terminal/src/cascadia/TerminalSettingsModel/KeyChordSerialization.cpp
Mim van den Bos 17e68a09a8
Use WinRT VirtualKeyModifiers instead of a custom enum (#10603)
Replaces `KeyModifiers` with the pretty much equivalent
`VirtualKeyModifiers` enum in winrt.

After doing this I noticed #10593 which changes the KeyChords a lot, but
it seems these PRs are still compatible

The issue also mentions replacing Vkey with
`Windows::System::VirtualKey`, but I chose not to because that enum only
includes a subset of the keys terminal supports here (no VK_OEM_* keys)

## Validation Steps Performed
Changed key bind in config, and confirmed it still works after
restarting terminal

Closes #877
2021-07-12 21:24:26 +00:00

355 lines
12 KiB
C++

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#include "pch.h"
#include "KeyChordSerialization.h"
#include "KeyChordSerialization.g.cpp"
using namespace winrt::Microsoft::Terminal::Control;
using namespace winrt::Microsoft::Terminal::Settings::Model::implementation;
using namespace Microsoft::Terminal::Settings::Model::JsonUtils;
using VirtualKeyModifiers = winrt::Windows::System::VirtualKeyModifiers;
static constexpr std::wstring_view CTRL_KEY{ L"ctrl" };
static constexpr std::wstring_view SHIFT_KEY{ L"shift" };
static constexpr std::wstring_view ALT_KEY{ L"alt" };
static constexpr std::wstring_view WIN_KEY{ L"win" };
static constexpr int MAX_CHORD_PARTS = 5; // win+ctrl+alt+shift+key
// clang-format off
static const std::unordered_map<std::wstring_view, int32_t> vkeyNamePairs {
{ L"app" , VK_APPS },
{ L"backspace" , VK_BACK },
{ L"tab" , VK_TAB },
{ L"enter" , VK_RETURN },
{ L"esc" , VK_ESCAPE },
{ L"escape" , VK_ESCAPE },
{ L"menu" , VK_APPS },
{ L"space" , VK_SPACE },
{ L"pgup" , VK_PRIOR },
{ L"pageup" , VK_PRIOR },
{ L"pgdn" , VK_NEXT },
{ L"pagedown" , VK_NEXT },
{ L"end" , VK_END },
{ L"home" , VK_HOME },
{ L"left" , VK_LEFT },
{ L"up" , VK_UP },
{ L"right" , VK_RIGHT },
{ L"down" , VK_DOWN },
{ L"insert" , VK_INSERT },
{ L"delete" , VK_DELETE },
{ L"numpad_0" , VK_NUMPAD0 },
{ L"numpad0" , VK_NUMPAD0 },
{ L"numpad_1" , VK_NUMPAD1 },
{ L"numpad1" , VK_NUMPAD1 },
{ L"numpad_2" , VK_NUMPAD2 },
{ L"numpad2" , VK_NUMPAD2 },
{ L"numpad_3" , VK_NUMPAD3 },
{ L"numpad3" , VK_NUMPAD3 },
{ L"numpad_4" , VK_NUMPAD4 },
{ L"numpad4" , VK_NUMPAD4 },
{ L"numpad_5" , VK_NUMPAD5 },
{ L"numpad5" , VK_NUMPAD5 },
{ L"numpad_6" , VK_NUMPAD6 },
{ L"numpad6" , VK_NUMPAD6 },
{ L"numpad_7" , VK_NUMPAD7 },
{ L"numpad7" , VK_NUMPAD7 },
{ L"numpad_8" , VK_NUMPAD8 },
{ L"numpad8" , VK_NUMPAD8 },
{ L"numpad_9" , VK_NUMPAD9 },
{ L"numpad9" , VK_NUMPAD9 },
{ L"numpad_multiply" , VK_MULTIPLY },
{ L"numpad_plus" , VK_ADD },
{ L"numpad_add" , VK_ADD },
{ L"numpad_minus" , VK_SUBTRACT },
{ L"numpad_subtract" , VK_SUBTRACT },
{ L"numpad_period" , VK_DECIMAL },
{ L"numpad_decimal" , VK_DECIMAL },
{ L"numpad_divide" , VK_DIVIDE },
{ L"f1" , VK_F1 },
{ L"f2" , VK_F2 },
{ L"f3" , VK_F3 },
{ L"f4" , VK_F4 },
{ L"f5" , VK_F5 },
{ L"f6" , VK_F6 },
{ L"f7" , VK_F7 },
{ L"f8" , VK_F8 },
{ L"f9" , VK_F9 },
{ L"f10" , VK_F10 },
{ L"f11" , VK_F11 },
{ L"f12" , VK_F12 },
{ L"f13" , VK_F13 },
{ L"f14" , VK_F14 },
