diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/luatex/generic/luatexja/src/ltj-adjust.lua |
Initial commit
Diffstat (limited to 'macros/luatex/generic/luatexja/src/ltj-adjust.lua')
-rw-r--r-- | macros/luatex/generic/luatexja/src/ltj-adjust.lua | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/macros/luatex/generic/luatexja/src/ltj-adjust.lua b/macros/luatex/generic/luatexja/src/ltj-adjust.lua new file mode 100644 index 0000000000..3d7e31e0c4 --- /dev/null +++ b/macros/luatex/generic/luatexja/src/ltj-adjust.lua @@ -0,0 +1,551 @@ +-- +-- ltj-adjust.lua +-- +luatexja.load_module('base'); local ltjb = luatexja.base +luatexja.load_module('jfont'); local ltjf = luatexja.jfont +luatexja.load_module('jfmglue'); local ltjj = luatexja.jfmglue +luatexja.load_module('stack'); local ltjs = luatexja.stack +luatexja.load_module('direction'); local ltjd = luatexja.direction +luatexja.load_module('lineskip'); local ltjl = luatexja.lineskip +luatexja.adjust = luatexja.adjust or {} + +local to_node = node.direct.tonode +local to_direct = node.direct.todirect + +local setfield = node.direct.setfield +local setglue = luatexja.setglue +local getfield = node.direct.getfield +local getlist = node.direct.getlist +local getid = node.direct.getid +local getfont = node.direct.getfont +local getsubtype = node.direct.getsubtype + +local node_traverse_id = node.direct.traverse_id +local node_new = node.direct.new +local node_next = node.direct.getnext +local node_free = node.direct.free +local node_prev = node.direct.getprev +local node_tail = node.direct.tail +local has_attr = node.direct.has_attribute +local set_attr = node.direct.set_attribute +local insert_after = node.direct.insert_after + +local id_glyph = node.id('glyph') +local id_kern = node.id('kern') +local id_hlist = node.id('hlist') +local id_glue = node.id('glue') +local id_whatsit = node.id('whatsit') +local id_penalty = node.id('penalty') +local attr_icflag = luatexbase.attributes['ltj@icflag'] +local attr_jchar_class = luatexbase.attributes['ltj@charclass'] +local lang_ja = luatexja.lang_ja + +local ltjf_font_metric_table = ltjf.font_metric_table +local ipairs, pairs = ipairs, pairs + +local PACKED = luatexja.icflag_table.PACKED +local LINEEND = luatexja.icflag_table.LINEEND +local FROM_JFM = luatexja.icflag_table.FROM_JFM +local KANJI_SKIP = luatexja.icflag_table.KANJI_SKIP +local KANJI_SKIP_JFM = luatexja.icflag_table.KANJI_SKIP_JFM +local XKANJI_SKIP = luatexja.icflag_table.XKANJI_SKIP +local XKANJI_SKIP_JFM = luatexja.icflag_table.XKANJI_SKIP_JFM + +local get_attr_icflag +do + local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG + get_attr_icflag = function(p) + return (has_attr(p, attr_icflag) or 0) % PROCESSED_BEGIN_FLAG + end +end + +local priority_num = { 0, 0 } +local at2pr = { {}, {} } +local at2pr_st, at2pr_sh = at2pr[1], at2pr[2] +do + local priority_table = {{},{}} + luatexja.adjust.priority_table = priority_table + local tmp = {} + local function cmp(a,b) return a[1]>b[1] end -- 大きいほうが先! + local function make_priority_table(glue_sign) + for i,_ in pairs(tmp) do tmp[i]=nil end + if glue_sign==2 then -- shrink + for i=0,63 do tmp[#tmp+1] = { (i%8)-4, FROM_JFM+i } end + else -- stretch + for i=0,63 do tmp[#tmp+1] = { math.floor(i/8)-4, FROM_JFM+i } end + end + local pt = priority_table[glue_sign] + tmp[#tmp+1] = { pt[2]/10, XKANJI_SKIP } + tmp[#tmp+1] = { pt[2]/10, XKANJI_SKIP_JFM } + tmp[#tmp+1] = { pt[1]/10, KANJI_SKIP } + tmp[#tmp+1] = { pt[1]/10, KANJI_SKIP_JFM } + tmp[#tmp+1] = { pt[3]/10, -1 } + table.sort(tmp, cmp) + local a, m, n = at2pr[glue_sign], 10000000, 0 + for i=1,#tmp do + if tmp[i][1]<m then n,m = n+1,tmp[i][1] end + a[tmp[i][2]] = n + end + local o = a[-1] + priority_num[glue_sign] = n + setmetatable(a, {__index = function () return o end }) + end + luatexja.adjust.make_priority_table = make_priority_table +end + +-- box 内で伸縮された glue の合計値を計算 + +local total_stsh = {{},{}} +local total_st, total_sh = total_stsh[1], total_stsh[2] +local get_total_stretched +do +local dimensions = node.direct.dimensions +function get_total_stretched(p) +-- return value: <補正値(sp)> + local ph = getlist(p) + if not ph then return 0 end + for i,_ in pairs(total_st) do total_st[i]=nil; total_sh[i]=nil end + for i=1,priority_num[1] do total_st[i]=0 end + for i=1,priority_num[2] do total_sh[i]=0 end + for i=0,4 do total_st[i*65536]=0; total_sh[i*65536]=0 end + for q in node_traverse_id(id_glue, ph) do + local a = getfield(q, 'stretch_order') + if a==0 then + local b = at2pr_st[get_attr_icflag(q)]; + total_st[b] = total_st[b]+getfield(q, 'stretch') + end + total_st[a*65536] = total_st[a]+getfield(q, 'stretch') + local a = getfield(q, 'shrink_order') + if a==0 then + local b = at2pr_sh[get_attr_icflag(q)]; + total_sh[b] = total_sh[b]+getfield(q, 'shrink') + end + total_sh[a*65536] = total_sh[a]+getfield(q, 'shrink') + end + for i=4,1,-1 do if total_st[i*65536]~=0 then total_st.order=i; break end; end + if not total_st.order then + total_st.order, total_st[-65536] = -1,0.1 -- dummy + end + for i=4,1,-1 do if total_sh[i*65536]~=0 then total_sh.order=i; break end; end + if not total_sh.order then + total_sh.order, total_sh[-65536] = -1,0.1 -- dummy + end + return getfield(p,'width') - dimensions(ph) +end +end + +-- step 1: 行末に kern を挿入(句読点,中点用) +local abs = math.abs +local ltjd_glyph_from_packed = ltjd.glyph_from_packed +local function aw_step1(p, total) + local head = getlist(p) + local x = node_tail(head); if not x then return total, false end + -- x: \rightskip + x = node_prev(x); if not x then return total, false end + local xi, xc = getid(x) + -- x may be penalty + while xi==id_penalty do + x = node_prev(x); if not x then return total, false end + xi = getid(x) + end + if (total>0 and total_st.order>0) or (total<0 and total_sh.order>0) then + -- 無限大のグルーで処理が行われているときは処理中止. + return total, false + end + if xi == id_glyph and getfield(x, 'lang')==lang_ja then + -- 和文文字 + xc = x + elseif xi == id_hlist and get_attr_icflag(x) == PACKED then + -- packed JAchar + xc = ltjd_glyph_from_packed(x) + while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために? + else + return total, false-- それ以外は対象外. + end + local eadt = ltjf_font_metric_table[getfont(xc)] + .char_type[has_attr(xc, attr_jchar_class) or 0].end_adjust + if not eadt then + return total, false + end + local eadt_ratio = {} + for i, v in ipairs(eadt) do + local t = total - v + if t>0 then + eadt_ratio[i] = {i, t/total_st[65536*total_st.order], t, v} + else + eadt_ratio[i] = {i, t/total_sh[65536*total_sh.order], t, v} + end + end + table.sort(eadt_ratio, + function (a,b) + for i=2,4 do + local at, bt = abs(a[i]), abs(b[i]) + if at~=bt then return at<bt end + end + return a[4]<b[4] + end) + if eadt[eadt_ratio[1][1]]~=0 then + local kn = node_new(id_kern, 1) + setfield(kn, 'kern', eadt[eadt_ratio[1][1]]); set_attr(kn, attr_icflag, LINEEND) + insert_after(head, x, kn) + return eadt_ratio[1][3], true + else + return total, false + end +end + +-- step 1 最終行用 +local min, max = math.min, math.max +local function aw_step1_last(p, total) + local head = getlist(p) + local x = node_tail(head); if not x then return total, false end + -- x: \rightskip + pf = node_prev(x); if