create basic modification of arranger

example/ex1.ug

@@ -1,8 +1,7 @@
 {@lang|en}
 {@def|@font|{@quote|FreeSans|AR PL UKai TW}}
 {@def|@fontsize|12}
-therapy of communication and pronounciation123%comment
-
-anotherline%{@set|@fontsize|10} processing
-
-of the problem
+{@def|@linewidth|200} %in px%
+{@def|@spacing|{@hglue|{@ex|1}|2}}
+{@def|@cjk_spacing|{@hglue|{@ex|0}|0.001}}
+11111 222 3333333 444444 555555 666666 77777 88888 99999 000000 11111 22222 33333 55555

example/ex2.ug

@@ -0,0 +1,11 @@
+{@lang|en}
+{@def|@font|{@quote|FreeSans|AR PL UKai TW}}
+{@def|@fontsize|12}
+{@def|@linewidth|300} %in px%
+{@def|@spacing|{@hglue|{@ex|1}|2}}
+{@def|@cjk_spacing|{@hglue|{@ex|0}|0.001}}
+therapy of communication and pronounciation123%comment
+
+anotherline%{@set|@fontsize|10} processing of
+
+of the problem

src/arrange.jl

@@ -0,0 +1,37 @@
+module Arrange
+using Match
+
+u = Main.uahgi
+
+# the cost of make ith to jth char a line
+function cost(items, i, j, linewidth)
+    slice = items[i:j]
+    cost_list = map(x -> item_cost(x), slice)
+    sum_of_cost_list = reduce((x, y)-> x+y, cost_list)
+    if sum_of_cost_list > linewidth
+        return Inf
+    else
+        return linewidth - sum_of_cost_list
+    end
+end
+
+function item_cost(i)
+    if typeof(i) == u.HGlue
+        return i.wd
+    elseif typeof(i) == u.ChBox
+        return i.wd
+    else
+        return 0
+    end
+end
+
+function arrange(vbox, env)
+    result_vbox_inner = []
+    linewidth = parse(Int, env["linewidth"])
+    print(cost(vbox.eles[1].eles, 1, 20, linewidth))
+
+    return vbox
+
+end
+
+end

src/interp.jl

@@ -8,6 +8,12 @@ using .PDFOperating
 u = Main.uahgi
 c = Main.uahgi.Parsing.Passes.Classes
 
+@enum PutChar begin
+    true_ = 0
+    false_ = 1
+    gen_chbox_ = 2
+end
+
 function interp_main(ast, env, res_box)
     ast_inner = ast.val
     val = nothing
@@ -22,17 +28,33 @@ interp: the intepreter of the uahgi.
 - ast: element or part of the ast
 - env: the variable storaging environment 
 - res_box: the generated result box containing the content\
-- put_char(bool. value): if the character should be put into the res_box
+- put_char(PutChar): if the character should be put into the res_box. 
 """
-function interp(ast, env, res_box, put_char=true)
+function interp(ast, env, res_box, put_char=true_)
     #println("INTERP", ast)
     @match ast begin
         c.SEQ([c.ELE([c.ID("def")]),
             c.ELE([c.ID(id)]),val]) => 
                         begin
-                            (val_evaled, env, res_box) = interp(val, env, res_box, false)
+                            (val_evaled, env, res_box) = interp(val, env, res_box, false_)
                             #println("ID~~~", id, " VAL~~~", val_evaled)
+                            if !haskey(env, id)
                                 env[id] = val_evaled
+                            else
+                                throw("the variable $id has been defined.")
+                            end
+                            return (val_evaled, env, res_box)
+                        end
+        c.SEQ([c.ELE([c.ID("set")]),
+            c.ELE([c.ID(id)]),val]) => 
+                    begin
+                        (val_evaled, env, res_box) = interp(val, env, res_box, false_)
+                        #println("ID~~~", id, " VAL~~~", val_evaled)
+                        if haskey(env, id)
+                            env[id] = val_evaled
+                        else
+                            throw("the variable $id is not defined yet.")
+                        end
                         return (val_evaled, env, res_box)
                                     end
         c.SEQ([c.ELE([c.ID("quote")]),
@@ -45,49 +67,107 @@ function interp(ast, env, res_box, put_char=true)
         
         c.ELE([v...]) =>   begin
                             ele = reduce( (x, y) -> x*""*y,
-                                map(i -> interp(i, env, res_box, false)[1], v))
+                                map(i -> interp(i, env, res_box, false_)[1], v))
                             return (ele, env, res_box)
             
