Add Hybrid Line-numbers option to linenumbers.lua (#309)

* Update manifest.json

* Include Hybrid Line Number option

Add Hybrid line number option to linenumbers.lua plugin

* Update linenumbers.lua

* Update linenumbers.lua

* Update linenumbers.lua

* Update linenumbers.lua

* Removed unnecessary comment

Removed old and unnecessary comment

2 files changed, 57 insertions, 30 deletions

diff --git a/manifest.json b/manifest.json
index 48375d5..36a7b26 100644
--- a/manifest.json
+++ b/manifest.json
@@ -967,7 +967,7 @@
     },
     {
       "description": "The ability to change the display of the line number *([screenshot](https://user-images.githubusercontent.com/5556081/129493788-6a4cbd7a-9074-4133-bab7-110ed55f18f7.png))*",
-      "version": "0.1",
+      "version": "0.2",
       "path": "plugins/linenumbers.lua",
       "id": "linenumbers",
       "mod_version": "3"
diff --git a/plugins/linenumbers.lua b/plugins/linenumbers.lua
index c075776..2b2f508 100644
--- a/plugins/linenumbers.lua
+++ b/plugins/linenumbers.lua
@@ -8,6 +8,7 @@ local command = require "core.command"
 config.plugins.linenumbers = common.merge({
   show = true,
   relative = false,
+  hybrid = false,
   -- The config specification used by the settings gui
   config_spec = {
     name = "Line Numbers",
@@ -24,6 +25,13 @@ config.plugins.linenumbers = common.merge({
       path = "relative",
       type = "toggle",
       default = false
+    },
+    {
+      label = "Hybrid Line Numbers",
+      description = "Display hybrid line numbers starting from active line (Overpowers relative line-numbers).",
+      path = "hybrid",
+      type = "toggle",
+      default = false
     }
   }
 }, config.plugins.linenumbers)
@@ -37,46 +45,49 @@ function DocView:draw_line_gutter(line, x, y, width)
     return lh
   end
 
-  if config.plugins.linenumbers.relative then
-    local color = style.line_number
-    local local_idx = line
+  if not (config.plugins.linenumbers.relative or config.plugins.linenumbers.hybrid) then
+    return draw_line_gutter(self, line, x, y, width)
+  end
 
-    for _, line1, _, line2 in self.doc:get_selections(true) do
-      if line >= line1 and line <= line2 then
-        color = style.line_number2
-        break
-      end
-    end
+  local color = style.line_number
 
-    local l1 = self.doc:get_selection(false)
-    if line == l1 then
+  for _, line1, _, line2 in self.doc:get_selections(true) do
+    if line == line1 then
       color = style.line_number2
-      local_idx = 0
-    else
-      local_idx = math.abs(line - l1)
+      break
     end
+  end
 
-    common.draw_text(
-      self:get_font(),
-      color, local_idx, "right",
-      x + style.padding.x,
-      y,
-      width, lh
-    )
-  else
-    return draw_line_gutter(self, line, x, y, width)
+  local l1 = self.doc:get_selection(false)
+  local local_idx = math.abs(line - l1)
+  local alignment = "right"
+  local x_offset = style.padding.x
+
+  if config.plugins.linenumbers.hybrid and line == l1 then
+    local_idx = line
+    alignment = "left"
+    x_offset = 0
   end
+
+  common.draw_text(
+    self:get_font(),
+    color, local_idx, alignment,
+    x + x_offset,
+    y,
+    width, lh
+  )
+
   return lh
 end
 
 function DocView:get_gutter_width(...)
   if
-    not config.plugins.linenumbers.show
+      not config.plugins.linenumbers.show
   then
     local width = get_gutter_width(self, ...)
 
     local correct_width = self:get_font():get_width(#self.doc.lines)
-      + (style.padding.x * 2)
+        + (style.padding.x * 2)
 
     -- compatibility with center doc
     if width <= correct_width then
@@ -90,15 +101,15 @@ function DocView:get_gutter_width(...)
 end
 
 command.add(nil, {
-  ["line-numbers:toggle"]  = function()
+  ["line-numbers:toggle"]           = function()
     config.plugins.linenumbers.show = not config.plugins.linenumbers.show
   end,
 
-  ["line-numbers:disable"] = function()
+  ["line-numbers:disable"]          = function()
     config.plugins.linenumbers.show = false
   end,
 
-  ["line-numbers:enable"]  = function()
+  ["line-numbers:enable"]           = function()
     config.plugins.linenumbers.show = true
   end,
 
@@ -110,7 +121,23 @@ command.add(nil, {
     config.plugins.linenumbers.relative = true
   end,
 
-  ["relative-line-numbers:disable"]  = function()
+  ["relative-line-numbers:disable"] = function()
+    config.plugins.linenumbers.relative = false
+  end,
+
+  ["hybrid-line-numbers:toggle"]    = function()
+    config.plugins.linenumbers.hybrid = not config.plugins.linenumbers.hybrid
+    if config.plugins.linenumbers.hybrid then
+      config.plugins.linenumbers.relative = false -- Disable relative mode when enabling hybrid mode
+    end
+  end,
+
+  ["hybrid-line-numbers:enable"]    = function()
+    config.plugins.linenumbers.hybrid = true
     config.plugins.linenumbers.relative = false
+  end,
+
+  ["hybrid-line-numbers:disable"]   = function()
+    config.plugins.linenumbers.hybrid = false
   end
 })