added better code faq

pages/Contributing and Debugging/PR-Guidelines.md

@@ -0,0 +1,64 @@
+## PR Requirements
+
+- Clean, not hacky code
+- Described changes and *why* they were there
+- Following the style (see below)
+
+## Code Style
+
+Hyprland's code style:
+```cpp
+void myFunction(int arg) {
+
+    if (shortStatement)
+        doSomething();
+    else
+        doNotDoIt();
+
+    switch (value) {
+        case 1:
+        { // braces optional
+            blahBlah();
+            break;
+        }
+        default:
+            Debug::log(ERR, "error");
+            break;
+    }
+
+    const auto CONSTVALUE = arg == 1 ? 2 : 3;
+
+    void* pLocalPointer = nullptr;
+
+    int localValue = 0;
+
+    if (MY && VERY && LONG && IF && STATEMENT && OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO && SUPERLONG && STATEMENT) {
+        ; // blank
+    }
+}
+
+class myClass {
+public:
+    int         m_iMyLocalInt = 0;
+    //          ^ member
+    //            ^ int
+    //              ^ camel name
+
+    void        classFunction(int, int, bool defaultBool = false);
+    //                          ^ most arg names omitted
+    //                                          ^ arg name mandatory here because C++
+
+    //          Note: omitting args only for functions with clear / few args. For long functions:
+    void        classFunctionLong(int a, int b, bool sure, bool red, bool enabled, void* item, const CColor& color = {0});
+}
+```
+
+## Some code FAQ
+
+> Why is the config variable getting so weird?
+
+Every variable from the config needs to be found in a hashmap. To limit the amount of hashmap searches, getting a config option looks like this:
+```cpp
+static auto *const PFOLLOWMOUSE = &g_pConfigManager->getConfigValuePtr("input:follow_mouse")->intValue;
+```
+Since the hashmap *cannot* be mutated during runtime, this pointer will always be valid, and will not require hashmap lookups every single time it's read.

pages/Contributing and Debugging/_index.md

@@ -1,12 +1,6 @@
 # Contributing guidelines
 
-For PRs, make sure that you:
-
-- follow the code style
-- don't write "hacky" code
-- check and test the code
-- are contributing something useful
-- explain your PR as best as you can
+PR, code styling and code FAQs are [here](./PR-Guidelines)
 
 For issues, please see
 [the guidelines](https://github.com/hyprwm/Hyprland/blob/main/docs/ISSUE_GUIDELINES.md)
@@ -17,8 +11,6 @@ For issues, please see
 
 `xcb` stuff, check with your local package provider.
 
-`wlroots-git` - always have the latest wlroots.
-
 `wayland` - of course.
 
 *Arch*:
@@ -50,6 +42,12 @@ Also, before the first build (or after some updates, possibly)
 need to `make config`.)
 {{< /hint >}}
 
+{{< hint type=warning >}}
+`make config` will overwrite wlroots headers in `/usr/`,
+meaning you'll be unable to build any other wlroots compositor
+without a wlroots reinstall.
+{{< /hint >}}
+
 # Running
 
 when running Hyprland in Debug mode, the config is