = legend_css,
-        ))])
+                background = settings.background,
+                fill_color = settings.fill_color,
+                stroke_color = settings.stroke_color,
+                stroke_width = settings.stroke_width,
+                font_size = settings.font_size,
+                font_family = settings.font_family,
+                legend_css = legend_css,
+            ))],
+        )
     }
 
     /// convert the fragments into svg nodes using the supplied settings, with size for the
@@ -277,28 +294,38 @@ impl CellBuffer {
         w: f32,
         h: f32,
     ) -> Node<()> {
-        let fragments_scaled: Vec<Fragment> =
-            fragments.into_iter().map(|frag| frag.scale(settings.scale)).collect();
+        let fragments_scaled: Vec<Fragment> = fragments
+            .into_iter()
+            .map(|frag| frag.scale(settings.scale))
+            .collect();
         let fragment_nodes: Vec<Node<()>> = FragmentTree::fragments_to_node(fragments_scaled);
 
-
-        let svg_node = svg(vec![xmlns("http://www.w3.org/2000/svg"), width(w), height(h)], vec![
-            Self::get_style(settings, legend_css),
-            Self::get_defs(),
-            rect(vec![class("backdrop"), x(0), y(0), width(w), height(h)], vec![]),
-        ])
+        let svg_node = svg(
+            vec![xmlns("http://www.w3.org/2000/svg"), width(w), height(h)],
+            vec![
+                Self::get_style(settings, legend_css),
+                Self::get_defs(),
+                rect(
+                    vec![class("backdrop"), x(0), y(0), width(w), height(h)],
+                    vec![],
+                ),
+            ],
+        )
         .add_children(fragment_nodes);
         svg_node
     }
 
     fn get_defs() -> Node<()> {
-        defs(vec![], vec![
-            Self::arrow_marker(),
-            Self::diamond_marker(),
-            Self::circle_marker(),
-            Self::open_circle_marker(),
-            Self::big_open_circle_marker(),
-        ])
+        defs(
+            vec![],
+            vec![
+                Self::arrow_marker(),
+                Self::diamond_marker(),
+                Self::circle_marker(),
+                Self::open_circle_marker(),
+                Self::big_open_circle_marker(),
+            ],
+        )
     }
 
     fn arrow_marker() -> Node<()> {
@@ -342,7 +369,10 @@ impl CellBuffer {
                 markerHeight(7),
                 orient("auto-start-reverse"),
             ],
-            vec![circle(vec![cx(4), cy(4), r(2), html::attributes::class("bg_filled")], vec![])],
+            vec![circle(
+                vec![cx(4), cy(4), r(2), html::attributes::class("bg_filled")],
+                vec![],
+            )],
         )
     }
 
@@ -357,7 +387,10 @@ impl CellBuffer {
                 markerHeight(7),
                 orient("auto-start-reverse"),
             ],
-            vec![circle(vec![cx(4), cy(4), r(2), html::attributes::class("filled")], vec![])],
+            vec![circle(
+                vec![cx(4), cy(4), r(2), html::attributes::class("filled")],
+                vec![],
+            )],
         )
     }
 
@@ -372,12 +405,14 @@ impl CellBuffer {
                 markerHeight(7),
                 orient("auto-start-reverse"),
             ],
-            vec![circle(vec![cx(4), cy(4), r(3), html::attributes::class("bg_filled")], vec![])],
+            vec![circle(
+                vec![cx(4), cy(4), r(3), html::attributes::class("bg_filled")],
+                vec![],
+            )],
         )
     }
 }
 
-
 impl fmt::Display for CellBuffer {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         writeln!(f, "CellBuffer dump..")?;
@@ -428,7 +463,6 @@ impl From<StringBuffer> for CellBuffer {
 mod tests {
     use super::*;
 
-
     #[test]
     fn test_simple_adjacents() {
         let art = r#"