diff --git a/lua/argonaut/param.lua b/lua/argonaut/param.lua
index 53e3b31..d3aa0b2 100644
--- a/lua/argonaut/param.lua
+++ b/lua/argonaut/param.lua
@@ -1,30 +1,28 @@
 ParamCursorCell = require('argonaut.param_cursor_cell')
 ParamRangeCell = require('argonaut.param_range_cell')
 
-local Param = {}
+local Param = {type = 'param'}
 Param.__index = Param
 
 function Param.new(range, index, cells)
-    local param = {range = range, index = index, cells = cells or {}}
+    local param = {
+        range = range,
+        index = index,
+        cells = cells or {},
+    }
+
     return setmetatable(param, Param)
 end
 
-function Param.new_cursor_cell(cursor)
-    return ParamCursorCell.new(cursor)
-end
-
-function Param.new_range_cell(range)
-    return ParamRangeCell.new(range)
-end
-
-function Param:append(cell)
-    table.insert(self.cells, cell)
+function Param:write(builder, wrapped)
+    for i = self:get_start_index(), self:get_stop_index() do
+        self.cells[i]:write(builder, wrapped)
+    end
 end
 
 function Param:hit_test(cursor)
+    -- skip cursor over spaces on the left
     local start_index = self:get_start_index()
-    local stop_index = self:get_stop_index()
-
     for i = 1, start_index - 1, 1 do
         local cell = self.cells[i]
         if cell:hit_test(cursor) then
@@ -32,6 +30,8 @@ function Param:hit_test(cursor)
         end
     end
 
+    -- skip cursor over spaces on the right
+    local stop_index = self:get_stop_index()
     for i = #self.cells, stop_index + 1, -1 do
         local cell = self.cells[i]
         if cell:hit_test(cursor) then
@@ -43,7 +43,7 @@ function Param:hit_test(cursor)
         local trace = cell:hit_test(cursor)
         if trace then
             table.insert(trace, 1, {
-                type = 'param',
+                type = self.type,
                 cell_count = #self.cells,
                 cell_index = i - start_index + 1,
             })
@@ -55,21 +55,31 @@ end
 
 function Param:hit_search(trace, depth)
     local frame = trace[depth]
-    assert(frame.type == 'param')
+    assert(frame.type == self.type)
 
     if depth == #trace then
         return self
     else
-        local index_clamped = frame.cell_index + self:get_start_index() - 1
-        assert(index_clamped <= #self.cells)
-        return self.cells[index_clamped]:hit_search(trace, depth + 1)
+        local unpadded_index = frame.cell_index + self:get_start_index() - 1
+        assert(unpadded_index <= #self.cells)
+        return self.cells[unpadded_index]:hit_search(trace, depth + 1)
     end
 end
 
-function Param:write(builder, wrapped)
-    for i = self:get_start_index(), self:get_stop_index() do
-        self.cells[i]:write(builder, wrapped)
+function Param:is_empty()
+    return self:get_start_index() == nil
+end
+
+function Param:is_contiguous()
+    for i = self:get_start_index(), self:get_stop_index() - 1 do
+        local cell = self.cells[i]
+        local next_cell = self.cells[i + 1]
+        if cell:get_stop_cursor().row ~= next_cell:get_start_cursor().row then
+            return false
+        end
     end
+
+    return true
 end
 
 function Param:is_before_cursor(cursor)
@@ -84,18 +94,6 @@ function Param:is_after_cursor(cursor)
     end
 end
 
-function Param:get_previous()
-    if self.index > 1 then
-        return self.range.params[self.index - 1]
-    end
-end
-
-function Param:get_next()
-    if self.index < #self.range.params then
-        return self.range.params[self.index + 1]
-    end
-end
-
 function Param:get_start_cursor()
     if #self.cells > 0 then
         return self.cells[1]:get_start_cursor()
@@ -108,6 +106,18 @@ function Param:get_stop_cursor()
     end
 end
 
+function Param:get_previous()
+    if self.index > 1 then
+        return self.range.params[self.index - 1]
+    end
+end
+
+function Param:get_next()
+    if self.index < #self.range.params then
+        return self.range.params[self.index + 1]
+    end
+end
+
 function Param:get_start_index()
     for i = 1, #self.cells do
         if not self.cells[i]:is_empty() then
@@ -124,34 +134,6 @@ function Param:get_stop_index()
     end
 end
 
-function Param:is_contiguous()
-    local start_index = self:get_start_index()
-    local stop_index = self:get_stop_index()
-
-    for i = start_index, stop_index - 1 do
-        local cell = self.cells[i]
-        local next_cell = self.cells[i + 1]
-        if cell:get_stop_cursor().row ~= next_cell:get_start_cursor().row then
-            return false
-        end
-    end
-
-    return true
-end
-
-function Param:is_wrapped()
-    local previous_param = self:get_previous()
-    if previous_param then
-        return previous_param:get_stop_cursor().row ~= self:get_start_cursor().row
-    else
-        return self.range.start_cursor.row ~= self:get_start_cursor().row
-    end
-end
-
-function Param:is_empty()
-    return self:get_start_index() == nil
-end
-
 function Param:select(inner)
     if #self.cells == 0 then
         return
@@ -190,4 +172,16 @@ function Param:select(inner)
     stop_cursor:set_current()
 end
 
