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Fixed rare case where core.doc.highlighter would iterate out of line bounds

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This commit is contained in:
rxi 2020-05-09 08:56:30 +01:00
parent a651d48e84
commit 18b7d70a91
1 changed files with 8 additions and 7 deletions
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15
data/core/doc/highlighter.lua
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@ -10,20 +10,20 @@ local Highlighter = Object:extend()
function Highlighter:new(doc) function Highlighter:new(doc)
self.doc = doc self.doc = doc
self.lines = {} self.lines = {}
self.last_valid_line = 1 self.first_invalid_line = 1
self.max_wanted_line = 0 self.max_wanted_line = 0
-- init incremental syntax highlighting -- init incremental syntax highlighting
core.add_thread(function() core.add_thread(function()
while true do while true do
if self.last_valid_line > self.max_wanted_line then if self.first_invalid_line > self.max_wanted_line then
self.max_wanted_line = 0 self.max_wanted_line = 0
coroutine.yield(1 / config.fps) coroutine.yield(1 / config.fps)
else else
local max = math.min(self.last_valid_line + 40, self.max_wanted_line) local max = math.min(self.first_invalid_line + 40, self.max_wanted_line)
for i = self.last_valid_line, max do for i = self.first_invalid_line, max do
local state = (i > 1) and self.lines[i - 1].state local state = (i > 1) and self.lines[i - 1].state
local line = self.lines[i] local line = self.lines[i]
if not (line and line.init_state == state) then if not (line and line.init_state == state) then
@ -31,7 +31,7 @@ function Highlighter:new(doc)
end end
end end
self.last_valid_line = max + 1 self.first_invalid_line = max + 1
core.redraw = true core.redraw = true
coroutine.yield() coroutine.yield()
end end
@ -41,7 +41,8 @@ end
function Highlighter:invalidate(idx) function Highlighter:invalidate(idx)
self.last_valid_line = idx self.first_invalid_line = idx
self.max_wanted_line = math.min(self.max_wanted_line, #self.doc.lines)
end end
@ -60,7 +61,7 @@ function Highlighter:get_line(idx)
local prev = self.lines[idx - 1] local prev = self.lines[idx - 1]
line = self:tokenize_line(idx, prev and prev.state) line = self:tokenize_line(idx, prev and prev.state)
self.lines[idx] = line self.lines[idx] = line
self.last_valid_line = math.min(self.last_valid_line, idx) self.first_invalid_line = math.min(self.first_invalid_line, idx)
end end
self.max_wanted_line = math.max(self.max_wanted_line, idx) self.max_wanted_line = math.max(self.max_wanted_line, idx)
return line return line