Command palette - part 1

src/gui/commandPalette.cpp

@@ -0,0 +1,115 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2023 tildearrow and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "gui.h"
+#include "guiConst.h"
+#include "misc/cpp/imgui_stdlib.h"
+#include <fmt/printf.h>
+#include <algorithm>
+#include <cctype>
+#include "../ta-log.h"
+
+static std::vector<int> paletteItems;
+
+static inline bool matchFuzzy(const char* haystack, const char* needle) {
+  // TODO: case insensitivity
+  size_t h_i=0; // haystack idx
+  size_t n_i=0; // needle idx
+  while (needle[n_i]!='\0') {
+    for (; std::tolower(haystack[h_i])!=std::tolower(needle[n_i]); h_i++) {
+      if (haystack[h_i]=='\0')
+        return false;
+    }
+    n_i+=1;
+  }
+  return true;
+}
+
+void FurnaceGUI::drawPalette() {
+  bool accepted=false;
+
+  if (paletteFirstFrame) {
+    paletteItems.clear();
+    for (int i=0; i<GUI_ACTION_MAX; i++) {
+      paletteItems.push_back(i);
+    }
+  }
+
+  if (paletteFirstFrame)
+    ImGui::SetKeyboardFocusHere();
+
+  ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+
+  if (ImGui::InputTextWithHint("##CommandPaletteSearch","Search...",&paletteQuery) || paletteFirstFrame) {
+    paletteSearchResults.clear();
+    paletteSearchResults.reserve(paletteItems.size());
+    for (int entry: paletteItems) {
+      if (guiActions[entry].defaultBind==-1) continue;
+      if (matchFuzzy(guiActions[entry].friendlyName, paletteQuery.c_str())) {
+        paletteSearchResults.push_back(entry);
+      }
+    }
+  }
+
+  if (ImGui::BeginChild("CommandPaletteList",ImVec2(312,216),false,0)) {
+    bool navigated=false;
+    if (ImGui::IsKeyPressed(ImGuiKey_UpArrow) && curPaletteChoice>0) {
+      curPaletteChoice-=1;
+      navigated=true;
+    }
+    if (ImGui::IsKeyPressed(ImGuiKey_DownArrow)) {
+      curPaletteChoice+=1;
+      navigated=true;
+    }
+
+    for (size_t i=0; i<paletteSearchResults.size(); i++) {
+      bool current=(i==curPaletteChoice);
+      int id=paletteSearchResults[i];
+
+      if (ImGui::Selectable(guiActions[id].friendlyName, current)) {
+        curPaletteChoice=i;
+        accepted=true;
+      }
+      if (navigated && current) ImGui::SetScrollHereY();
+    }
+  }
+  ImGui::EndChild();
+
+  if (!accepted) {
+    if (curPaletteChoice>=paletteSearchResults.size()) {
+      curPaletteChoice=paletteSearchResults.size()-1;
+    }
+    if (ImGui::IsKeyPressed(ImGuiKey_Enter)) {
+      accepted=true;
+    }
+  }
+
+  if (ImGui::Button("Cancel") || ImGui::IsKeyPressed(ImGuiKey_Escape)) {
+    ImGui::CloseCurrentPopup();
+  }
+
+  if (accepted) {
+    int action=paletteSearchResults[curPaletteChoice];
+    logD("Chose: %s", guiActions[action].friendlyName);
+    doAction(action);
+    ImGui::CloseCurrentPopup();
+  }
+
+  paletteFirstFrame=false;
+}