333 lines
14 KiB
C++
333 lines
14 KiB
C++
#include "views/view_help.hpp"
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#include <imgui_imhex_extensions.h>
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namespace hex {
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ViewHelp::ViewHelp() : View("Help") {
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}
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ViewHelp::~ViewHelp() {
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}
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static void drawTitle(const std::string &title) {
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ImGui::TextColored(ImVec4(0.6F, 0.6F, 1.0F, 1.0F), title.c_str());
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}
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static void drawCodeSegment(const std::string &id, const std::string &code) {
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ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4(0.2F, 0.2F, 0.2F, 0.3F));
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ImGui::BeginChild(id.c_str(), ImVec2(-1, ImGui::CalcTextSize(code.c_str()).y));
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ImGui::Text("%s", code.c_str());
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ImGui::EndChild();
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ImGui::NewLine();
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ImGui::PopStyleColor();
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};
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void ViewHelp::drawAboutPopup() {
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if (ImGui::BeginPopupModal("About", &this->m_aboutWindowOpen, ImGuiWindowFlags_AlwaysAutoResize)) {
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ImGui::Text("ImHex Hex Editor v%s by WerWolv -", IMHEX_VERSION);
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#if defined(GIT_BRANCH) && defined(GIT_COMMIT_HASH)
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ImGui::SameLine();
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if (ImGui::Hyperlink(hex::format("%s@%s", GIT_BRANCH, GIT_COMMIT_HASH).c_str()))
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hex::openWebpage("https://github.com/WerWolv/ImHex/commit/" GIT_COMMIT_HASH);
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#endif
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ImGui::TextUnformatted("Source code available on GitHub:"); ImGui::SameLine();
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if (ImGui::Hyperlink("WerWolv/ImHex"))
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hex::openWebpage("https://github.com/WerWolv/ImHex");
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ImGui::NewLine();
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ImGui::Text("Donations");
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ImGui::Separator();
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constexpr const char* Links[] = { "https://werwolv.net/donate", "https://www.patreon.com/werwolv", "https://github.com/sponsors/WerWolv" };
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ImGui::TextWrapped("If you like my work, please consider donating to keep the project going. Thanks a lot <3");
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ImGui::NewLine();
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for (auto &link : Links) {
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if (ImGui::Hyperlink(link))
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hex::openWebpage(link);
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}
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ImGui::NewLine();
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ImGui::Text("Libraries used");
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ImGui::Separator();
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ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4(0.2F, 0.2F, 0.2F, 0.3F));
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ImGui::BulletText("ImGui by ocornut");
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ImGui::BulletText("imgui_club by ocornut");
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ImGui::BulletText("ImGui-Addons by gallickgunner");
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ImGui::BulletText("ImGuiColorTextEdit by BalazsJako");
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ImGui::BulletText("capstone by aquynh");
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ImGui::BulletText("JSON for Modern C++ by nlohmann");
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ImGui::NewLine();
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ImGui::BulletText("GNU libmagic");
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ImGui::BulletText("OpenSSL libcrypto");
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ImGui::BulletText("GLFW3");
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ImGui::BulletText("LLVM");
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ImGui::BulletText("Python 3");
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ImGui::BulletText("FreeType");
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ImGui::PopStyleColor();
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if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_Escape)))
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ImGui::CloseCurrentPopup();
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ImGui::EndPopup();
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}
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}
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void ViewHelp::drawPatternHelpPopup() {
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if (!this->m_patternHelpWindowOpen) return;
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ImGui::SetNextWindowSizeConstraints(ImVec2(450, 300), ImVec2(2000, 1000));
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if (ImGui::Begin("Pattern Language Cheat Sheet", &this->m_patternHelpWindowOpen)) {
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ImGui::Text("ImHex Pattern Language Cheat Sheet");
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ImGui::Separator();
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ImGui::NewLine();
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drawTitle("Preprocessor directives");
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ImGui::TextWrapped(
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"Preprocessor directives can be used to alter the code before it's being parsed. Supported are "
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"#define to replace one string with another and #include to include a separate file");
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drawCodeSegment("preprocessor",
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"#define HEADER_OFFSET 0x100\n"
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"#include <cstdint.hexpat>\n"
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"#include \"mypattern.hexpat\""
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);
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drawTitle("Pragma directives");
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ImGui::TextWrapped(
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"Pragma directives are used to give ImHex additional information about the code being read. Currently "
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"the following directives are supported.");
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drawCodeSegment("pragma",
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"// Allow this file to be loaded as pattern when a file\n"
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"// identified as application/x-executable gets loaded\n"
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"#pragma MIME application/x-executable\n"
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);
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drawTitle("Built-in types");
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ImGui::TextWrapped(
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"The following built-in types are available for use");
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drawCodeSegment("built-in",
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"u8, s8\n"
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"u16, s16\n"
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"u32, s32\n"
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"u64, s64\n"
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"u128, s128\n"
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"float, double"
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);
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drawTitle("Variables and Arrays");
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ImGui::TextWrapped(
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"Normal variables as well as arrays are used to highlight and display values. "
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"It is possible to create arrays within structs and unions that use the value of a previously "
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"declared variable as size. In order to override the native / globally set endianess setting, every "
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"type in a variable declaration may be prefixed with be or le to turn only it into a big or little endian type.");
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drawCodeSegment("vars arrays",
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"u32 variable;\n"
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"s8 string[16];\n"
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"u8 customSizedArray[variable];\n"
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"be u32 bigEndianVariable;"
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);
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drawTitle("Structs");
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ImGui::TextWrapped(
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"To bundle multiple variables together, a struct can be used. To insert padding bytes which won't show "
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"up in the pattern data view or be highlighted, use the padding[size] syntax.");
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drawCodeSegment("struct",
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"struct Header {\n"
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" u32 magic;\n"
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" u8 version;\n"
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" padding[4];\n"
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" Flags flags;\n"
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"};"
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);
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drawTitle("Unions");
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ImGui::TextWrapped(
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"A union is used to make two or more variables occupy the same region of memory. "
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"The union will have the size of the biggest contained variable.");
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drawCodeSegment("union",
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"union Color {\n"
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" u32 rgba;\n"
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" Components components;\n"
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"};"
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);
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drawTitle("Pointers");
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ImGui::TextWrapped(
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"\"Another possible type of member in structs and unions are pointers. They are variables"
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"whose value is used as an offset from the start of the file to locate the actual offset. "
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"The leading type is treated as the data being pointed to and the trailing type as the size of the pointer.");
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drawCodeSegment("pointer",
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"Data *data : u16;"
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);
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drawTitle("Bitfields");
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ImGui::TextWrapped(
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"To decode values that are stored in fields that don't follow the typical 8 bit alignment, bitfields can be used. "
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"The size of these fields get specified in numbers of bits.");
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drawCodeSegment("bitfield",
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"bitfield Permission {\n"
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" r : 1;\n"
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" w : 1;\n"
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" x : 1;\n"
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"};"
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);
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drawTitle("Enum");
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ImGui::TextWrapped(
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"If a value can only be a few specific values with special meaning, an enum can be used. "
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"The underlying type has to be specified using a unsigned, built-in type after the name. "
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"Entries can be listed with or without a value. The values start counting at zero and increase by one "
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"for every next entry");
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drawCodeSegment("enum",
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"enum OperatingSystem : u8 {\n"
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" Windows = 0x10,\n"
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" MacOSX,\n"
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" Linux = 'L'\n"
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"};"
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);
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drawTitle("Using declarations");
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ImGui::TextWrapped(
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"A using declaration can be used to create type aliases for already existing types. This can be "
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"a built-in type, a struct, enum or another alias type.");
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drawCodeSegment("using",
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"using magic_t = u32;"
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);
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drawTitle("Comments");
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ImGui::TextWrapped(
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"To create a comment the C // or /* */ syntax can be used. //-style comments end at the next new line "
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"and /*-style comments only end when at the next */.");
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drawCodeSegment("comment",
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"// This is a single line comment\n\n"
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"/* This is a\n"
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"multiline comment */"
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);
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drawTitle("Variable placement");
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ImGui::TextWrapped(
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"In order to highlight bytes and displaying their value in the pattern data window, "
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"a variable needs to be created and placed in memory. The following line of code creates"
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"a unsigned 32 bit variable named data and places it at offset 0x100."
