Aegisub/automation/include/karaskel-auto4.lua

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--[[
Copyright (c) 2007, Niels Martin Hansen, Rodrigo Braz Monteiro
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the Aegisub Group nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
]]
include("utils.lua")
include("unicode.lua")
-- Make sure karaskel table exists
if not karaskel then
karaskel = {}
end
-- Collect styles and metadata from the subs
function karaskel.collect_head(subs, generate_furigana)
local meta = { res_x = 0, res_y = 0 }
local styles = { n = 0 }
local toinsert = {}
local first_style_line = nil
if not karaskel.furigana_scale then
karaskel.furigana_scale = 0.5
end
-- First pass: collect all existing styles and get resolution info
for i = 1, #subs do
if aegisub.progress.is_cancelled() then error("User cancelled") end
local l = subs[i]
if l.class == "style" then
if not first_style_line then first_style_line = i end
-- Store styles into the style table
styles.n = styles.n + 1
styles[styles.n] = l
styles[l.name] = l
l.margin_v = l.margin_t -- convenience
-- And also generate furigana styles if wanted
if generate_furigana and not l.name:match("furigana") then
aegisub.debug.out(5, "Creating furigana style for style: " .. l.name)
local fs = table.copy(l)
fs.fontsize = l.fontsize * karaskel.furigana_scale
fs.outline = l.outline * karaskel.furigana_scale
fs.shadow = l.shadow * karaskel.furigana_scale
fs.name = l.name .. "-furigana"
table.insert(toinsert, fs) -- queue to insert in file
end
elseif l.class == "info" then
-- Also look for script resolution
local k = l.key:lower()
meta[k] = l.value
end
end
-- Second pass: insert all toinsert styles that don't already exist
for i = 1, #toinsert do
if not styles[toinsert[i].name] then
-- Insert into styles table
styles.n = styles.n + 1
styles[styles.n] = toinsert[i]
styles[toinsert[i].name] = toinsert[i]
-- And subtitle file
subs[-first_style_line] = toinsert[i]
end
end
-- Fix resolution data
if meta.playresx then
meta.res_x = math.floor(meta.playresx)
end
if meta.playresy then
meta.res_y = math.floor(meta.playresy)
end
if meta.res_x == 0 and meta_res_y == 0 then
meta.res_x = 384
meta.res_y = 288
elseif meta.res_x == 0 then
-- This is braindead, but it's how TextSub does things...
if meta.res_y == 1024 then
meta.res_x = 1280
else
meta.res_x = meta.res_y / 3 * 4
end
elseif meta.res_y == 0 then
-- As if 1280x960 didn't exist
if meta.res_x == 1280 then
meta.res_y = 1024
else
meta.res_y = meta.res_x * 3 / 4
end
end
return meta, styles
end
-- Pre-process line, determining stripped text, karaoke data and splitting off furigana data
-- Modifies the object passed for line
function karaskel.preproc_line_text(meta, styles, line)
-- Assume line is class=dialogue
local kara = aegisub.parse_karaoke_data(line)
line.kara = { n = 0 }
line.furi = { n = 0 }
line.text_stripped = ""
line.duration = line.end_time - line.start_time
local worksyl = { highlights = {n=0}, furi = {n=0} }
local cur_inline_fx = ""
for i = 0, #kara do
local syl = kara[i]
-- Detect any inline-fx tags
local inline_fx = syl.text:match("%{.*\\%-([^}\\]-)")
if inline_fx then
cur_inline_fx = inline_fx
end
-- Strip spaces (only basic ones, no fullwidth etc.)
