Support ability to match by regex

Cargo.toml

@@ -10,3 +10,4 @@ strip = true
 argh = "0.1"
 anyhow = "1.0"
 miniserde = "0.1"
+regex = "1"

README.md

@@ -6,16 +6,54 @@ it will launch new window.
 
 ```
 $ raise
-Usage: raise -c <class> -e <launch>
+Usage: raise [-c <class>] [--tag <tag>] [--xdgtag <tag>] -e <launch> [-m <field[:method]=pattern>...]
 
 Raise window if it exists, otherwise launch new window.
 
 Options:
-  -c, --class       class to focus
+  -c, --class       class to focus (shorthand for `--match class=...`)
+      --tag         window tag to match (repeatable; shorthand for `--match tag=...`)
+      --xdgtag      XDG surface tag to match (repeatable; shorthand for `--match xdgtag=...`)
   -e, --launch      command to launch
+  -m, --match       additional matcher in the form field[:method]=pattern
   --help            display usage information
 ```
 
+### Matching
+
+The `--match` flag allows choosing how a window should be selected. Each
+matcher uses the format `field[:method]=pattern` and multiple matchers can be
+combined; they all have to match for a window to qualify.
+
+Supported fields:
+- `class` — current window class reported by Hyprland
+- `initial-class` — class when the window was first created
+- `title` — current window title
+- `initial-title` — original title assigned on window creation
+- `tag` — window tag assigned via dynamic tags
+- `xdgtag` — XDG surface tag (`xdgTag` in `hyprctl clients`)
+
+Aliases: you can also use the short forms `c`, `initialClass`, `initialTitle`, and `xdg-tag`.
+
+Supported methods (default is `equals`):
+- `equals` / `eq`
+- `contains` / `substr`
+- `prefix` / `starts-with`
+- `suffix` / `ends-with`
+- `regex` / `re`
+
+Examples:
+
+```
+raise --launch firefox --match class=firefox
+raise --launch alacritty --match title:contains=notes
+raise --launch slack --match class=Slack --match title:regex="(?i)daily"
+# Shorthands for tags:
+raise --launch floorp --tag web
+raise --launch mpv --tag vid
+raise --launch obsidian --tag notes
+```
+
 ## Install `raise`
 
 There are multiple ways to install this: