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-rw-r--r--runtime/doc/api.txt30
1 files changed, 23 insertions, 7 deletions
diff --git a/runtime/doc/api.txt b/runtime/doc/api.txt
index 3d95dd58f7..22ad8e0633 100644
--- a/runtime/doc/api.txt
+++ b/runtime/doc/api.txt
@@ -14,8 +14,9 @@ Applications can also embed libnvim to work with the C API directly.
Type |gO| to see the table of contents.
==============================================================================
-API Types *api-types*
+API Definitions *api-definitions*
+ *api-types*
The Nvim C API defines custom types for all function parameters. Some are just
typedefs around C99 standard types, others are Nvim-defined data structures.
@@ -34,6 +35,17 @@ discriminated as separate types in an Object:
Window -> enum value kObjectTypeWindow
Tabpage -> enum value kObjectTypeTabpage
+ *api-indexing*
+Most of the API uses 0-based indices, and ranges are end-exclusive. For the
+end of a range, -1 denotes the last line/column.
+
+Exception: the following API functions use "mark-like" indexing (1-based
+lines, 0-based columns):
+
+ |nvim_buf_get_mark()|
+ |nvim_win_get_cursor()|
+ |nvim_win_set_cursor()|
+
==============================================================================
API metadata *api-metadata*
@@ -1293,7 +1305,7 @@ nvim_buf_set_lines({buffer}, {start}, {end}, {strict_indexing},
{replacement} Array of lines to use as replacement
nvim_buf_get_offset({buffer}, {index}) *nvim_buf_get_offset()*
- Returns the byte offset for a line.
+ Returns the byte offset of a line (0-indexed). |api-indexing|
Line 1 (index=0) has offset 0. UTF-8 bytes are counted. EOL is
one byte. 'fileformat' and 'fileencoding' are ignored. The
@@ -1445,7 +1457,9 @@ nvim_buf_is_valid({buffer}) *nvim_buf_is_valid()*
nvim_buf_get_mark({buffer}, {name}) *nvim_buf_get_mark()*
Return a tuple (row,col) representing the position of the
- named mark
+ named mark.
+
+ Marks are (1,0)-indexed. |api-indexing|
Parameters: ~
{buffer} Buffer handle, or 0 for current buffer
@@ -1500,8 +1514,8 @@ nvim_buf_clear_namespace({buffer}, {ns_id}, {line_start}, {line_end})
Clears namespaced objects, highlights and virtual text, from a
line range
- To clear the namespace in the entire buffer, pass in 0 and -1
- to line_start and line_end respectively.
+ Lines are 0-indexed. |api-indexing| To clear the namespace in
+ the entire buffer, specify line_start=0 and line_end=-1.
Parameters: ~
{buffer} Buffer handle, or 0 for current buffer
@@ -1570,7 +1584,8 @@ nvim_win_set_buf({window}, {buffer}) *nvim_win_set_buf()*
{buffer} Buffer handle
nvim_win_get_cursor({window}) *nvim_win_get_cursor()*
- Gets the cursor position in the window
+ Gets the (1,0)-indexed cursor position in the window.
+ |api-indexing|
Parameters: ~
{window} Window handle
@@ -1579,7 +1594,8 @@ nvim_win_get_cursor({window}) *nvim_win_get_cursor()*
(row, col) tuple
nvim_win_set_cursor({window}, {pos}) *nvim_win_set_cursor()*
- Sets the cursor position in the window
+ Sets the (1,0)-indexed cursor position in the window.
+ |api-indexing|
Parameters: ~
{window} Window handle