local prespace, syltext, postspace = syl.text_stripped:match("^([ \t]*)(.-)([ \t]*)$")
-- See if we've broken a (possible) multi-hl stretch
-- If we did it's time for a new worksyl (though never for the zero'th syllable)
local prefix = syltext:sub(1,unicode.charwidth(syltext,1))
if prefix ~= "#" and prefix ~= "" and i > 0 then
line.kara[line.kara.n] = worksyl
line.kara.n = line.kara.n + 1
worksyl = { highlights = {n=0}, furi = {n=0} }
end
-- Add highlight data
local hl = {
start_time = syl.start_time,
end_time = syl.end_time,
duration = syl.duration
}
worksyl.highlights.n = worksyl.highlights.n + 1
worksyl.highlights[worksyl.highlights.n] = hl
-- Detect furigana (both regular and fullwidth pipes work)
-- Furigana is stored independantly from syllables
if syltext:find("|") or syltext:find("") then
-- Replace fullwidth pipes, they aren't regex friendly
syltext = syltext:gsub("", "|")
-- Get before/after pipe text
local maintext, furitext = syltext:match("^(.-)|(.-)$")
syltext = maintext
local furi = { }
furi.syl = worksyl
-- Magic happens here
-- isbreak = Don't join this furi visually with previous furi, even if their main texts are adjacent
-- spillback = Allow this furi text to spill over the left edge of the main text
-- (Furi is always allowed to spill over the right edge of main text.)
local prefix = furitext:sub(1,unicode.charwidth(furitext,1))
if prefix == "!" or prefix == "" then
furi.isbreak = true
furi.spillback = false
elseif prefix == "<" or prefix == "" then
furi.isbreak = true
furi.spillback = true
else
furi.isbreak = false
furi.spillback = false
end
-- Remove the prefix character from furitext, if there was one
if furi.isbreak then
furitext = furitext:sub(unicode.charwidth(furitext,1)+1)
end
-- Some of these may seem superflous, but a furi should ideally have the same "interface" as a syllable
furi.start_time = syl.start_time
furi.end_time = syl.end_time
furi.duration = syl.duration
furi.kdur = syl.duration / 10
furi.text = furitext
furi.text_stripped = furitext
furi.line = line
furi.tag = syl.tag
furi.inline_fx = cur_inline_fx
furi.i = line.kara.n
furi.prespace = ""
furi.postspace = ""
furi.highlights = { n=1, [1]=hl }
furi.isfuri = true
line.furi.n = line.furi.n + 1
line.furi[line.furi.n] = furi
worksyl.furi.n = worksyl.furi.n + 1
worksyl.furi[worksyl.furi.n] = furi
end
-- Syllables that aren't part of a multi-highlight generate a new output-syllable
if prefix ~= "#" and prefix ~= "" then
-- Update stripped line-text
line.text_stripped = line.text_stripped .. prespace .. syltext .. postspace
-- Copy data from syl to worksyl
worksyl.text = syl.text
worksyl.duration = syl.duration
worksyl.kdur = syl.duration / 10
worksyl.start_time = syl.start_time
worksyl.end_time = syl.end_time
worksyl.tag = syl.tag
worksyl.line = line
-- And add new data to worksyl
worksyl.i = line.kara.n
worksyl.text_stripped = prespace .. syltext .. postspace -- be sure to include the spaces so the original line can be built from text_stripped
worksyl.inline_fx = cur_inline_fx
worksyl.text_spacestripped = syltext
worksyl.prespace = prespace
worksyl.postspace = postspace
else
-- This is just an extra highlight
worksyl.duration = worksyl.duration + syl.duration
worksyl.kdur = worksyl.kdur + syl.duration / 10
worksyl.end_time = syl.end_time
end
end
-- Add the last syllable
line.kara[line.kara.n] = worksyl
-- But don't increment n here, n should be the highest syllable index! (The zero'th syllable doesn't count.)