                         end
+        c.SEQ([c.ELE([c.ID("par")])]) =>begin
+                                            push!(res_box.eles, u.HBox([],
+                                             nothing, nothing, nothing, nothing, nothing))
+                                            return (ast, env, res_box)
+                                        end
+        c.SEQ([c.ELE([c.ID("ex")]), val]) =>begin
+                                        x = 'x'
+                                        font_family = select_font(x, env)
+                                        font_path = get_font_path(font_family)
+                                        font_size = parse(Int, env["fontsize"])
+                                        charmetrics = PDFOperating.check_char_size(
+                                            'x',
+                                            font_path,
+                                            font_size)
+                                        ex_in_px = charmetrics.wd
+                                        (val, _, _) = interp(val, env, res_box, false_)
+                                        val_ex_in_px = ex_in_px * parse(Int,val)
+                                        return (val_ex_in_px, env, res_box)
+                                    end
+        c.SEQ([c.ELE([c.ID("hglue")]),
+            width,stretch]) => begin
+                                    if put_char == true_
+                                        (width_evaled, _, _) = interp(width, env, res_box, false_)
+                                        (stretch_evaled, _, _) = interp(stretch, env, res_box, false_)
+                                        push!(res_box.eles[end].eles,
+                                            u.HGlue(width_evaled, parse(Int, stretch_evaled))
+                                        )
+                                    end
+
+                                    return (ast, env, res_box)
+                                end
+
         c.CHAR(ch) => begin
                         atomic_ch = ch[1]
 
-                        if put_char == true
-
-                            font_idx = 1
-                            font_family = string(env["font"][font_idx])
-                            font_family_length = length(font_family)
-                            while !is_in_font(atomic_ch, font_family)
-                                if font_idx <= font_family_length
-                                    font_idx += 1
-                                    font_family = string(env["font"][font_idx])
-                                else
-                                    font_list = string(env["font"])
-                                    throw("the chars $atomic_ch is not contained in all the fonts
-                                        listed in listed fonts: $font_list")
-                                end
+                        if put_char == false_
+                            return (ch, env, res_box)
                         end
 
+                        font_family = select_font(atomic_ch, env)
 
                         font_path = get_font_path(font_family)
                         font_size = parse(Int, env["fontsize"])
                         glyph_metrics = PDFOperating.check_char_size(
                                             atomic_ch, font_path, font_size)
-
-
-                            push!(res_box.eles[end].eles,
-                                u.ChBox(ch,
+                        chbox = u.ChBox(ch,
                             font_path,
                             font_size,
                             glyph_metrics.ht,
                             glyph_metrics.dp,
-                                    glyph_metrics.wd))
-                        end
-                            return (ch, env, res_box)
-                    end
-        c.NL(nl) => return (nl, env, res_box)
-        c.SPACE(sp) => return (sp, env, res_box)
+                            glyph_metrics.wd,
+                            nothing, nothing)
                         
+                        if put_char == true_
+                            push!(res_box.eles[end].eles, chbox)
+                            return (ch, env, res_box)
+                        else # put_char == gen_chbox_
+                            return (chbox, env, res_box)
+                        
+                        end
+                    end
+
+        c.SEQ([c.ELE([c.ID("disc")]),
+                c.ELE(before),
+                c.ELE(after),
+                c.ELE(orig)])=> begin
+                before_item = length(before) == 0 ? [] : before[1]
+                after_item = length(after) == 0 ? [] : after[1]
+                orig_item = length(orig) == 0 ? [] : orig[1]
+
+                (before_evaled, _, _) = interp(before_item, env, res_box, gen_chbox_)
+                (after_evaled, _, _) = interp(after_item, env, res_box, gen_chbox_)
+                (orig_evaled, _, _) = interp(orig_item, env, res_box, gen_chbox_)
+                ret = u.Disc(before_evaled, after_evaled, orig_evaled)
+                println("RETURN", ret)
+                push!(res_box.eles[end].eles, ret)
+                return (ret, env, res_box)
+            
+            end
+        c.NL(nl) => begin
+                        #if spacing defined
+                        if haskey(env, "spacing")
+                            (spacing, _, _) = interp(env["spacing"], env, res_box, false_)
+                            add_spacing = interp(spacing, env, res_box, true_)
+                        end
+                        return (nl, env, res_box)
+                    end
+        c.SPACE(sp) => begin
+                            #if spacing defined
+                            if haskey(env, "spacing")
+                                (spacing, _, _) = interp(env["spacing"], env, res_box, false_)
+                                add_spacing = interp(spacing, env, res_box, true_)
+                            end
+                            return (sp, env, res_box)
+                        end
+        # empty item
+        [] => return (ast, env, res_box)
         _ => begin
               println("不知道")
               val_evaled = "不知道"
@@ -144,6 +224,24 @@ function padding_zero(i)
     return i
 end
 