{ L"f15" , VK_F15 },
{ L"f16" , VK_F16 },
{ L"f17" , VK_F17 },
{ L"f18" , VK_F18 },
{ L"f19" , VK_F19 },
{ L"f20" , VK_F20 },
{ L"f21" , VK_F21 },
{ L"f22" , VK_F22 },
{ L"f23" , VK_F23 },
{ L"f24" , VK_F24 },
{ L"plus" , VK_OEM_PLUS }
};
// clang-format on
// Function Description:
// - Deserializes the given string into a new KeyChord instance. If this
// fails to translate the string into a keychord, it will throw a
// hresult_invalid_argument exception.
// - The string should fit the format "[ctrl+][alt+][shift+]<keyName>",
// where each modifier is optional, and keyName is either one of the
// names listed in the vkeyNamePairs vector above, or is one of 0-9a-zA-Z.
// Arguments:
// - hstr: the string to parse into a keychord.
// Return Value:
// - a newly constructed KeyChord
static KeyChord _fromString(const std::wstring_view& wstr)
{
// Split the string on '+'
std::wstring temp;
std::vector<std::wstring> parts;
std::wstringstream wss;
wss << wstr;
while (std::getline(wss, temp, L'+'))
{
parts.push_back(temp);
// If we have > 4, something's wrong.
if (parts.size() > MAX_CHORD_PARTS)
{
throw winrt::hresult_invalid_argument();
}
}
VirtualKeyModifiers modifiers = VirtualKeyModifiers::None;
int32_t vkey = 0;
// Look for ctrl, shift, alt. Anything else might be a key
for (const auto& part : parts)
{
std::wstring lowercase = part;
std::transform(lowercase.begin(), lowercase.end(), lowercase.begin(), std::towlower);
if (lowercase == CTRL_KEY)
{
modifiers |= VirtualKeyModifiers::Control;
}
else if (lowercase == ALT_KEY)
{
modifiers |= VirtualKeyModifiers::Menu;
}
else if (lowercase == SHIFT_KEY)
{
modifiers |= VirtualKeyModifiers::Shift;
}
else if (lowercase == WIN_KEY)
{
modifiers |= VirtualKeyModifiers::Windows;
}
else
{
bool foundKey = false;
// For potential keys, look through the pairs of strings and vkeys
if (part.size() == 1)
{
const wchar_t wch = part.at(0);
// Quick lookup: ranges of vkeys that correlate directly to a key.
if (wch >= L'0' && wch <= L'9')
{
vkey = static_cast<int32_t>(wch);
foundKey = true;
}
else if (wch >= L'a' && wch <= L'z')
{
// subtract 0x20 to shift to uppercase
vkey = static_cast<int32_t>(wch - 0x20);
foundKey = true;
}
else if (wch >= L'A' && wch <= L'Z')
{
vkey = static_cast<int32_t>(wch);
foundKey = true;
}
}
// If we didn't find the key with a quick lookup, search the
// table to see if we have a matching name.
if (!foundKey && vkeyNamePairs.find(part) != vkeyNamePairs.end())
{
vkey = vkeyNamePairs.at(part);
foundKey = true;
break;
}
// If we haven't found a key, attempt a keyboard mapping
if (!foundKey && part.size() == 1)
{
auto oemVk = VkKeyScanW(part[0]);
if (oemVk != -1)
{
vkey = oemVk & 0xFF;
auto oemModifiers = (oemVk & 0xFF00) >> 8;
// We're using WI_SetFlagIf instead of WI_UpdateFlag because we want to be strictly additive
// to the user's specified modifiers. ctrl+| should be the same as ctrl+shift+\,
// but if we used WI_UpdateFlag, ctrl+shift+\ would turn _off_ Shift because \ doesn't
// require it.
WI_SetFlagIf(modifiers, VirtualKeyModifiers::Shift, WI_IsFlagSet(oemModifiers, 1U));
WI_SetFlagIf(modifiers, VirtualKeyModifiers::Control, WI_IsFlagSet(oemModifiers, 2U));
