add smoothcaret.lua

2 files changed, 27 insertions, 0 deletions

diff --git a/README.md b/README.md
index 5e40895..cc44cda 100644
--- a/README.md
+++ b/README.md
@@ -126,6 +126,7 @@ Plugin | Description
 [`scalestatus`](plugins/scalestatus.lua?raw=1) | Displays current scale (zoom) in status view (depends on scale plugin)
 [`selectionhighlight`](plugins/selectionhighlight.lua?raw=1) | Highlights regions of code that match the current selection *([screenshot](https://user-images.githubusercontent.com/3920290/80710883-5f597c80-8ae7-11ea-97f0-76dfacc08439.png))*
 [`smallclock`](plugins/smallclock.lua?raw=1) | Displays the current time in the corner of the status view
+*[`smoothcaret`](plugins/smoothcaret.lua?raw=1)* | Smooth caret animation *([gif](https://user-images.githubusercontent.com/20792268/139006049-a0ba6559-88cb-49a7-8077-4822445b4a1f.gif))*
 [`sort`](plugins/sort.lua?raw=1) | Sorts selected lines alphabetically
 [`spellcheck`](plugins/spellcheck.lua?raw=1) | Underlines misspelt words *([screenshot](https://user-images.githubusercontent.com/3920290/79923973-9caa7400-842e-11ea-85d4-7a196a91ca50.png))* *— note: on Windows a [`words.txt`](https://github.com/dwyl/english-words/blob/master/words.txt) dictionary file must be placed beside the exe*
 [`tabnumbers`](plugins/tabnumbers.lua?raw=1) | Displays tab numbers from 1–9 next to their names *([screenshot](https://user-images.githubusercontent.com/16415678/101285362-007a8500-37e5-11eb-869b-c10eb9d9d902.png))
diff --git a/plugins/smoothcaret.lua b/plugins/smoothcaret.lua
new file mode 100644
index 0000000..26f7d98
--- /dev/null
+++ b/plugins/smoothcaret.lua
@@ -0,0 +1,26 @@
+-- mod-version:2 -- lite-xl 2.0
+local config = require "core.config"
+local style = require "core.style"
+local DocView = require "core.docview"
+
+config.plugins.smoothcaret = { rate = 0.65 }
+
+local docview_update = DocView.update
+function DocView:update()
+  docview_update(self)
+
+  if not self.caret then
+    self.caret = { current = { x = 0, y = 0 }, target = { x = 0, y = 0 } }
+  end  
+  local c = self.caret
+  self:move_towards(c.current, "x", c.target.x, config.plugins.smoothcaret.rate)
+  self:move_towards(c.current, "y", c.target.y, config.plugins.smoothcaret.rate)
+end
+
+function DocView:draw_caret(x, y)
+  local c = self.caret
+  local lh = self:get_line_height()
+  c.target.x = x
+  c.target.y = y
+  renderer.draw_rect(c.current.x, c.current.y, style.caret_width, lh, style.caret)
+end