end
-- Pre-calculate sizing information for the given line, no layouting is done
-- Modifies the object passed for line
function karaskel.preproc_line_size(meta, styles, line)
if not line.kara then
karaskel.preproc_line_text(meta, styles, line)
end
-- Add style information
if styles[line.style] then
line.styleref = styles[line.style]
else
aegisub.debug.out(2, "WARNING: Style not found: " .. line.style .. "\n")
line.styleref = styles[1]
end
-- Calculate whole line sizing
line.width, line.height, line.descent, line.extlead = aegisub.text_extents(line.styleref, line.text_stripped)
-- Calculate syllable sizing
for s = 0, line.kara.n do
local syl = line.kara[s]
syl.style = line.styleref
syl.width, syl.height = aegisub.text_extents(syl.style, syl.text_spacestripped)
syl.prespacewidth = aegisub.text_extents(syl.style, syl.prespace)
syl.postspacewidth = aegisub.text_extents(syl.style, syl.postspace)
end
-- Calculate furigana sizing
if styles[line.style .. "-furigana"] then
line.furistyle = styles[line.style .. "-furigana"]
else
aegisub.debug.out(4, "No furigana style defined for style '%s'\n", line.style)
line.furistyle = false
end
if line.furistyle then
for f = 1, line.furi.n do
local furi = line.furi[f]
furi.style = line.furistyle
furi.width, furi.height = aegisub.text_extents(furi.style, furi.text)
furi.prespacewidth = 0
furi.postspacewidth = 0
end
end
end
-- Layout a line, including furigana layout
-- Modifies the object passed for line
function karaskel.preproc_line_pos(meta, styles, line)
if not line.styleref then
karaskel.preproc_line_size(meta, styles, line)
end
-- Syllable layouting must be done before the rest, since furigana layout may change the total width of the line
if line.furistyle then
karaskel.do_furigana_layout(meta, styles, line)
else
karaskel.do_basic_layout(meta, styles, line)
end
-- Effective margins
line.margin_v = line.margin_t
line.eff_margin_l = ((line.margin_l > 0) and line.margin_l) or line.styleref.margin_l
line.eff_margin_r = ((line.margin_r > 0) and line.margin_r) or line.styleref.margin_r
line.eff_margin_t = ((line.margin_t > 0) and line.margin_t) or line.styleref.margin_t
line.eff_margin_b = ((line.margin_b > 0) and line.margin_b) or line.styleref.margin_b
line.eff_margin_v = ((line.margin_v > 0) and line.margin_v) or line.styleref.margin_v
-- And positioning
if line.styleref.align == 1 or line.styleref.align == 4 or line.styleref.align == 7 then
-- Left aligned
line.left = line.eff_margin_l
line.center = line.left + line.width / 2
line.right = line.left + line.width
line.x = line.left
line.halign = "left"
elseif line.styleref.align == 2 or line.styleref.align == 5 or line.styleref.align == 8 then
-- Centered
line.left = (meta.res_x - line.eff_margin_l - line.eff_margin_r - line.width) / 2 + line.eff_margin_l
line.center = line.left + line.width / 2
line.right = line.left + line.width
line.x = line.center
line.halign = "center"
elseif line.styleref.align == 3 or line.styleref.align == 6 or line.styleref.align == 9 then
-- Right aligned
line.left = meta.res_x - line.eff_margin_r - line.width
line.center = line.left + line.width / 2
line.right = line.left + line.width
line.x = line.right
line.halign = "right"
end
line.hcenter = line.center
if line.styleref.align >=1 and line.styleref.align <= 3 then
-- Bottom aligned
line.bottom = meta.res_y - line.eff_margin_b
line.middle = line.bottom - line.height / 2
line.top = line.bottom - line.height
line.y = line.bottom
line.valign = "bottom"
elseif line.styleref.align >= 4 and line.styleref.align <= 6 then
-- Mid aligned
line.top = (meta.res_y - line.eff_margin_t - line.eff_margin_b) / 2 + line.eff_margin_t
line.middle = line.top + line.height / 2
line.bottom = line.top + line.height
line.y = line.middle
line.valign = "middle"
elseif line.styleref.align >= 7 and line.styleref.align <= 9 then
-- Top aligned
line.top = line.eff_margin_t
line.middle = line.top + line.height / 2
