initial commitmaster

4 files changed, 247 insertions, 0 deletions

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..e54cb03
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,120 @@
+---
+AccessModifierOffset: "-2"
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments:
+  Enabled: false
+  AcrossEmptyLines: false
+  AcrossComments: false
+  AlignCompound: false
+  AlignFunctionPointers: false
+  PadOperators: true
+AlignConsecutiveDeclarations:
+  Enabled: false
+  AcrossEmptyLines: false
+  AcrossComments: false
+  AlignCompound: false
+  AlignFunctionPointers: false
+  PadOperators: true
+AlignEscapedNewlines: LeftWithLastLine
+AlignTrailingComments: "true"
+AllowAllParametersOfDeclarationOnNextLine: "true"
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: "false"
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: "false"
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakTemplateDeclarations: "true"
+BinPackArguments: "true"
+BinPackParameters: "true"
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterClass: "true"
+  AfterControlStatement: "true"
+  AfterEnum: "true"
+  AfterFunction: "true"
+  AfterNamespace: "true"
+  AfterStruct: "true"
+  AfterUnion: "true"
+  AfterExternBlock: "true"
+  BeforeCatch: "true"
+  BeforeElse: "true"
+  IndentBraces: "false"
+  AfterCaseLabel: true
+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeInheritanceComma: "false"
+BreakConstructorInitializers: BeforeComma
+BreakStringLiterals: "true"
+ColumnLimit: "120"
+CompactNamespaces: "false"
+Cpp11BracedListStyle: "true"
+DerivePointerAlignment: "false"
+FixNamespaceComments: "true"
+IncludeBlocks: Regroup
+IncludeCategories:
+  - Regex: 'kapi/[[:alnum:]._\/]+\.hpp'
+    Priority: 100
+  - Regex: 'x86_64/[[:alnum:]._\/]+\.hpp'
+    Priority: 110
+  - Regex: '"[[:alnum:]._\/]+\.hpp"'
+    Priority: 300
+  - Regex: '<kstd/[[:alnum:]._\/]+>'
+    Priority: 400
+  - Regex: '<[[:alnum:]._\/]+\.hpp>'
+    Priority: 600
+  - Regex: '<[[:alnum:]._]+(?!\.(h|hpp))>'
+    Priority: 900
+IndentCaseLabels: "true"
+IndentPPDirectives: None
+IndentWidth: "2"
+KeepEmptyLinesAtTheStartOfBlocks: "false"
+Language: Cpp
+MaxEmptyLinesToKeep: "1"
+NamespaceIndentation: All
+PointerAlignment: Middle
+ReflowComments: "true"
+SortIncludes: "true"
+SortUsingDeclarations: "true"
+SpaceAfterCStyleCast: "false"
+SpaceAfterTemplateKeyword: "false"
+SpaceBeforeAssignmentOperators: "true"
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: "false"
+SpacesBeforeTrailingComments: "2"
+SpacesInAngles: "false"
+SpacesInContainerLiterals: "false"
+SpacesInCStyleCastParentheses: "false"
+SpacesInParentheses: "false"
+SpacesInSquareBrackets: "false"
+Standard: Latest
+TabWidth: "2"
+UseTab: Never
+AlignArrayOfStructures: Right
+AlignConsecutiveBitFields: {}
+AllowAllArgumentsOnNextLine: false
+AllowBreakBeforeNoexceptSpecifier: Never
+AllowShortCaseExpressionOnASingleLine: false
+AllowShortCompoundRequirementOnASingleLine: true
+AllowShortEnumsOnASingleLine: false
+AllowShortLambdasOnASingleLine: Inline
+BitFieldColonSpacing: Both
+BracedInitializerIndentWidth: 2
+IntegerLiteralSeparator:
+  Binary: 4
+  BinaryMinDigits: 8
+  Decimal: 3
+  DecimalMinDigits: 6
+  Hex: 4
+  HexMinDigits: 8
+QualifierAlignment: Custom
+QualifierOrder:
+  - constexpr
+  - type
+  - static
+  - inline
+  - const
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceBeforeSquareBrackets: false
