workspacerules: Add new optional "default command" for auto-launching apps on new workspaces (#3559)

src/helpers/MiscFunctions.cpp

@@ -2,6 +2,7 @@
 #include "../defines.hpp"
 #include <algorithm>
 #include "../Compositor.hpp"
+#include <optional>
 #include <set>
 #include <sys/utsname.h>
 #include <iomanip>
@@ -503,6 +504,43 @@ int getWorkspaceIDFromString(const std::string& in, std::string& outName) {
     return result;
 }
 
+std::optional<std::string> cleanCmdForWorkspace(const std::string& inWorkspaceName, std::string dirtyCmd) {
+
+    std::string cmd = removeBeginEndSpacesTabs(dirtyCmd);
+
+    if (!cmd.empty()) {
+        std::string       rules;
+        const std::string workspaceRule = "workspace " + inWorkspaceName;
+
+        if (cmd[0] == '[') {
+            const int closingBracketIdx = cmd.find_last_of(']');
+            auto      tmpRules          = cmd.substr(1, closingBracketIdx - 1);
+            cmd                         = cmd.substr(closingBracketIdx + 1);
+
+            auto rulesList = CVarList(tmpRules, 0, ';');
+
+            bool hadWorkspaceRule = false;
+            rulesList.map([&](std::string& rule) {
+                if (rule.find("workspace") == 0) {
+                    rule             = workspaceRule;
+                    hadWorkspaceRule = true;
+                }
+            });
+
+            if (!hadWorkspaceRule)
+                rulesList.append(workspaceRule);
+
+            rules = "[" + rulesList.join(";") + "]";
+        } else {
+            rules = "[" + workspaceRule + "]";
+        }
+
+        return std::optional<std::string>(rules + " " + cmd);
+    }
+
+    return std::nullopt;
+}
+
 float vecToRectDistanceSquared(const Vector2D& vec, const Vector2D& p1, const Vector2D& p2) {
     const float DX = std::max({0.0, p1.x - vec.x, vec.x - p2.x});
     const float DY = std::max({0.0, p1.y - vec.y, vec.y - p2.y});
@@ -594,8 +632,8 @@ int64_t getPPIDof(int64_t pid) {
 
     return 0;
 #else
-    std::string dir = "/proc/" + std::to_string(pid) + "/status";
-    FILE*       infile;
+    std::string       dir     = "/proc/" + std::to_string(pid) + "/status";
+    FILE*             infile;
 
     infile = fopen(dir.c_str(), "r");
     if (!infile)

src/helpers/MiscFunctions.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <optional>
 #include <string>
 #include <wayland-server.h>
 #include <wlr/util/box.h>
@@ -20,6 +21,7 @@ std::string                      removeBeginEndSpacesTabs(std::string);
 bool                             isNumber(const std::string&, bool allowfloat = false);
 bool                             isDirection(const std::string&);
 int                              getWorkspaceIDFromString(const std::string&, std::string&);
+std::optional<std::string>       cleanCmdForWorkspace(const std::string&, std::string);
 float                            vecToRectDistanceSquared(const Vector2D& vec, const Vector2D& p1, const Vector2D& p2);
 void                             logSystemInfo();
 std::string                      execAndGet(const char*);

src/helpers/VarList.hpp

@@ -1,4 +1,5 @@
 #pragma once
+#include <functional>
 #include <vector>
 #include <string>
 #include "../macros.hpp"
@@ -20,6 +21,15 @@ class CVarList {
 
     std::string join(const std::string& joiner, size_t from = 0, size_t to = 0) const;
 
+    void        map(std::function<void(std::string&)> func) {
+        for (auto& s : m_vArgs)
+            func(s);
+    }
+
+    void append(const std::string arg) {
+        m_vArgs.emplace_back(arg);
+    }
+
     std::string operator[](const size_t& idx) const {
         if (idx >= m_vArgs.size())
             return "";

src/helpers/Workspace.hpp

@@ -4,8 +4,7 @@
 #include <string>
 #include "../defines.hpp"
 
-enum eFullscreenMode : int8_t
-{
+enum eFullscreenMode : int8_t {
     FULLSCREEN_INVALID = -1,
     FULLSCREEN_FULL    = 0,
     FULLSCREEN_MAXIMIZED
@@ -53,6 +52,9 @@ class CWorkspace {
     // last monitor (used on reconnect)
     std::string m_szLastMonitor = "";
 
+    // Whether the user configured command for on-created-empty has been executed, if any
+    bool        m_bOnCreatedEmptyExecuted = false;
+
     void        startAnim(bool in, bool left, bool instant = false);
     void        setActive(bool on);