line.bottom = line.top + line.height
line.y = line.top
line.valign = "top"
end
line.vcenter = line.middle
end
-- Do simple syllable layouting (no furigana)
function karaskel.do_basic_layout(meta, styles, line)
local curx = 0
for i = 0, line.kara.n do
local syl = line.kara[i]
syl.left = curx + syl.prespacewidth
syl.center = syl.left + syl.width / 2
syl.right = syl.left + syl.width
curx = curx + syl.prespacewidth + syl.width + syl.postspacewidth
end
end
-- Do advanced furigana layout algorithm
function karaskel.do_furigana_layout(meta, styles, line)
-- Start by building layout groups
-- Two neighboring syllables with furigana that join together are part of the same layout group
-- A forced split creates a new layout group
local lgroups = {}
-- Start-sentinel
local lgsentinel = {basewidth=0, furiwidth=0, syls={}, furi={}, spillback=false, left=0, right=0}
table.insert(lgroups, lgsentinel)
-- Create groups
local last_had_furi = false
local lg = { basewidth=0, furiwidth=0, syls={}, furi={}, spillback=false }
for s = 0, line.kara.n do
local syl = line.kara[s]
-- Furigana-less syllables always generate a new layout group
-- So do furigana-endowed syllables that are marked as split
-- But if current lg has no width (usually only first) don't create a new
aegisub.debug.out(5, "syl.furi.n=%d, isbreak=%s, last_had_furi=%s, lg.basewidth=%d\n", syl.furi.n, syl.furi.n > 0 and syl.furi[1].isbreak and "y" or "n", last_had_furi and "y" or "n", lg.basewidth)
if (syl.furi.n == 0 or syl.furi[1].isbreak or not last_had_furi) and lg.basewidth > 0 then
aegisub.debug.out(5, "Inserting layout group, basewidth=%d, furiwidth=%d, isbreak=%s\n", lg.basewidth, lg.furiwidth, syl.furi.n > 0 and syl.furi[1].isbreak and "y" or "n")
table.insert(lgroups, lg)
lg = { basewidth=0, furiwidth=0, syls={}, furi={}, spillback=false }
last_had_furi = false
end
-- Add this syllable to lg
lg.basewidth = lg.basewidth + syl.prespacewidth + syl.width + syl.postspacewidth
table.insert(lg.syls, syl)
aegisub.debug.out("\tAdding syllable to layout group: '%s', width=%d, isbreak=%s\n", syl.text_stripped, syl.width, syl.furi.n > 0 and syl.furi[1].isbreak and "y" or "n")
-- Add this syllable's furi to lg
for f = 1, syl.furi.n do
local furi = syl.furi[f]
lg.furiwidth = lg.furiwidth + furi.width
lg.spillback = lg.spillback or furi.spillback
table.insert(lg.furi, furi)
aegisub.debug.out("\tAdding furigana to layout group: %s (width=%d)\n", furi.text, furi.width)
last_had_furi = true
end
end
-- Insert last lg
aegisub.debug.out(5, "Inserting layout group, basewidth=%d, furiwidth=%d\n", lg.basewidth, lg.furiwidth)
table.insert(lgroups, lg)
-- And end-sentinel
table.insert(lgroups, lgsentinel)
-- Layout the groups at macro-level
-- Skip sentinel at ends in loop
local curx = 0
for i = 2, #lgroups-1 do
local lg = lgroups[i]
local prev = lgroups[i-1]
-- Three cases: No furigana, furigana smaller than base and furigana larger than base
if lg.furiwidth == 0 then
-- Here wa can basically just place the base text
lg.left = curx
lg.right = lg.left + lg.basewidth
-- If there was any spillover from a previous group, add it to here
if prev.rightspill and prev.rightspill > 0 then
lg.leftspill = 0
lg.rightspill = lg.basewidth - prev.rightspill
prev.rightspill = 0
end
curx = curx + lg.basewidth
elseif lg.furiwidth <= lg.basewidth then
-- If there was any rightspill from previous group, we have to stay 100% clear of that
if prev.rightspill and prev.rightspill > 0 then
curx = curx + prev.rightspill
prev.rightspill = 0
end
lg.left = curx
lg.right = lg.left + lg.basewidth
curx = curx + lg.basewidth
-- Negative spill here
lg.leftspill = (lg.furiwidth - lg.basewidth) / 2
lg.rightspill = lg.leftspill
else
-- Furigana is wider than base, we'll have to spill in some direction
if prev.rightspill and prev.rightspill > 0 then
curx = curx + prev.rightspill
prev.rightspill = 0
end
-- Do we spill only to the right or in both directions?