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);
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drawCodeSegment("var placement", "u32 data @ 0x100;");
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}
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ImGui::End();
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}
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void ViewHelp::drawMathEvaluatorHelp() {
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if (!this->m_mathHelpWindowOpen) return;
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ImGui::SetNextWindowSizeConstraints(ImVec2(450, 300), ImVec2(2000, 1000));
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if (ImGui::Begin("Calculator Cheat Sheet", &this->m_mathHelpWindowOpen)) {
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ImGui::Text("ImHex Math Evaluator Cheat Sheet");
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ImGui::Separator();
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ImGui::NewLine();
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ImGui::TextWrapped("ImGui has a simple math evaluator / calculator built-in. It works by parsing the "
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"expressions passed to it and displaying the result in the History table.");
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ImGui::NewLine();
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drawTitle("Basic Operators");
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ImGui::TextWrapped(
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"The following basic mathematical operators are supported");
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drawCodeSegment("basicOperators",
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"+ : Addition\n"
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"- : Subtraction\n"
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"* : Multiplication\n"
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"/ : Division\n"
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"% : Modulus\n"
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"** : Exponentiation\n"
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"() : Brackets\n"
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"x = : Variable assignment");
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drawTitle("Bitwise Operators");
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ImGui::TextWrapped(
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"The following bitwise operators are supported");
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drawCodeSegment("bitwiseOperators",
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"& : Bitwise AND\n"
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"| : Bitwise OR\n"
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"^ : Bitwise XOR\n"
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"~ : Bitwise NOT\n"
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"<< : Logical shift left\n"
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">> : Logical shift right\n"
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"## : Bitwise concatenation");
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drawTitle("Boolean Operators");
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ImGui::TextWrapped(
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"The following bitwise operators are supported");
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drawCodeSegment("booleanOperators",
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"&& : Boolean AND\n"
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"|| : Boolean OR\n"
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"^^ : Boolean XOR\n"
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"! : Boolean NOT\n"
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"== : Equality comparison\n"
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"!= : Inequality comparison\n"
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"> : Greater than comparison\n"
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"< : Less than comparison\n"
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">= : Greater than or equals comparison\n"
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"<= : Less than or equals comparison");
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drawTitle("Built-in Functions");
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ImGui::TextWrapped(
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"The following functions are built into the evaluator");
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drawCodeSegment("functions",
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"sin(x) : Sine function\n"
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"cos(x) : Cosine function\n"
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"tan(x) : Tangent function\n"
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"ceil(x) : Rounds value to next bigger integer\n"
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"floor(x) : Rounds value to next smaller integer\n"
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"sign(x) : Returns the value's sign\n"
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"abs(x) : Absolute value\n"
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"ln(x) : Natural Logarithm\n"
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"lb(x) : Logarithm with base 2\n"
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"log(x, b) : Logarithm with custom base. Defaults to base 10\n"
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"clear() : Clear History and variables\n"
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"read(a) : Read 1 byte from loaded data\n"
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"write(a, x) : Write 1 byte to loaded data");
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}
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ImGui::End();
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}
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void ViewHelp::drawContent() {
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if (!this->m_aboutWindowOpen && !this->m_mathHelpWindowOpen && !this->m_patternHelpWindowOpen)
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this->getWindowOpenState() = false;
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this->drawAboutPopup();
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this->drawPatternHelpPopup();
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this->drawMathEvaluatorHelp();
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}
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void ViewHelp::drawMenu() {
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if (ImGui::BeginMenu("Help")) {
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if (ImGui::MenuItem("About", "")) {
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View::doLater([] { ImGui::OpenPopup("About"); });
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this->m_aboutWindowOpen = true;
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this->getWindowOpenState() = true;
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}
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ImGui::Separator();
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if (ImGui::MenuItem("Pattern Language Cheat Sheet", "")) {
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this->m_patternHelpWindowOpen = true;
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this->getWindowOpenState() = true;
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}
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if (ImGui::MenuItem("Calculator Cheat Sheet", "")) {
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this->m_mathHelpWindowOpen = true;
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this->getWindowOpenState() = true;
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}
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ImGui::EndMenu();
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}
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}
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} |