config: Config error limit/hyprctl (#5165)

* Add error_limit to limit the number of config error messages shown in notification

* Add configerrors hyprctl command

* Formatting

* Formatting for not my code

* Use CVarList, add escapeJSONStrings

* Add indication there are more undisplayed errors

* Restore suppress_errors; move getErrors() to ConfigManager

* Formatting, wtf

* Format

src/config/ConfigManager.cpp

@@ -372,6 +372,7 @@ CConfigManager::CConfigManager() {
     m_pConfig->addConfigValue("debug:damage_tracking", {(Hyprlang::INT)DAMAGE_TRACKING_FULL});
     m_pConfig->addConfigValue("debug:manual_crash", Hyprlang::INT{0});
     m_pConfig->addConfigValue("debug:suppress_errors", Hyprlang::INT{0});
+    m_pConfig->addConfigValue("debug:error_limit", Hyprlang::INT{5});
     m_pConfig->addConfigValue("debug:watchdog_timeout", Hyprlang::INT{5});
     m_pConfig->addConfigValue("debug:disable_scale_checks", Hyprlang::INT{0});
 
@@ -609,6 +610,10 @@ std::string CConfigManager::getMainConfigPath() {
     return getConfigDir() + "/hypr/" + (ISDEBUG ? "hyprlandd.conf" : "hyprland.conf");
 }
 
+std::string CConfigManager::getErrors() {
+    return m_szConfigErrors;
+}
+
 void CConfigManager::reload() {
     EMIT_HOOK_EVENT("preConfigReload", nullptr);
     setDefaultAnimationVars();
@@ -740,6 +745,12 @@ void CConfigManager::postConfigReload(const Hyprlang::CParseResult& result) {
         g_pHyprOpenGL->m_bReloadScreenShader = true;
 
     // parseError will be displayed next frame
+
+    if (result.error)
+        m_szConfigErrors = result.getError();
+    else
+        m_szConfigErrors = "";
+
     if (result.error && !std::any_cast<Hyprlang::INT>(m_pConfig->getConfigValue("debug:suppress_errors")))
         g_pHyprError->queueCreate(result.getError(), CColor(1.0, 50.0 / 255.0, 50.0 / 255.0, 1.0));
     else if (std::any_cast<Hyprlang::INT>(m_pConfig->getConfigValue("autogenerated")) == 1)

src/config/ConfigManager.hpp

@@ -142,6 +142,7 @@ class CConfigManager {
     void                      addExecRule(const SExecRequestedRule&);
 
     void                      handlePluginLoads();
+    std::string               getErrors();
 
     // keywords
     std::optional<std::string> handleRawExec(const std::string&, const std::string&);
@@ -193,6 +194,7 @@ class CConfigManager {
     std::deque<std::string>                                   firstExecRequests;
 
     std::vector<std::pair<std::string, std::string>>          m_vFailedPluginConfigValues; // for plugin values of unloaded plugins
+    std::string                                               m_szConfigErrors = "";
 
     // internal methods
     void                       setAnimForChildren(SAnimationPropertyConfig* const);

src/debug/HyprCtl.cpp

@@ -17,6 +17,7 @@
 
 #include "../config/ConfigValue.hpp"
 #include "../managers/CursorManager.hpp"
+#include "../hyprerror/HyprError.hpp"
 
 static void trimTrailingComma(std::string& str) {
     if (!str.empty() && str.back() == ',')
@@ -497,6 +498,29 @@ std::string layoutsRequest(eHyprCtlOutputFormat format, std::string request) {
     return result;
 }
 
+std::string configErrorsRequest(eHyprCtlOutputFormat format, std::string request) {
+    std::string result     = "";
+    std::string currErrors = g_pConfigManager->getErrors();
+    CVarList    errLines(currErrors, 0, '\n');
+    if (format == eHyprCtlOutputFormat::FORMAT_JSON) {
+        result += "[";
+        for (auto line : errLines) {
+            result += std::format(
+                R"#(
+	"{}",)#",
+
+                escapeJSONStrings(line));
+        }
+        trimTrailingComma(result);
+        result += "\n]\n";
+    } else {
+        for (auto line : errLines) {
+            result += std::format("{}\n", line);
+        }
+    }
+    return result;
+}
+
 std::string devicesRequest(eHyprCtlOutputFormat format, std::string request) {
     std::string result = "";
 
