9304049654

Committed 30 May 2024 02:12PM UTC coverage: 60.021% (-14.7%) from 74.707%

Build # 9304049654

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push

github

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web-flow

Commit Message

Merge 1a26b4f22 into a1fd105f8

Run Details

6743 of 12900 new or added lines in 186 files covered. (52.27%)

347 existing lines in 49 files now uncovered.

10311 of 17179 relevant lines covered (60.02%)

3307.34 hits per line

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0.0

/packages/balanced-frames/init.lua

UNCOV 1	local base = require("packages.base")	×
2
UNCOV 3	local package = pl.class(base)	×
UNCOV 4	package._name = "balanced-frames"	×
5
UNCOV 6	local BALANCE_PENALTY = -17777	×
7
8	local unbalanced_buildPage
9
10	local function buildPage (typesetter, independent)
NEW 11	local frame = typesetter.frame	×
NEW 12	if not (frame.balanced == true) then	×
NEW 13	return unbalanced_buildPage(typesetter, independent)	×
14	end
15
NEW 16	local colCount = 0	×
NEW 17	local target = SILE.types.length()	×
NEW 18	while frame and frame.balanced == true do	×
NEW 19	target = target + frame:height()	×
NEW 20	colCount = colCount + 1	×
NEW 21	if frame.next then	×
NEW 22	frame = SILE.getFrame(frame.next)	×
23	else
24	break
25	end
26	end
27
28	-- Really, try and avoid doing anything, where possible.
NEW 29	if colCount == 1 then	×
NEW 30	return unbalanced_buildPage(typesetter, independent)	×
31	end
32	-- If the total amount of stuff on the output list is greater then the total
33	-- of frame space on the page, and there are no magic requests to balance the
34	-- columns, then we have a full page. Just send it out normally.
NEW 35	local q = typesetter.state.outputQueue	×
NEW 36	local totalHeight = SILE.types.length()	×
NEW 37	local mustBalance = 0	×
NEW 38	for i = 1, #q do	×
NEW 39	totalHeight = totalHeight + q[i].height + q[i].depth	×
NEW 40	if q[i].is_penalty and q[i].penalty <= BALANCE_PENALTY then	×
NEW 41	mustBalance = i	×
42	break
43	end
44	end
NEW 45	if totalHeight.length > target.length and mustBalance == 0 and not independent then	×
NEW 46	return unbalanced_buildPage(typesetter, independent)	×
47	end
48
49	-- Have we been explicitly asked to find a pagebreak at this point?
50	-- If not, don't bother
NEW 51	if mustBalance == 0 and not independent then	×
NEW 52	return false	×
53	end
NEW 54	SU.debug("balancer", "Balancing", totalHeight, "of material over", colCount, "frames (total of", target, ")")	×
NEW 55	SU.debug("balancer", "Must balance because mustBalance =", mustBalance, "and independent =", independent)	×
56	-- OK. Now we have to balance the frames. We are going to cheat and
57	-- adjust the height of each frame to be an appropriate fraction of
58	-- the content height
NEW 59	frame = typesetter.frame	×
NEW 60	SU.debug("balancer", "Each column is now", totalHeight.length / colCount)	×
NEW 61	while frame and frame.balanced == true do	×
NEW 62	frame:relax("bottom")	×
NEW 63	frame:constrain("height", totalHeight.length / colCount)	×
NEW 64	if frame.next then	×
NEW 65	frame = SILE.getFrame(frame.next)	×
66	else
67	break
68	end
69	end
NEW 70	typesetter.state.lastPenalty = 0	×
NEW 71	local oldPageBuilder = SILE.pagebuilder	×
NEW 72	SILE.pagebuilder = SILE.pagebuilders.base()	×
NEW 73	while typesetter.frame and typesetter.frame.balanced do	×
NEW 74	unbalanced_buildPage(typesetter, true)	×
NEW 75	if typesetter.frame.next and SILE.getFrame(typesetter.frame.next).balanced == true then	×
NEW 76	typesetter:initFrame(SILE.getFrame(typesetter.frame.next))	×
NEW 77	typesetter:runHooks("newframe")	×
78	else
79	break -- Break early, because when we return
80	end
81	end
NEW 82	SILE.pagebuilder = oldPageBuilder	×
NEW 83	SU.debug("balancer", "Finished this balance, frame id is now", typesetter.frame)	×
84	-- SILE.typesetter:debugState()
85	-- We're done.
NEW 86	return true	×
87	end
88
NEW 89	function package:_init (options)	×
NEW 90	base._init(self, options)	×
NEW 91	self.class:registerPostinit(function (_)	×
NEW 92	if not unbalanced_buildPage then	×
NEW 93	unbalanced_buildPage = SILE.typesetter.buildPage	×
NEW 94	SILE.typesetter.buildPage = buildPage	×
NEW 95	SILE.typesetters.base.buildPage = buildPage	×
96	end
97	end)
98	end
99
UNCOV 100	function package:registerCommands ()	×
NEW 101	self:registerCommand("balancecolumns", function (_, _)	×
NEW 102	SILE.typesetter:leaveHmode()	×
NEW 103	SILE.call("penalty", { penalty = BALANCE_PENALTY })	×
104	end)
105	end
106
107	package.documentation = [[
108	\begin{document}
109	This package attempts to ensure that the main content frames on a page are balanced; that is, that they have the same height.
110	In your frame definitions for the columns, you will need to ensure that they have the parameter \autodoc:parameter{balanced} set to \code{true}.
111	See the example in \code{tests/balanced.sil}.
112
113	The current algorithm does not work particularly well, and a better solution to the column problem is being developed.
114	\end{document}
UNCOV 115	]]	×
116
UNCOV 117	return package	×

sile-typesetter / sile / 9304049654

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