not x then return total, false end + if getid(pf) ~= id_glue or getsubtype(pf) ~= 15 then return total, false end + x = node_prev(node_prev(pf)); xi = getid(x) + local xi, xc = getid(x) + if xi == id_glyph and getfield(x, 'lang')==lang_ja then + -- 和文文字 + xc = x + elseif xi == id_hlist and get_attr_icflag(x) == PACKED then + -- packed JAchar + xc = ltjd_glyph_from_packed(x) + while getid(xc) == id_whatsit do xc = node_next(xc) end -- これはなんのために? + else + return total, false-- それ以外は対象外. + end + -- 続行条件1:無限の伸縮度を持つグルーは \parfillskipのみ + if total>0 and total_st.order>0 then + if total_st.order ~= getfield(pf, 'stretch_order') then return total, false end + if total_st[total_st.order*65536] ~= getfield(pf, 'stretch') then return total, false end + for i=total_st.order-1, 1, -1 do + if total_st[i*65536] ~= 0 then return total, false end + end + end + if total<0 and total_sh.order>0 then + if total_sh.order ~= getfield(pf, 'shrink_order') then return total, false end + if total_sh[total_sh.order*65536] ~= getfield(pf, 'shrink') then return total, false end + for i=total_sh.order-1, 1, -1 do + if total_sh[i*65536] ~= 0 then return total, false end + end + end + local eadt = ltjf_font_metric_table[getfont(xc)] + .char_type[has_attr(xc, attr_jchar_class) or 0].end_adjust + if not eadt then + return total, false + end + -- 続行条件2: min(eadt[1], 0)<= \parfillskip <= max(eadt[#eadt], 0) + local pfw = getfield(pf, 'width') + + (total>0 and getfield(pf, 'stretch') or -getfield(pf, 'shrink')) *getfield(p, 'glue_set') + if pfw<min(0,eadt[1]) or max(0,eadt[#eadt])<pfw then return total, false end + -- \parfillskip を 0 にする + total = total + getfield(pf, 'width') + total_st.order, total_sh.order = 0, 0 + if getfield(pf, 'stretch_order')==0 then + local i = at2pr_st[-1] + total_st[0] = total_st[0] - getfield(pf, 'stretch') + total_st[i] = total_st[i] - getfield(pf, 'stretch') + total_st.order = (total_st[0]==0) and -1 or 0 + end + if getfield(pf, 'shrink_order')==0 then + local i = at2pr_sh[-1] + total_sh[0] = total_sh[0] - getfield(pf, 'shrink') + total_sh[i] = total_sh[i] - getfield(pf, 'shrink') + total_sh.order = (total_sh[0]==0) and -1 or 0 + end + setfield(pf, 'subtype', 1); setglue(pf) + local eadt_ratio = {} + for i, v in ipairs(eadt) do + local t = total - v + if t>0 then + eadt_ratio[i] = {i, t/total_st[65536*total_st.order], t, v} + else + eadt_ratio[i] = {i, t/total_sh[65536*total_sh.order], t, v} + end + end + table.sort(eadt_ratio, + function (a,b) + for i=2,4 do + local at, bt = abs(a[i]), abs(b[i]) + if at~=bt then return at<bt end + end + return a[4]<b[4] + end) + if eadt[eadt_ratio[1][1]]~=0 then + local kn = node_new(id_kern, 1) + setfield(kn, 'kern', eadt[eadt_ratio[1][1]]); set_attr(kn, attr_icflag, LINEEND) + insert_after(head, x, kn) + return eadt_ratio[1][3], true + else + return total, false + end +end + + +-- step 2: 行中の glue を変える +local aw_step2, aw_step2_dummy +do +local node_hpack = node.direct.hpack +local function repack(p) + local f = node_hpack(getlist(p), getfield(p, 'width'), 'exactly') + setfield(f, 'head', nil) + setfield(p, 'glue_set', getfield(f, 'glue_set')) + setfield(p, 'glue_order', getfield(f, 'glue_order')) + setfield(p, 'glue_sign', getfield(f, 'glue_sign')) + node_free(f) + return +end +function aw_step2_dummy(p, _, added_flag) + if added_flag then return repack(p) end +end + +local function clear_stretch(p, ind, ap, name) + for q in node_traverse_id(id_glue, getlist(p)) do + local f = ap[get_attr_icflag(q)] + if f == ind then + setfield(q, name..'