@@ -1531,6 +1555,7 @@ CHyprCtl::CHyprCtl() {
     registerCommand(SHyprCtlCommand{"animations", true, animationsRequest});
     registerCommand(SHyprCtlCommand{"rollinglog", true, rollinglogRequest});
     registerCommand(SHyprCtlCommand{"layouts", true, layoutsRequest});
+    registerCommand(SHyprCtlCommand{"configerrors", true, configErrorsRequest});
 
     registerCommand(SHyprCtlCommand{"monitors", false, monitorsRequest});
     registerCommand(SHyprCtlCommand{"reload", false, reloadRequest});

src/hyprerror/HyprError.cpp

@@ -1,5 +1,6 @@
 #include "HyprError.hpp"
 #include "../Compositor.hpp"
+#include "../config/ConfigValue.hpp"
 
 CHyprError::CHyprError() {
     m_fFadeOpacity.create(AVARTYPE_FLOAT, g_pConfigManager->getAnimationPropertyConfig("fadeIn"), nullptr, AVARDAMAGE_NONE);
@@ -58,6 +59,10 @@ void CHyprError::createQueued() {
     cairo_restore(CAIRO);
 
     const auto   LINECOUNT = 1 + std::count(m_szQueued.begin(), m_szQueued.end(), '\n');
+    static auto  LINELIMIT = CConfigValue<Hyprlang::INT>("debug:error_limit");
+
+    const auto   VISLINECOUNT = std::min(LINECOUNT, *LINELIMIT);
+    const auto   EXTRALINES   = (VISLINECOUNT < LINECOUNT) ? 1 : 0;
 
     const double DEGREES = M_PI / 180.0;
 
@@ -66,7 +71,7 @@ void CHyprError::createQueued() {
     const double X      = PAD;
     const double Y      = PAD;
     const double WIDTH  = PMONITOR->vecPixelSize.x - PAD * 2;
-    const double HEIGHT = (FONTSIZE + 2 * (FONTSIZE / 10.0)) * LINECOUNT + 3;
+    const double HEIGHT = (FONTSIZE + 2 * (FONTSIZE / 10.0)) * (VISLINECOUNT + EXTRALINES) + 3;
     const double RADIUS = PAD > HEIGHT / 2 ? HEIGHT / 2 - 1 : PAD;
 
     m_bDamageBox = {0, 0, (int)PMONITOR->vecPixelSize.x, (int)HEIGHT + (int)PAD * 2};
@@ -91,8 +96,9 @@ void CHyprError::createQueued() {
     cairo_set_font_size(CAIRO, FONTSIZE);
     cairo_set_source_rgba(CAIRO, textColor.r, textColor.g, textColor.b, textColor.a);
 
-    float yoffset = FONTSIZE;
-    while (m_szQueued != "") {
+    float yoffset     = FONTSIZE;
+    int   renderedcnt = 0;
+    while (m_szQueued != "" && renderedcnt < VISLINECOUNT) {
         std::string current = m_szQueued.substr(0, m_szQueued.find('\n'));
         if (const auto NEWLPOS = m_szQueued.find('\n'); NEWLPOS != std::string::npos)
             m_szQueued = m_szQueued.substr(NEWLPOS + 1);
@@ -101,7 +107,14 @@ void CHyprError::createQueued() {
         cairo_move_to(CAIRO, PAD + 1 + RADIUS, yoffset + PAD + 1);
         cairo_show_text(CAIRO, current.c_str());
         yoffset += FONTSIZE + (FONTSIZE / 10.f);
+        renderedcnt++;
     }
+    if (VISLINECOUNT < LINECOUNT) {
+        std::string moreString = std::format("({} more...)", LINECOUNT - VISLINECOUNT);
+        cairo_move_to(CAIRO, PAD + 1 + RADIUS, yoffset + PAD + 1);
+        cairo_show_text(CAIRO, moreString.c_str());
+    }
+    m_szQueued = "";
 
     cairo_surface_flush(CAIROSURFACE);