WI_SetFlagIf(modifiers, VirtualKeyModifiers::Menu, WI_IsFlagSet(oemModifiers, 4U));
foundKey = true;
}
}
// If we weren't able to find a match, throw an exception.
if (!foundKey)
{
throw winrt::hresult_invalid_argument();
}
}
}
return KeyChord{ modifiers, vkey };
}
// Function Description:
// - Serialize this keychord into a string representation.
// - The string will fit the format "[ctrl+][alt+][shift+]<keyName>",
// where each modifier is optional, and keyName is either one of the
// names listed in the vkeyNamePairs vector above, or is one of 0-9a-z.
// Return Value:
// - a string which is an equivalent serialization of this object.
static std::wstring _toString(const KeyChord& chord)
{
if (!chord)
{
return {};
}
bool serializedSuccessfully = false;
const auto modifiers = chord.Modifiers();
const auto vkey = chord.Vkey();
std::wstring buffer{ L"" };
// Add modifiers
if (WI_IsFlagSet(modifiers, VirtualKeyModifiers::Windows))
{
buffer += WIN_KEY;
buffer += L"+";
}
if (WI_IsFlagSet(modifiers, VirtualKeyModifiers::Control))
{
buffer += CTRL_KEY;
buffer += L"+";
}
if (WI_IsFlagSet(modifiers, VirtualKeyModifiers::Menu))
{
buffer += ALT_KEY;
buffer += L"+";
}
if (WI_IsFlagSet(modifiers, VirtualKeyModifiers::Shift))
{
buffer += SHIFT_KEY;
buffer += L"+";
}
// Quick lookup: ranges of vkeys that correlate directly to a key.
if (vkey >= L'0' && vkey <= L'9')
{
buffer += std::wstring(1, static_cast<wchar_t>(vkey));
serializedSuccessfully = true;
}
else if (vkey >= L'A' && vkey <= L'Z')
{
// add 0x20 to shift to lowercase
buffer += std::wstring(1, static_cast<wchar_t>(vkey + 0x20));
serializedSuccessfully = true;
}
else
{
bool foundKey = false;
for (const auto& pair : vkeyNamePairs)
{
if (pair.second == vkey)
{
buffer += pair.first;
serializedSuccessfully = true;
foundKey = true;
break;
}
}
if (!foundKey)
{
auto mappedChar = MapVirtualKeyW(vkey, MAPVK_VK_TO_CHAR);
if (mappedChar != 0)
{
wchar_t mappedWch = gsl::narrow_cast<wchar_t>(mappedChar);
buffer += std::wstring_view{ &mappedWch, 1 };
serializedSuccessfully = true;
}
}
}
if (!serializedSuccessfully)
{
buffer = L"";
}
return buffer;
}
KeyChord KeyChordSerialization::FromString(const winrt::hstring& hstr)
{
return _fromString(hstr);
}
winrt::hstring KeyChordSerialization::ToString(const KeyChord& chord)
{
return hstring{ _toString(chord) };
}
KeyChord ConversionTrait<KeyChord>::FromJson(const Json::Value& json)
{
try
{
std::string keyChordText;
if (json.isString())
{
// "keys": "ctrl+c"
keyChordText = json.asString();
}
else if (json.isArray() && json.size() == 1 && json[0].isString())
{
// "keys": [ "ctrl+c" ]
keyChordText = json[0].asString();
}
else
{
throw winrt::hresult_invalid_argument{};
}
return _fromString(til::u8u16(keyChordText));
}
catch (...)
{
return nullptr;
}
}
bool ConversionTrait<KeyChord>::CanConvert(const Json::Value& json)
{
return json.isString() || (json.isArray() && json.size() == 1 && json[0].isString());
}
Json::Value ConversionTrait<KeyChord>::ToJson(const KeyChord& val)
{
return til::u16u8(_toString(val));
}
std::string ConversionTrait<KeyChord>::TypeDescription() const
{
return "key chord";
}