plugin: jump (relative indentations or emptylines)

runtime/plugins/jump/jump.lua

@@ -0,0 +1,114 @@
+AUTHOR = "shkschneider/macro"
+NAME = "jump"
+VERSION = "1.2.0"
+
+local micro = import("micro")
+local config = import("micro/config")
+local buffer = import("micro/buffer")
+
+function _HalfPage(bp, dir)
+    if dir > 0 then
+        bp:MoveCursorDown(bp:BufView().Height / 2)
+    elseif dir < 0 then
+        bp:MoveCursorUp(bp:BufView().Height / 2)
+    end
+end
+
+function _EmptyLine(bp, dir)
+    local c = bp.Cursor
+    local x, y = c.Loc.X, c.Loc.Y
+    local l, n = c.Loc.Y + dir, bp.Buf.LineArray:LinesNum()
+    while l >= 1 and l < n do
+        if l ~= y and #bp.Buf:Line(l):gsub("^%s+", "") == 0 then
+            bp:GotoLoc(buffer.Loc(x, l))
+            c:StartOfText()
+            return true
+        end
+        l = l + dir
+    end
+    c:GotoLoc(buffer.Loc(x, y))
+    return false
+end
+
+function _SameIndentation(bp, dir)
+    local c = bp.Cursor
+    c:StartOfText()
+    local x, y = c.Loc.X, c.Loc.Y
+    local l, n = c.Loc.Y + dir, bp.Buf.LineArray:LinesNum()
+    while l >= 1 and l < n do
+        c:GotoLoc(buffer.Loc(1, l))
+        c:StartOfText()
+        if l ~= y and c.Loc.X ~= x then
+            break
+        end
+        l = l + dir
+    end
+    while l >= 1 and l < n do
+        c:GotoLoc(buffer.Loc(1, l))
+        c:StartOfText()
+        if l ~= y and c.Loc.X == x then
+            c:GotoLoc(buffer.Loc(1, l))
+            bp:GotoLoc(buffer.Loc(x, l))
+            return true
+        end
+        l = l + dir
+    end
+    bp:GotoLoc(buffer.Loc(x, y))
+    return false
+end
+
+function _Jump(bp, dir)
+    bp.Cursor:Deselect(true)
+    if not _SameIndentation(bp, dir) then
+        if not _EmptyLine(bp, dir) then
+            _HalfPage(bp, dir)
+        end
+    end
+    bp.Cursor:StartOfText()
+    bp:Center()
+end
+
+function JumpAbove(bp, args)
+    if not bp.Cursor then return micro.InfoBar():Error("No cursor") end
+    _Jump(bp, -1)
+end
+
+function JumpBelow(bp, args)
+    if not bp.Cursor then return micro.InfoBar():Error("No cursor") end
+    _Jump(bp, 1)
+end
+
+function JumpRelative(bp, args)
+    if #args == 0 then return micro.InfoBar():Error("No target") end
+    local l, n = bp.Buf:LinesNum(), tonumber(args[1]:match("%d+"))
+    if args[1]:sub(-1) == "%" then
+        n = math.floor((n / 100) * l)
+    end
+    if not bp.Cursor then return micro.InfoBar():Error("No cursor") end
+    local y = bp.Cursor.Loc.Y
+    if args[1]:sub(1, 1) == "+" then
+        y = y + n
+    elseif args[1]:sub(1, 1) == "-" then
+        y = y - n
+    else
+        y = n
+    end
+    if y < 1 then y = 1 end
+    if y > l then y = l end
+    bp:GotoLoc(buffer.Loc(bp.Cursor.Loc.X, y))
+    bp.Cursor:Relocate()
+    micro.InfoBar():GutterMessage("Jumped to line " .. y)
+end
+
+function JumpRelativeComplete()
+    local t = { "1", "-10%", "50%", "+10%", "+99" }
+    return t, t
+end
+
+function init()
+    config.MakeCommand("jumpabove", JumpAbove, config.NoComplete)
+    config.TryBindKey("Ctrl-Up", "command:jumpabove", false)
+    config.MakeCommand("jumpbelow", JumpBelow, config.NoComplete)
+    config.TryBindKey("Ctrl-Down", "command:jumpbelow", false)
+    config.MakeCommand("jumprelative", JumpRelative, JumpRelativeComplete)
+end