if lg.spillback then
-- Both directions
lg.leftspill = (lg.furiwidth - lg.basewidth) / 2
lg.rightspill = lg.leftspill
-- If there was any furigana or spill on previous syllable we can't overlap it
if prev.rightspill then
lg.left = curx + lg.leftspill
else
lg.left = curx
end
else
-- Only to the right
lg.leftspill = 0
lg.rightspill = lg.furiwidth - lg.basewidth
lg.left = curx
end
lg.right = lg.left + lg.basewidth
curx = lg.right
end
end
-- Now the groups are layouted, so place the individual syllables/furigana
for i, lg in ipairs(lgroups) do
local basecenter = (lg.left + lg.right) / 2 -- centered furi is centered over this
local curx = lg.left -- base text is placed from here on
-- Place base syllables
for s, syl in ipairs(lg.syls) do
syl.left = curx + syl.prespacewidth
syl.center = syl.left + syl.width/2
syl.right = syl.left + syl.width
curx = syl.right + syl.postspacewidth
end
if curx > line.width then line.width = curx end
-- Place furigana
if lg.furiwidth < lg.basewidth or lg.spillback then
-- Center over group
curx = lg.left + (lg.basewidth - lg.furiwidth) / 2
else
-- Left aligned
curx = lg.left
end
for f, furi in ipairs(lg.furi) do
furi.left = curx
furi.center = furi.left + furi.width/2
furi.right = furi.left + furi.width
curx = furi.right
end
end
end
-- Precalc some info on a line
-- Modifies the line parameter
function karaskel.preproc_line(subs, meta, styles, line)
-- subs parameter is never used and probably won't ever be
-- (it wouldn't be fun if some lines suddenly changed index here)
-- pass whatever you want, but be careful calling preproc_line_pos directly, that interface might change
karaskel.preproc_line_pos(meta, styles, line)
end
-- An actual "skeleton" function
-- Parses the first word out of the Effect field of each dialogue line and runs "fx_"..effect on that line
-- Lines with empty Effect field run fx_none
-- Lines with unimplemented effects are left alone
-- If the effect function returns true, the original line is kept in output,
-- otherwise the original line is converted to a comment
-- General prototype of an fx function: function(subs, meta, styles, line, fxdata)
-- fxdata are extra data after the effect name in the Effect field
function karaskel.fx_library_main(subs)
aegisub.progress.task("Collecting header info")
meta, styles = karaskel.collect_head(subs)
aegisub.progress.task("Processing subs")
local i, maxi = 1, #subs
while i <= maxi do
aegisub.progress.set(i/maxi*100)
local l = subs[i]
if l.class == "dialogue" then
aegisub.progress.task(l.text)
karaskel.preproc_line(subs, meta, styles, l)
local keep = true
local fx, fxdata = string.headtail(l.effect)
if fx == "" then fx = "none" end
if _G["fx_" .. fx] then
-- note to casual readers: _G is a special global variable that points to the global environment
-- specifically, _G["_G"] == _G
keep = _G["fx_" .. fx](subs, meta, styles, l, fxdata)
end
if not keep then
l = subs[i]
l.comment = true
subs[i] = l
end
end
i = i + 1
end
end
-- Register an fx_library type karaoke
karaskel.fx_library_registered = false
function karaskel.use_fx_library(macrotoo)
if karaskel.fx_library_registered then return end
aegisub.register_filter(script_name or "fx_library", script_description or "Apply karaoke effects (fx_library skeleton)", 2000, karaskel.fx_library_main)
if macrotoo then
local function fxlibmacro(subs)
karaskel.fx_library_main(subs)
aegisub.set_undo_point(script_name or "karaoke effect")
end
aegisub.register_macro(script_name or "fx_library", script_description or "Apply karaoke effects (fx_library skeleton)", fxlibmacro)
end
end