From 7a47b97e21983913b98267484b4fd2a38cef3efa Mon Sep 17 00:00:00 2001 From: rxi Date: Fri, 29 May 2020 12:52:20 +0100 Subject: Added `motiontrail` plugin --- plugins/motiontrail.lua | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 plugins/motiontrail.lua (limited to 'plugins/motiontrail.lua') diff --git a/plugins/motiontrail.lua b/plugins/motiontrail.lua new file mode 100644 index 0000000..e688e1b --- /dev/null +++ b/plugins/motiontrail.lua @@ -0,0 +1,46 @@ +local core = require "core" +local config = require "core.config" +local style = require "core.style" +local DocView = require "core.docview" + +config.motiontrail_steps = 50 + + +local function lerp(a, b, t) + return a + (b - a) * t +end + + +local function get_caret_rect(dv) + local line, col = dv.doc:get_selection() + local x, y = dv:get_line_screen_position(line) + x = x + dv:get_col_x_offset(line, col) + return x, y, style.caret_width, dv:get_line_height() +end + + +local last_x, last_y, last_view + +local draw = DocView.draw + +function DocView:draw(...) + draw(self, ...) + if self ~= core.active_view then return end + + local x, y, w, h = get_caret_rect(self) + + if last_view == self and (x ~= last_x or y ~= last_y) then + local lx = x + for i = 0, 1, 1 / config.motiontrail_steps do + local ix = lerp(x, last_x, i) + local iy = lerp(y, last_y, i) + local iw = math.max(w, math.ceil(math.abs(ix - lx))) + renderer.draw_rect(ix, iy, iw, h, style.caret) + lx = ix + end + core.redraw = true + end + + last_view, last_x, last_y = self, x, y +end + -- cgit v1.2.3