-
Notifications
You must be signed in to change notification settings - Fork 0
/
easingpreview.lua
384 lines (331 loc) · 9.79 KB
/
easingpreview.lua
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
-- mod-version:3 -- lite-xl 2.1
-- Easing Previewer by @thacuber2a03
-- currently only works in lua
-- requires
local core = require 'core'
local config = require 'core.config'
local Object = require 'core.object'
local common = require 'core.common'
local command = require 'core.command'
local keymap = require 'core.keymap'
local style = require 'core.style'
local DocView = require 'core.docview'
-- I just have it here because I need to check something
local CommandView = require 'core.commandview'
-- config
config.plugins.easing_previewer = common.merge({
displayWidth = 150,
displayHeight = 100,
arrowWidth = 0.2,
arrowHeight = 0.2,
pointSize = 5,
steps = 100,
padding = 10,
config_spec = {
name = "Easing Previewer",
{
label = "Width",
description = "Width of the easing display in pixels.",
path = "displayWidth",
type = "number",
default = 150,
min = 100,
max = 300,
},
{
label = "Height",
description = "Height of the easing display in pixels.",
path = "displayHeight",
type = "number",
default = 100,
min = 100,
max = 300,
},
{
label = "Arrow width",
description = "Normalized width of the frame's arrow.",
path = "arrowWidth",
type = "number",
default = .2,
min = 0,
max = 1,
},
{
label = "Arrow height",
description = "Normalized height of the frame's arrow.",
path = "arrowHeight",
type = "number",
default = .2,
min = 0,
max = 1,
},
{
label = "Point size",
description = "Size of the points in the easing display.",
path = "pointSize",
type = "number",
default = 4,
min = 2,
max = 5,
},
{
label = "Step size",
description = "Kinda like the resolution of the easing display.",
path = "steps",
type = "number",
default = 100,
min = 10,
max = 1000,
},
{
label = "Padding",
description = "Padding of almost everything in this plugin.",
path = "padding",
type = "number",
default = 10,
min = 5,
max = 20,
}
}
}, config.plugins.easing_previewer)
-- helpers
local function getEasingFunctionAtCaret()
local doc = core.active_view.doc
local caretY = doc:get_selection()
local line = doc.lines[caretY]
-- I want it to work for literally any programmer
local easingFuncSignature = "function%s*[%w_]*%s*%(%s*t,%s*b%s*,%s*c%s*,%s*d%s*"
-- find normal penner easing func
local start = line:find(easingFuncSignature.."%)")
-- find easing func with parameter s
if not start then start = line:find(easingFuncSignature..",%s*s%s*%)") end
-- find easing func with parameters a and p (amplitude and period)
if not start then start = line:find(easingFuncSignature..",%s*a%s*,%s*a%s*%)") end
local easingFunction
if start then
-- if it's a one-liner
if line:find("end$") then return line, nil end
easingFunction = "function(t, b, c, d)\n"
local lineOffset = 1
local endCount = 0
local functionEnd = false
while true do
if not doc.lines[caretY+lineOffset] then
return nil, {"Hit end of file before end of function."}
end
for _, _, text in doc.highlighter:each_token(caretY+lineOffset) do
if text == "function" or text == "then" or text == "do" then
endCount = endCount + 1
end
if text == "end" then endCount = endCount - 1 end
if endCount < 0 then
easingFunction = easingFunction .. "end"
functionEnd = true
break
end
end
if functionEnd then break end
local endLine = doc.lines[caretY+lineOffset]
easingFunction = easingFunction .. endLine
lineOffset = lineOffset + 1
end
return easingFunction, nil
else
return nil, {
"Couldn't detect an easing function in this line.",
"Make sure the caret is over the function signature, and that",
"the function contains the parameters 't', 'b', 'c' and 'd', in that order.",
"The function can also optionally contain either the parameter 's'",
"or the parameters 'a' and 'p', but not both."
