57 lines
1.4 KiB
Lua
57 lines
1.4 KiB
Lua
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local core = require "core"
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local config = require "core.config"
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local style = require "core.style"
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local Doc = require "core.doc"
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local DocView = require "core.docview"
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config.motiontrail_steps = config.motiontrail_steps or 50
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local function doc()
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return core.active_view.doc
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end
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local function lerp(a, b, t)
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return a + (b - a) * t
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end
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local function get_caret_rect(dv, idx)
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local line1, col1, line2, col2 = doc():get_selection_idx(idx)
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local x1, y1 = dv:get_line_screen_position(line1)
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x1 = x1 + dv:get_col_x_offset(line1, col1)
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return x1, y1, style.caret_width, dv:get_line_height()
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end
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local last_x = {}
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local last_y = {}
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local last_view = {}
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local draw = DocView.draw
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function DocView:draw(...)
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draw(self, ...)
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if self ~= core.active_view then return end
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for idx, line1, col1, line2, col2 in doc():get_selections(true, true) do
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--if line1 == line2 and col1 == col2 then return false end
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local x, y, w, h = get_caret_rect(self, idx)
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if last_view[idx] == self and (x ~= last_x[idx] or y ~= last_y[idx]) then
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local lx = x
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for i = 0, 1, 1 / config.motiontrail_steps do
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local ix = lerp(x, last_x[idx], i)
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local iy = lerp(y, last_y[idx], i)
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local iw = math.max(w, math.ceil(math.abs(ix - lx)))
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renderer.draw_rect(ix, iy, iw, h, style.caret)
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lx = ix
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end
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core.redraw = true
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end
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last_view[idx], last_x[idx], last_y[idx] = self, x, y
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end
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end
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