From b9bef6955487b75d13cfedd230bdc4adafedd115 Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Sat, 20 Dec 2025 22:16:13 +0000
Subject: Desktop/history: Move history to desktop (#12676)

---
 src/desktop/history/WorkspaceHistoryTracker.cpp | 158 ++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 src/desktop/history/WorkspaceHistoryTracker.cpp

(limited to 'src/desktop/history/WorkspaceHistoryTracker.cpp')

diff --git a/src/desktop/history/WorkspaceHistoryTracker.cpp b/src/desktop/history/WorkspaceHistoryTracker.cpp
new file mode 100644
index 00000000..bfedda13
--- /dev/null
+++ b/src/desktop/history/WorkspaceHistoryTracker.cpp
@@ -0,0 +1,158 @@
+#include "WorkspaceHistoryTracker.hpp"
+
+#include "../../helpers/Monitor.hpp"
+#include "../Workspace.hpp"
+#include "../../managers/HookSystemManager.hpp"
+#include "../../config/ConfigValue.hpp"
+
+using namespace Desktop;
+using namespace Desktop::History;
+
+SP<CWorkspaceHistoryTracker> History::workspaceTracker() {
+    static SP<CWorkspaceHistoryTracker> tracker = makeShared<CWorkspaceHistoryTracker>();
+    return tracker;
+}
+
+CWorkspaceHistoryTracker::CWorkspaceHistoryTracker() {
+    static auto P = g_pHookSystem->hookDynamic("workspace", [this](void* self, SCallbackInfo& info, std::any data) {
+        auto workspace = std::any_cast<PHLWORKSPACE>(data);
+        track(workspace);
+    });
+
+    static auto P1 = g_pHookSystem->hookDynamic("monitorAdded", [this](void* self, SCallbackInfo& info, std::any data) {
+        auto mon = std::any_cast<PHLMONITOR>(data);
+        track(mon);
+    });
+}
+
+CWorkspaceHistoryTracker::SMonitorData& CWorkspaceHistoryTracker::dataFor(PHLMONITOR mon) {
+    for (auto& ref : m_monitorDatas) {
+        if (ref.monitor != mon)
+            continue;
+
+        return ref;
+    }
+
+    return m_monitorDatas.emplace_back(SMonitorData{
+        .monitor = mon,
+    });
+}
+
+CWorkspaceHistoryTracker::SWorkspacePreviousData& CWorkspaceHistoryTracker::dataFor(PHLWORKSPACE ws) {
+    for (auto& ref : m_datas) {
+        if (ref.workspace != ws)
+            continue;
+
+        return ref;
+    }
+
+    return m_datas.emplace_back(SWorkspacePreviousData{
+        .workspace = ws,
+    });
+}
+
+void CWorkspaceHistoryTracker::track(PHLWORKSPACE w) {
+    if (!w->m_monitor)
+        return;
+
+    static auto PALLOWWORKSPACECYCLES = CConfigValue<Hyprlang::INT>("binds:allow_workspace_cycles");
+
+    auto&       data    = dataFor(w);
+    auto&       monData = dataFor(w->m_monitor.lock());
+
+    if (!monData.workspace) {
+        data.previous.reset();
+        data.previousID   = WORKSPACE_INVALID;
+        data.previousName = "";
+        return;
+    }
+
+    if (monData.workspace == w && !*PALLOWWORKSPACECYCLES) {
+        track(w->m_monitor.lock());
+        return;
+    }
+
+    data.previous     = monData.workspace;
+    data.previousName = monData.workspace->m_name;
+    data.previousID   = monData.workspace->m_id;
+    data.previousMon  = monData.workspace->m_monitor;
+
+    track(w->m_monitor.lock());
+}
+
+void CWorkspaceHistoryTracker::track(PHLMONITOR mon) {
+    auto& data         = dataFor(mon);
+    data.workspace     = mon->m_activeWorkspace;
+    data.workspaceName = mon->m_activeWorkspace ? mon->m_activeWorkspace->m_name : "";
+    data.workspaceID   = mon->activeWorkspaceID();
+}
+
+void CWorkspaceHistoryTracker::gc() {
+    std::erase_if(m_datas, [](const auto& e) { return !e.workspace; });
+    std::erase_if(m_monitorDatas, [](const auto& e) { return !e.monitor; });
+}
+
+const CWorkspaceHistoryTracker::SWorkspacePreviousData* CWorkspaceHistoryTracker::previousWorkspace(PHLWORKSPACE ws) {
+    gc();
+
+    for (const auto& d : m_datas) {
+        if (d.workspace != ws)
+            continue;
+        return &d;
+    }
+
+    return &dataFor(ws);
+}
+
+SWorkspaceIDName CWorkspaceHistoryTracker::previousWorkspaceIDName(PHLWORKSPACE ws) {
+    gc();
+
+    for (const auto& d : m_datas) {
+        if (d.workspace != ws)
+            continue;
+        return SWorkspaceIDName{.id = d.previousID, .name = d.previousName, .isAutoIDd = d.previousID <= 0};
+    }
+
+    auto& d = dataFor(ws);
+    return SWorkspaceIDName{.id = d.previousID, .name = d.previousName, .isAutoIDd = d.previousID <= 0};
+}
+
+const CWorkspaceHistoryTracker::SWorkspacePreviousData* CWorkspaceHistoryTracker::previousWorkspace(PHLWORKSPACE ws, PHLMONITOR restrict) {
+    if (!restrict)
+        return previousWorkspace(ws);
+
+    auto& data = dataFor(ws);
+    while (true) {
+
+        // case 1: previous exists
+        if (data.previous) {
+            if (data.previous->m_monitor != restrict) {
+                data = dataFor(data.previous.lock());
+                continue;
+            }
+
+            break;
+        }
+
+        // case 2: previous doesnt exist, but we have mon
+        if (data.previousMon) {
+            if (data.previousMon != restrict)
+                return nullptr;
+
+            break;
+        }
+
+        // case 3: no mon and no previous
+        return nullptr;
+    }
+
+    return &data;
+}
+
+SWorkspaceIDName CWorkspaceHistoryTracker::previousWorkspaceIDName(PHLWORKSPACE ws, PHLMONITOR restrict) {
+    const auto DATA = previousWorkspace(ws, restrict);
+    if (!DATA)
+        return SWorkspaceIDName{.id = WORKSPACE_INVALID};
+
+    return SWorkspaceIDName{.id = DATA->previousID, .name = DATA->previousName, .isAutoIDd = DATA->previousID <= 0};
+}
-- 
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