_order', 0) + setfield(q, name, 0) + end + end +end + +local function set_stretch(p, after, before, ind, ap, name) + if before > 0 then + local ratio = after/before + for q in node_traverse_id(id_glue, getlist(p)) do + local f = ap[get_attr_icflag(q)] + if (f==ind) and getfield(q, name..'_order')==0 then + setfield(q, name, getfield(q, name)*ratio) + end + end + end +end + +function aw_step2(p, total, added_flag) + local name = (total>0) and 'stretch' or 'shrink' + local id = (total>0) and 1 or 2 + local res = total_stsh[id] + local pnum = priority_num[id] + if total==0 or res.order > 0 then + -- もともと伸縮の必要なしか,残りの伸縮量は無限大 + if added_flag then return repack(p) end + end + total = abs(total) + for i = 1, pnum do + if total <= res[i] then + local a = at2pr[id] + for j = i+1,pnum do + clear_stretch(p, j, a, name) + end + set_stretch(p, total, res[i], i, a, name); break + end + total = total - res[i] + end + return repack(p) +end +end + +-- step 1': lineend=extended の場合(行分割時に考慮)) +local insert_lineend_kern +do + local insert_before = node.direct.insert_before + local KINSOKU = luatexja.icflag_table.KINSOKU + function insert_lineend_kern(head, nq, np, Bp) + if nq.met then + local eadt = nq.met.char_type[nq.class].end_adjust + if not eadt then return end + if eadt[1]~=0 then + local x = node_new(id_kern, 1) + setfield(x, 'kern', eadt[1]); set_attr(x, attr_icflag, LINEEND) + insert_before(head, np.first, x) + end + local eadt_num = #eadt + for i=2,eadt_num do + local x = node_new(id_penalty) + setfield(x, 'penalty', 0); set_attr(x, attr_icflag, KINSOKU) + insert_before(head, np.first, x); Bp[#Bp+1] = x + local x = node_new(id_kern, 1) + setfield(x, 'kern', eadt[i]-eadt[i-1]); set_attr(x, attr_icflag, LINEEND) + insert_before(head, np.first, x) + end + if eadt_num>1 or eadt[1]~=0 then + local x = node_new(id_penalty) + setfield(x, 'penalty', 0); set_attr(x, attr_icflag, KINSOKU) + insert_before(head, np.first, x); Bp[#Bp+1] = x + local x = node_new(id_kern, 1) + setfield(x, 'kern', -eadt[eadt_num]); set_attr(x, attr_icflag, LINEEND) + insert_before(head, np.first, x) + local x = node_new(id_penalty) + setfield(x, 'penalty', 10000); set_attr(x, attr_icflag, KINSOKU) + insert_before(head, np.first, x); Bp[#Bp+1] = x + end + end + end +end + +local adjust_width +do + local myaw_atep1, myaw_step2, myaw_step1_last + local dummy = function(p,t,n) return t, false end + local ltjs_fast_get_stack_skip = ltjs.fast_get_stack_skip + function adjust_width(head) + if not head then return head end + local last_p + for p in node_traverse_id(id_hlist, to_direct(head)) do + if last_p then + myaw_step2(last_p, myaw_step1(last_p, get_total_stretched(last_p))) + end + last_p = p + end + if last_p then + myaw_step2(last_p, myaw_step1_last(last_p, get_total_stretched(last_p))) + end + return to_node(head) + end + local is_reg = false + function enable_cb(status_le, status_pr, status_lp, status_ls) + if (status_le>0 or status_pr>0) and (not is_reg) then + ltjb.add_to_callback('post_linebreak_filter', + adjust_width, 'Adjust width', + luatexbase.priority_in_callback('post_linebreak_filter', 'ltj.lineskip')-1) + is_reg = true + elseif is_reg and (status_le==0 and status_pr==0) then + luatexbase.remove_from_callback('post_linebreak_filter', 'Adjust width') + is_reg = false + end + if status_le==2 then + if not luatexbase.in_callback('luatexja.adjust_jfmglue', 'luatexja.adjust') then + ltjb.add_to_callback('luatexja.adjust_jfmglue', insert_lineend_kern, 'luatexja.adjust') + end + myaw_step1, myaw_step1_last = dummy, aw_step1_last + else + if status_le==0 then + myaw_step1, myaw_step1_last = dummy, dummy + else + myaw_step1, myaw_step1_last = aw_step1, aw_step1_last + end + if luatexbase.in_callback('luatexja.adjust_jfmglue', 'luatexja.adjust') then + luatexbase.remove_from_callback('luatexja.adjust_jfmglue', 'luatexja.adjust') + end + end + myaw_step2 = (status_pr>0) and aw_step2 or aw_step2_dummy + luatexja.lineskip.setting( + status_lp>0 and 'profile' or 'dummy', + status_ls>0 and 'step' or 'dummy' + ) + end + function disable_cb() -- only for compatibility + enable_cs(0,0,0,0) + end + luatexja.adjust.enable_cb=enable_cb + luatexja.adjust.disable_cb=disable_cb +end + +luatexja.unary_pars.adjust = function(t) + return is_reg and 1 or 0 +end + +-- ---------------------------------- +do + local max, ins, sort = math.max, table.insert, table.sort + local function insert(package, ind, d, b, e) + local bound = package[2] + bound[b], bound[e]=true, true + ins(package[1], {b,e,[ind]=d}) + end + local function flatten(package) + local bd={} for i,_ in pairs(package[2]) do ins(bd,{i}) end + sort(bd, function (a,b) return a[1]<b[1] end) + local bdc=#bd; local t = package[1] + sort(t, function (a,b) return a[1]<b[1] end) + local bdi =1 + for i=1,#t do + while bd[bdi][1]<t[i][1] do bdi=bdi+1 end + local j = bdi + while j<bdc and bd[j+1][1]<=t[i][2] do + for k,w in pairs(t[i]) do + if k>=3 then + bd[j][k]=bd[j][k] and max(bd[j][k],w) or w + end + end + j=j+1 + end + end + package[2]=nil; package[1]=nil; package.flatten, package.insert=nil, nil + bd[#bd]=nil + return bd + end + function init_range() + return {{},{}, insert=insert, flatten=flatten} + end +end + +-- ----------------------------------- +luatexja.adjust.step_factor = 0.5 +luatexja.unary_pars.linestep_factor = function(t) + return luatexja.adjust.step_factor +end +luatexja.adjust.profile_hgap_factor = 1 +luatexja.unary_pars.profile_hgap_factor = function(t) + return luatexja.adjust.profile_hgap_factor +end +do + local insert = table.insert + local rangedimensions, max = node.direct.rangedimensions, math.max + local function profile_inner(box, range, ind, vmirrored, adj) + local w_acc, d_before = getfield(box,'shift'), 0 + local x = getlist(box); local xn = node_next(x) + while x do + local w, h, d + if xn then w, h, d= rangedimensions(box,x,xn) + else w, h, d= rangedimensions(box,x) end + if vmirrored then h=d end + local w_new = w_acc + w + if w>=0 then + range:insert(ind, h, w_acc-adj, w_new) + else + range:insert(ind, h, w_new-adj, w_acc) + end + w_acc = w_new; x = xn; if x then xn = node_next(x) end + end + end + function ltjl.p_profile(before, after, mirrored, bw) + local range, tls + = init_range(), luatexja.adjust.profile_hgap_factor*tex.lineskip.width + profile_inner(before, range, 3, true, tls) + profile_inner(after, range, 4, mirrored, tls) + range = range:flatten() + do + local dmax, d, hmax, h, lmin = 0, 0, 0, 0, 1/0 + for i,v in ipairs(range) do + d, h = (v[3] or 0), (v[4] or 0) + if d>dmax then dmax=d end + if h>hmax then hmax=h end + if bw-h-d<lmin then lmin=bw-h-d end + end + if lmin==1/0 then lmin = bw end + return lmin, + bw - lmin - getfield(before, 'depth') + - getfield(after, mirrored and 'depth' or 'height') + end + end +end + +do + local ltja = luatexja.adjust + local copy_glue = ltjl.copy_glue + local floor, max = math.floor, math.max + function ltjl.l_step(dist, g, adj, normal, bw, loc) + if loc=='alignment' then + return ltjl.l_dummy(dist, g, adj, normal, bw, loc) + end + if dist < tex.lineskiplimit then + local f = max(1, bw*ltja.step_factor) + copy_glue(g, tex.baselineskip, 1, normal - f * floor((dist-tex.lineskip.width)/f)) + else + copy_glue(g, tex.baselineskip, 2, normal) + end + end +end + + |