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a007fea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build/*
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..9d6f6c1
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION "3.30.0")
+
+project("pen-fix"
+  LANGUAGES CXX
+)
+
+add_executable("pen-fix"
+  "pen-fix/main.cpp"
+)
+
+target_compile_features("pen-fix" PRIVATE
+  "cxx_std_23"
+)
diff --git a/pen-fix/main.cpp b/pen-fix/main.cpp
new file mode 100644
index 0000000..4688f28
--- /dev/null
+++ b/pen-fix/main.cpp
@@ -0,0 +1,113 @@
+#include <algorithm>
+#include <cstdio>
+#include <linux/input-event-codes.h>
+#include <linux/input.h>
+#include <poll.h>
+#include <sys/poll.h>
+#include <unistd.h>
+#include <utility>
+#include <vector>
+
+auto flush(std::vector<input_event> & frame) -> void
+{
+  std::ranges::for_each(frame, [](auto event) { std::fwrite(&event, sizeof(event), 1, stdout); });
+
+  std::fflush(stdout);
+  frame.clear();
+}
+
+auto main() -> int
+{
+  auto poll_descriptor = pollfd{.fd = STDIN_FILENO, .events = POLLIN, .revents = 0};
+
+  auto current_frame = std::vector<struct input_event>{};
+  auto deferred_frame = std::vector<struct input_event>{};
+  auto waiting_for_rubber_tool = false;
+
+  while (true)
+  {
+    auto timeout_ms = waiting_for_rubber_tool ? 50 : -1;
+    auto ret = poll(&poll_descriptor, 1, timeout_ms);
+
+    if (ret == 0)
+    {
+      if (waiting_for_rubber_tool)
+      {
+        flush(deferred_frame);
+        waiting_for_rubber_tool = false;
+      }
+      continue;
+    }
+
+    if (ret < 0)
+    {
+      break;
+    }
+
+    auto event = input_event{};
+    if (std::fread(&event, sizeof(event), 1, stdin) != 1)
+    {
+      break;
+    }
+
+    current_frame.push_back(event);
+
+    if (event.type == EV_SYN && event.code == SYN_REPORT)
+    {
+      auto has_pen_leave = false;
+      auto has_rubber_enter = false;
+      auto has_rubber_leave = false;
+
+      std::ranges::for_each(current_frame, [&](auto event) {
+        if (event.type == EV_KEY && event.code == BTN_TOOL_PEN && event.value == 0)
+          has_pen_leave = true;
+        if (event.type == EV_KEY && event.code == BTN_TOOL_RUBBER && event.value == 1)
+          has_rubber_enter = true;
+        if (event.type == EV_KEY && event.code == BTN_TOOL_RUBBER && event.value == 0)
+          has_rubber_leave = true;
+      });
+
+      if (has_pen_leave)
+      {
+        deferred_frame = std::move(current_frame);
+        waiting_for_rubber_tool = true;
+      }
+      else if (has_rubber_enter || has_rubber_leave)
+      {
+        auto mutated_frame = std::vector<input_event>{};
+
+        for (auto const & e : current_frame)
+        {
+          if (e.type == EV_KEY && e.code == BTN_TOOL_RUBBER)
+          {
+            struct input_event mutated_btn = e;
+            mutated_btn.code = BTN_STYLUS2;
+            mutated_frame.push_back(mutated_btn);
+          }
+          else if (e.type == EV_ABS)
+          {
+            continue;
+          }
+          else
+          {
+            mutated_frame.push_back(e);
+          }
+        }
+        deferred_frame.clear();
+        waiting_for_rubber_tool = false;
+        flush(mutated_frame);
+      }
+      else
+      {
+        if (waiting_for_rubber_tool)
+        {
+          flush(deferred_frame);
+          waiting_for_rubber_tool = false;
+        }
+        flush(current_frame);
+      }
+      current_frame.clear();
+    }
+  }
+  return 0;
+}