}
end
end
local function longestStringInTable(t)
local tableCopy = {table.unpack(t)}
table.sort(tableCopy, function(a,b) return #a > #b end)
local str = tableCopy[1]
tableCopy = nil
collectgarbage()
return str
end
-- EasingPreview
local EasingPreview = Object:extend()
function EasingPreview:new()
self:reload()
self:hide()
end
function EasingPreview:reload()
self.isValidFunction = false
self.errorMessage = {"Placeholder"}
self.x = 0
self.y = 0
self.dispw = config.plugins.easing_previewer.displayWidth
self.w = self.dispw
self.padding = config.plugins.easing_previewer.padding
self.steps = config.plugins.easing_previewer.steps
self.sizeOfPoints = config.plugins.easing_previewer.pointSize
self.h = 0
self.hgoal = 0
self.disph = config.plugins.easing_previewer.displayHeight
self.arrowHeight = config.plugins.easing_previewer.arrowHeight
self.arrowWidth = config.plugins.easing_previewer.arrowWidth
end
function EasingPreview:invalidate(err)
self.isValidFunction = false
if err then self.errorMessage = err end
end
function EasingPreview:validate()
local func, err = getEasingFunctionAtCaret()
if not func then
self:invalidate(err)
return
else
self.isValidFunction = true
local loadedFunc, loadErr = load("return "..func)
if loadErr then
self:invalidate { "There was an error loading this function:", loadErr, }
return
else
loadedFunc = loadedFunc() -- get the actual easing function
xpcall(function()
if loadedFunc(0.5, 0, 1, 1) == nil then
self:invalidate { "Uhhh, this function doesn't return anything...", }
return
end
self.easingFunc = loadedFunc
end, function(err)
self:invalidate { "There was an error running this function:", err }
return
end)
end
end
end
function EasingPreview:show()
self:reload()
self.shown = true
self.oldCaretX, self.oldCaretY = core.active_view.doc:get_selection()
self:validate()
if not self.isValidFunction then
local biggestWidth = style.font:get_width(longestStringInTable(self.errorMessage))
self.w = biggestWidth + self.padding*2
self.hgoal = #self.errorMessage*style.font:get_height() + self.padding * 2
self.arrowWidth = (biggestWidth/self.w)/10
self.arrowHeight = 0.25
else
self.w = self.dispw
self.hgoal = self.disph
self.arrowWidth = .2
self.arrowHeight = .2
end
end
function EasingPreview:hide()
self.shown = false
self.hgoal = 0
end
function EasingPreview:shiftHeightTowards(h)
if math.abs(h-self.h) < 0.1 then self.h = h end
self.h = self.h + (self.hgoal - self.h) * .125
if self.h ~= self.hgoal then core.redraw = true end
end
function EasingPreview:update()
self:shiftHeightTowards(self.hgoal)
local isDocView = core.active_view:is(DocView)
if not isDocView or not self.shown then self:hide() end
if self.shown or isDocView then
local caretX, caretY = core.active_view.doc:get_selection()
if self.oldCaretX ~= caretX or self.oldCaretY ~= caretY then self:hide() end
self.oldCaretX = caretX self.oldCaretY = caretY
if self.hgoal ~= 0 then
self.x, self.y = core.active_view:get_line_screen_position(caretX, caretY)
end
end
end
function EasingPreview:draw()
local view = core.active_view
local arrowWidth = self.arrowWidth*self.w
local arrowHeight = self.arrowHeight*self.h
local xpos = math.max(view.position.x+self.padding*2, self.x-self.w/2)
local ypos = self.y-self.h-arrowHeight
local flipArrow = false
if ypos < view.position.y+self.padding then
flipArrow = true
ypos = self.y+arrowHeight*2
end
local frameColor = style.background3
-- draw arrow
for i = 1, arrowHeight do
local t = i/arrowHeight
local drawWidth = common.lerp(0, arrowWidth, t)
local arrowY = self.y-common.lerp(0, arrowHeight, t)
if flipArrow then arrowY = self.y+arrowHeight+common.lerp(0, arrowHeight, t) end
renderer.draw_rect(
(self.x)-drawWidth/2, arrowY,
drawWidth, 1, frameColor
)
end
core.push_clip_rect(xpos, ypos, self.w, self.h)
-- draw widget
renderer.draw_rect(xpos, ypos, self.w, self.h, style.background)
if self.isValidFunction then
renderer.draw_rect(xpos+self.padding, ypos, 2, self.h, style.text)
renderer.draw_rect(xpos, ypos+self.padding, self.w, 2, style.text)
renderer.draw_rect(xpos+self.w-self.padding, ypos, 2, self.h, style.text)
renderer.draw_rect(xpos, ypos+self.h-self.padding, self.w, 2, style.text)
local s = self.sizeOfPoints/2
for i=0, self.steps do
local t = i/self.steps
local easeY = self.easingFunc(i, 0, 1, self.steps)
renderer.draw_rect(
common.lerp(xpos+self.padding-s, xpos+self.w-self.padding, t),
common.lerp(ypos+self.h-self.padding-s, ypos+self.padding-s, easeY),
self.sizeOfPoints, self.sizeOfPoints, style.caret
)
end
else
local totalHeight = #self.errorMessage*style.font:get_height()
for i,message in ipairs(self.errorMessage) do
renderer.draw_text(
style.font, message,
xpos+self.w/2-style.font:get_width(message)/2,
ypos+self.h/2-totalHeight/2+(i-1)*style.font:get_height(),
style.text
)
end
end
-- draw frame
renderer.draw_rect(xpos, ypos, self.w, 2, frameColor)
renderer.draw_rect(xpos+self.w-2, ypos, 2, self.h, frameColor)
renderer.draw_rect(xpos, ypos+self.h-2, self.w, 2, frameColor)
renderer.draw_rect(xpos, ypos, 2, self.h, frameColor)
core.pop_clip_rect(xpos, ypos, self.w, self.h)
end
-- code injection
local instance = EasingPreview()
local dv_update = DocView.update
function DocView:update(...)
dv_update(self, ...)
if instance.h ~= 0 or instance.shown then
instance:update()
end
end
local dv_draw = DocView.draw
function DocView:draw(...)
dv_draw(self, ...)
if instance.h ~= 0 then
instance:draw()
end
end
-- settings
command.add(nil, {
["easing-preview:show"] = function()
local view = core.active_view
if view:is(DocView) then instance:show() end
end,
-- if you for some reason feel like hiding it manually
["easing-preview:hide"] = function() instance:hide() end
})
keymap.add {
["ctrl+shift+e"] = "easing-preview:show",
["ctrl+alt+e"] = "easing-preview:hide",
}
return EasingPreview