Added plugin `colorpreview`

1 files changed, 49 insertions, 0 deletions

diff --git a/plugins/colorpreview.lua b/plugins/colorpreview.lua
new file mode 100644
index 0000000..8095f4e
--- /dev/null
+++ b/plugins/colorpreview.lua
@@ -0,0 +1,49 @@
+local common = require "core.common"
+local DocView = require "core.docview"
+
+
+local white = { common.color "#ffffff" }
+local black = { common.color "#000000" }
+local tmp = {}
+
+
+local function draw_color_previews(self, idx, x, y, ptn, base)
+  local text = self.doc.lines[idx]
+  local s, e = 0, 0
+
+  while true do
+    s, e = text:find(ptn, e + 1)
+    if not s then break end
+
+    local str = text:sub(s, e)
+    local r, g, b = str:match(ptn)
+    r, g, b = tonumber(r, base), tonumber(g, base), tonumber(b, base)
+
+    local x1 = x + self:get_col_x_offset(idx, s)
+    local x2 = x + self:get_col_x_offset(idx, e + 1)
+    local oy = self:get_line_text_y_offset()
+
+    local text_color = math.max(r, g, b) < 128 and white or black
+    tmp[1], tmp[2], tmp[3], tmp[4] = r, g, b, nil
+
+    local l1, _, l2, _ = self.doc:get_selection(true)
+
+    if not (self.doc:has_selection() and idx >= l1 and idx <= l2) then
+      renderer.draw_rect(x1, y, x2 - x1, self:get_line_height(), tmp)
+      renderer.draw_text(self:get_font(), str, x1, y + oy, text_color)
+    else
+      tmp[4] = 58
+      renderer.draw_rect(x1, y, x2 - x1, self:get_line_height(), tmp)
+    end
+  end
+end
+
+
+local draw_line_text = DocView.draw_line_text
+
+function DocView:draw_line_text(idx, x, y)
+  draw_line_text(self, idx, x, y)
+  draw_color_previews(self, idx, x, y, "#(%x%x)(%x%x)(%x%x)%f[%X]",        16)
+  draw_color_previews(self, idx, x, y, "rgba?%((%d+)%D+(%d+)%D+(%d+).-%)", 10)
+end
+