+function Param.new_cursor_cell(cursor)
+    return ParamCursorCell.new(cursor)
+end
+
+function Param.new_range_cell(range)
+    return ParamRangeCell.new(range)
+end
+
+function Param:append_cell(cell)
+    table.insert(self.cells, cell)
+end
+
 return Param
diff --git a/lua/argonaut/param_cursor_cell.lua b/lua/argonaut/param_cursor_cell.lua
index 7fc9c3b..532288b 100644
--- a/lua/argonaut/param_cursor_cell.lua
+++ b/lua/argonaut/param_cursor_cell.lua
@@ -1,4 +1,4 @@
-local ParamCursorCell = {}
+local ParamCursorCell = {type = 'param_cursor_cell'}
 ParamCursorCell.__index = ParamCursorCell
 
 function ParamCursorCell.new(cursor)
@@ -6,25 +6,29 @@ function ParamCursorCell.new(cursor)
     return setmetatable(cell, ParamCursorCell)
 end
 
-function ParamCursorCell:write(builder)
+function ParamCursorCell:write(builder, _)
     builder:write(self.cursor:get_value())
 end
 
 function ParamCursorCell:hit_test(cursor)
     if self.cursor == cursor then
-        return {{char = self.cursor:get_value(), type = 'cursor_cell'}}
+        return {{char = self.cursor:get_value(), type = self.type}}
     end
 end
 
 function ParamCursorCell:hit_search(trace, depth)
     local frame = trace[depth]
-    assert(frame.type == 'cursor_cell')
+    assert(frame.type == self.type)
     assert(frame.char == self.cursor:get_value())
     assert(depth == #trace)
 
     return self
 end
 
+function ParamCursorCell:is_empty()
+    return not self.cursor:get_value():match('%S')
+end
+
 function ParamCursorCell:is_before_cursor(cursor)
     return self.cursor < cursor
 end
@@ -41,8 +45,4 @@ function ParamCursorCell:get_stop_cursor()
     return self.cursor
 end
 
-function ParamCursorCell:is_empty()
-    return not self.cursor:get_value():match('%S')
-end
-
 return ParamCursorCell
diff --git a/lua/argonaut/param_range_cell.lua b/lua/argonaut/param_range_cell.lua
index 2481294..01d8fe0 100644
--- a/lua/argonaut/param_range_cell.lua
+++ b/lua/argonaut/param_range_cell.lua
@@ -1,4 +1,4 @@
-local ParamRangeCell = {}
+local ParamRangeCell = {type = 'param_range_cell'}
 ParamRangeCell.__index = ParamRangeCell
 
 function ParamRangeCell.new(range)
@@ -13,11 +13,26 @@ end
 function ParamRangeCell:hit_test(cursor)
     local trace = self.range:hit_test(cursor)
     if trace then
-        table.insert(trace, 1, {type = 'range_cell'})
+        table.insert(trace, 1, {type = self.type})
         return trace
     end
 end
 
+function ParamRangeCell:hit_search(trace, depth)
+    local frame = trace[depth]
+    assert(frame.type == self.type)
+
+    if depth == #trace then
+        return self
+    else
+        return self.range:hit_search(trace, depth + 1)
+    end
+end
+
+function ParamRangeCell:is_empty()
+    return false
+end
+
 function ParamRangeCell:is_before_cursor(cursor)
     return self.range.start_cursor < cursor
 end
@@ -26,17 +41,6 @@ function ParamRangeCell:is_after_cursor(cursor)
     return self.range.stop_cursor > cursor
 end
 
-function ParamRangeCell:hit_search(trace, depth)
-    local frame = trace[depth]
-    assert(frame.type == 'range_cell')
-
-    if depth == #trace then
-        return self
-    else
-        return self.range:hit_search(trace, depth + 1)
-    end
-end
-
 function ParamRangeCell:get_start_cursor()
     return self.range.start_cursor
 end
@@ -45,8 +49,4 @@ function ParamRangeCell:get_stop_cursor()
     return self.range.stop_cursor
 end
 
-function ParamRangeCell:is_empty()
-    return false
-end
-
 return ParamRangeCell
diff --git a/lua/argonaut/range.lua b/lua/argonaut/range.lua
index 11f2b96..aef5f2e 100644
--- a/lua/argonaut/range.lua
+++ b/lua/argonaut/range.lua
@@ -3,7 +3,7 @@ local Options = require('argonaut.options')
 local Pairing = require('argonaut.pairing')
 local Param   = require('argonaut.param')
 
-local Range = {}
+local Range = {type = 'range'}
 Range.__index = Range
 
 local function find_closest_pair(pairing)
@@ -102,7 +102,7 @@ function Range:parse()
             param = Param.new(self, param_index)
             param_index = param_index + 1
         end
-        param:append(cell)
+        param:append_cell(cell)
     end
 
     local append_param = function()
@@ -143,7 +143,7 @@ function Range:hit_test(cursor)
     end
 
     local frame = {
-        type = 'range',
+        type = self.type,
         pairing = self.pairing.open .. self.pairing.close,
         param_count = #self.params,
         param_index = 0,
@@ -178,7 +178,7 @@ end
 
 function Range:hit_search(trace, depth)
     local frame = trace[depth]
-    assert(frame.type == 'range')
+    assert(frame.type == self.type)
     assert(frame.pairing == self.pairing.open .. self.pairing.close)
     assert(frame.param_count == #self.params)
     assert(frame.param_index <= #self.params)
@@ -267,7 +267,7 @@ function Range:write(builder, wrapped)
 end
 
 function Range:contains_cursor(cursor)
-    return cursor >= self.start_cursor and cursor <= self.stop_cursor
+    return cursor > self.start_cursor and cursor < self.stop_cursor
 end
 
 function Range:is_contiguous()
@@ -281,10 +281,13 @@ function Range:is_contiguous()
 end
 
 function Range:is_wrapped()
+    local previous_cursor = self.start_cursor
     for _, param in ipairs(self.params) do
-        if param:is_wrapped() then
+        local cursor = param:get_start_cursor()
+        if cursor.row ~= previous_cursor.row then
             return true
         end
+        previous_cursor = cursor
     end
 
     return false