Move folder

include/editor/hooks.h

@@ -0,0 +1,91 @@
+#ifndef EDITOR_HOOKS_H
+#define EDITOR_HOOKS_H
+
+#include "utils/utils.h"
+
+struct HookEngine {
+  uint32_t hooks[94];
+  std::vector<std::pair<uint32_t, char>> v;
+  std::vector<std::pair<uint32_t, char>>::iterator it;
+
+  HookEngine() {
+    for (int i = 0; i < 94; i++)
+      hooks[i] = UINT32_MAX;
+    v.reserve(94);
+  }
+
+  inline void edit(uint32_t line, uint32_t removed_rows,
+                   uint32_t inserted_rows) {
+
+    int64_t delta = (int64_t)inserted_rows - (int64_t)removed_rows;
+    for (int i = 0; i < 94; i++) {
+      uint32_t &h = hooks[i];
+      if (h == UINT32_MAX)
+        continue;
+      if (h < line)
+        continue;
+      if (removed_rows > 0 && h < line + removed_rows) {
+        h = UINT32_MAX;
+        continue;
+      }
+      h = (uint32_t)((int64_t)h + delta);
+    }
+  }
+
+  inline void set(char c, uint32_t line) {
+    if (c < '!' || c > '~')
+      return;
+    int idx = c - '!';
+    for (int i = 0; i < 94; i++) {
+      if (hooks[i] == line) {
+        hooks[i] = UINT32_MAX;
+        break;
+      }
+    }
+    hooks[idx] = line;
+  }
+
+  inline bool get(char c, uint32_t *out_line) const {
+    if (c < '!' || c > '~')
+      return false;
+    uint32_t h = hooks[c - '!'];
+    if (h == UINT32_MAX)
+      return false;
+    *out_line = h;
+    return true;
+  }
+
+  inline void clear_line(uint32_t line) {
+    for (int i = 0; i < 94; i++)
+      if (hooks[i] == line)
+        hooks[i] = UINT32_MAX;
+  }
+
+  inline void clear(char c) {
+    if (c < '!' || c > '~')
+      return;
+    hooks[c - '!'] = UINT32_MAX;
+  }
+
+  void start_iter(uint32_t scroll_line) {
+    for (int i = 0; i < 94; i++)
+      if (hooks[i] != UINT32_MAX)
+        v.push_back({hooks[i], (char)('!' + i)});
+    std::sort(v.begin(), v.end(),
+              [](const auto &a, const auto &b) { return a.first < b.first; });
+    it = std::lower_bound(
+        v.begin(), v.end(), scroll_line,
+        [](const auto &p, uint32_t line) { return p.first < line; });
+  }
+
+  char next(uint32_t line_index) {
+    if (it != v.end() && it->first == line_index) {
+      char c = it->second;
+      it++;
+      return c;
+    }
+    return '\0';
+  }
+};
+
+#endif