docs(vi-mode): explaination for text objects (#13116)

plugins/vi-mode/README.md

@@ -46,7 +46,7 @@ hasn't been defined by theme, *Insert mode* is not displayed by default.
 
 You can change these indicators by setting the `MODE_INDICATOR` (*Normal mode*) and
 `INSERT_MODE_INDICATORS` (*Insert mode*) variables.
-This settings support Prompt Expansion sequences. For example:
+These settings support Prompt Expansion sequences. For example:
 
 ```zsh
 MODE_INDICATOR="%F{white}+%f"
@@ -157,6 +157,27 @@ NOTE: delete/kill commands (`dd`, `D`, `c{motion}`, `C`, `x`,`X`) and yank comma
 (`y`, `Y`) will copy to the clipboard. Contents can then be put back using paste commands
 (`P`, `p`).
 
+## Text objects
+
+Standard text objects are supported with `i` ("inside") and `a` ("around"), e.g., for words; thus, you can select the word the cursor is in with `viw`, or delete the current word, including surrounding spaces, with `daw`.
+
+For other text objects, you can rely on the built-in functionality of Zsh and enable it accordingly.
+For example, for quoted strings, you can copy the commented snippet of <https://sourceforge.net/p/zsh/code/ci/master/tree/Functions/Zle/select-quoted>: place this in your `.zsrhc` file, e.g., after sourcing oh-my-zsh:
+
+```sh
+autoload -U select-quoted
+zle -N select-quoted
+for m in visual viopp; do
+    for c in {a,i}{\',\",\`}; do
+        bindkey -M $m $c select-quoted
+    done
+done
+```
+
+Now, in normal mode, you can select everything inside a double-quoted string with `vi"`.
+Note that this works even if you're not already inside a quoted string.
+For example, you can replace everything inside a single-quoted string in the current line, from wherever the cursor is, with `ci'`.
+
 ## Known issues
 
 ### Low `$KEYTIMEOUT`