-
+"""
+Select proper font having the glyph of char `ch`
+"""
+function select_font(ch, env)
+    font_idx = 1
+    font_family = string(env["font"][font_idx])
+    font_family_length = length(font_family)
+    while !is_in_font(ch, font_family)
+        if font_idx <= font_family_length
+            font_idx += 1
+            font_family = string(env["font"][font_idx])
+        else
+            font_list = string(env["font"])
+            throw("the chars $atomic_ch is not contained in all the fonts
+                listed in listed fonts: $font_list")
+        end
+    end
+    return font_family
+end
 
 end

src/parsing.jl

@@ -15,7 +15,7 @@ grammar rules of uahgi
 
 comment = P"\%[^%]+\%"
 newline = P"(\r?\n)" |> Passes.Classes.NL
-space = p"[ \t]" > Passes.Classes.SPACE
+space = p"[ \t]+" > Passes.Classes.SPACE
 
 id_name = p"[_a-zA-Z][_0-9a-zA-Z]*" > Passes.Classes.ID
 id = E"@" + id_name
@@ -139,10 +139,4 @@ function ast_to_string(ast)
     return str
 end
 
-# Write your package code here.
-#export cat
-
-#cat = 1.2
-
-
 end

src/passes.jl

@@ -26,8 +26,7 @@ push!(processed_passes, two_nl_to_par_pass)
 
 # in 2 hanzi add glue.
 function insert_hglue_in_adjacent_chinese(two_nl)
-    _0pt = Classes.SEQ([Classes.ID("pt"); Classes.CHAR(["0"])])
-    inner = Classes.SEQ([Classes.ID("hglue"); _0pt])
+    inner = Classes.ID("cjk_spacing")
     return [two_nl[1]; inner; two_nl[2]]
 end
 adjacent_chinese_pattern = [Classes.CHAR(r"[\p{Han}，。！？：「」『』…]"),

src/uahgi.jl

@@ -1,11 +1,28 @@
 module uahgi
 include("parsing.jl")
 include("interp.jl")
+include("arrange.jl")
+
 using .Interp
 using .Parsing
+using .Arrange
 using ArgParse
 
+export ChBox, HGlue
 abstract type Box end
+
+"""
+a like-breakable discrete point.
+- before: the item before likebreaking
+- after: the item after linebreaking
+- orig: the status while not triggering like breaking
+"""
+mutable struct Disc<:Box
+    before
+    after
+    orig
+end
+
 """
 Horizonal Box
 
@@ -19,8 +36,21 @@ mutable struct HBox<:Box
     ht
     dp
     wd
+    x
+    y
 end
 
+"""
+Horizonal Glue (HGlue)
+- wd: width
+- str : stretch
+"""
+mutable struct HGlue<:Box
+    wd
+    str
+end
+
+
 """
 Vertical Box
 
@@ -34,6 +64,8 @@ mutable struct VBox<:Box
     ht
     dp
     wd
+    x
+    y
 end
 
 """
@@ -53,6 +85,8 @@ mutable struct ChBox<:Box
     ht
     dp
     wd
+    x
+    y
 end
 
 function parse_commandline()
@@ -64,7 +98,7 @@ function parse_commandline()
     @add_arg_table! s begin
         "FILE"
             help = "the file path to be converted."
-            required = true
+            required = false
     end
 
     return parse_args(s)
@@ -74,6 +108,18 @@ end
 function main()
     parsed_args = parse_commandline()
     file_path = parsed_args["FILE"]
+    if file_path === nothing
+    #help string
+    help = "usage: uahgi.jl [-h] [FILE]
+
+    positional arguments:
+      FILE        the file path to be converted.
+    
+    optional arguments:
+      -h, --help  show this help message and exit"
+        println(help)
+        return 0
+    end
     # for test
     #if parsed_args["FILE"] === nothing
     #    file_path = "./example/ex1.ug"
@@ -85,11 +131,16 @@ function main()
 
 
     default_env = Dict() # the default environment for the intepreter
-    output_box_orig = VBox([HBox([], nothing, nothing, nothing)],
-                          nothing, nothing, nothing)
+    output_box_orig = VBox([HBox([], nothing, nothing, nothing, nothing, nothing)],
+                          nothing, nothing, nothing, nothing, nothing)
     output_box_result = Interp.interp_main(ast, default_env, output_box_orig)
-    print("Env", output_box_result[2])
-    print("OutPutBox", output_box_result[3])
+    env = output_box_result[2]
+    output_box =  output_box_result[3]
+    print(output_box)
+    #TODO
+    arranged = Arrange.arrange(output_box, env)
+
+
 
 end