423 lines
20 KiB
Plaintext
423 lines
20 KiB
Plaintext
// Copyright (c) 2015 Ryan Prichard
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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#include "DefaultInputMap.h"
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#include <windows.h>
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#include <string.h>
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#include <algorithm>
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#include "../shared/StringBuilder.h"
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#include "../shared/WinptyAssert.h"
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#include "InputMap.h"
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#define ESC "\x1B"
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#define DIM(x) (sizeof(x) / sizeof((x)[0]))
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namespace {
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struct EscapeEncoding {
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bool alt_prefix_allowed;
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char prefix;
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char id;
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int modifiers;
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InputMap::Key key;
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};
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// Modifiers. A "modifier" is an integer from 2 to 8 that conveys the status
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// of Shift(1), Alt(2), and Ctrl(4). The value is constructed by OR'ing the
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// appropriate value for each active modifier, then adding 1.
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//
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// Details:
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// - kBare: expands to: ESC <prefix> <suffix>
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// - kSemiMod: expands to: ESC <prefix> <numid> ; <mod> <suffix>
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// - kBareMod: expands to: ESC <prefix> <mod> <suffix>
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const int kBare = 0x01;
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const int kSemiMod = 0x02;
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const int kBareMod = 0x04;
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// Numeric escape sequences suffixes:
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// - with no flag: accept: ~
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// - kSuffixCtrl: accept: ~ ^
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// - kSuffixShift: accept: ~ $
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// - kSuffixBoth: accept: ~ ^ $ @
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const int kSuffixCtrl = 0x08;
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const int kSuffixShift = 0x10;
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const int kSuffixBoth = kSuffixCtrl | kSuffixShift;
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static const EscapeEncoding escapeLetterEncodings[] = {
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// Conventional arrow keys
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// kBareMod: Ubuntu /etc/inputrc and IntelliJ/JediTerm use escapes like: ESC [ n ABCD
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{ true, '[', 'A', kBare | kBareMod | kSemiMod, { VK_UP, '\0', 0 } },
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{ true, '[', 'B', kBare | kBareMod | kSemiMod, { VK_DOWN, '\0', 0 } },
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{ true, '[', 'C', kBare | kBareMod | kSemiMod, { VK_RIGHT, '\0', 0 } },
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{ true, '[', 'D', kBare | kBareMod | kSemiMod, { VK_LEFT, '\0', 0 } },
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// putty. putty uses this sequence for Ctrl-Arrow, Shift-Arrow, and
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// Ctrl-Shift-Arrow, but I can only decode to one choice, so I'm just
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// leaving the modifier off altogether.
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{ true, 'O', 'A', kBare, { VK_UP, '\0', 0 } },
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{ true, 'O', 'B', kBare, { VK_DOWN, '\0', 0 } },
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{ true, 'O', 'C', kBare, { VK_RIGHT, '\0', 0 } },
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{ true, 'O', 'D', kBare, { VK_LEFT, '\0', 0 } },
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// rxvt, rxvt-unicode
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// Shift-Ctrl-Arrow can't be identified. It's the same as Shift-Arrow.
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{ true, '[', 'a', kBare, { VK_UP, '\0', SHIFT_PRESSED } },
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{ true, '[', 'b', kBare, { VK_DOWN, '\0', SHIFT_PRESSED } },
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{ true, '[', 'c', kBare, { VK_RIGHT, '\0', SHIFT_PRESSED } },
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{ true, '[', 'd', kBare, { VK_LEFT, '\0', SHIFT_PRESSED } },
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{ true, 'O', 'a', kBare, { VK_UP, '\0', LEFT_CTRL_PRESSED } },
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{ true, 'O', 'b', kBare, { VK_DOWN, '\0', LEFT_CTRL_PRESSED } },
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{ true, 'O', 'c', kBare, { VK_RIGHT, '\0', LEFT_CTRL_PRESSED } },
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{ true, 'O', 'd', kBare, { VK_LEFT, '\0', LEFT_CTRL_PRESSED } },
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// Numpad 5 with NumLock off
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// * xterm, mintty, and gnome-terminal use `ESC [ E`.
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// * putty, TERM=cygwin, TERM=linux all use `ESC [ G` for 5
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// * putty uses `ESC O G` for Ctrl-5 and Shift-5. Omit the modifier
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// as with putty's arrow keys.
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// * I never saw modifiers inserted into these escapes, but I think
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// it should be completely OK with the CSI escapes.
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{ true, '[', 'E', kBare | kSemiMod, { VK_CLEAR, '\0', 0 } },
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{ true, '[', 'G', kBare | kSemiMod, { VK_CLEAR, '\0', 0 } },
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{ true, 'O', 'G', kBare, { VK_CLEAR, '\0', 0 } },
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// Home/End, letter version
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// * gnome-terminal uses `ESC O [HF]`. I never saw it modified.
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// kBareMod: IntelliJ/JediTerm uses escapes like: ESC [ n HF
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{ true, '[', 'H', kBare | kBareMod | kSemiMod, { VK_HOME, '\0', 0 } },
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{ true, '[', 'F', kBare | kBareMod | kSemiMod, { VK_END, '\0', 0 } },
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{ true, 'O', 'H', kBare, { VK_HOME, '\0', 0 } },
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{ true, 'O', 'F', kBare, { VK_END, '\0', 0 } },
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// F1-F4, letter version (xterm, VTE, konsole)
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{ true, '[', 'P', kSemiMod, { VK_F1, '\0', 0 } },
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{ true, '[', 'Q', kSemiMod, { VK_F2, '\0', 0 } },
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{ true, '[', 'R', kSemiMod, { VK_F3, '\0', 0 } },
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{ true, '[', 'S', kSemiMod, { VK_F4, '\0', 0 } },
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// GNOME VTE and Konsole have special encodings for modified F1-F4:
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// * [VTE] ESC O 1 ; n [PQRS]
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// * [Konsole] ESC O n [PQRS]
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{ false, 'O', 'P', kBare | kBareMod | kSemiMod, { VK_F1, '\0', 0 } },
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{ false, 'O', 'Q', kBare | kBareMod | kSemiMod, { VK_F2, '\0', 0 } },
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{ false, 'O', 'R', kBare | kBareMod | kSemiMod, { VK_F3, '\0', 0 } },
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{ false, 'O', 'S', kBare | kBareMod | kSemiMod, { VK_F4, '\0', 0 } },
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// Handle the "application numpad" escape sequences.
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//
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// Terminals output these codes under various circumstances:
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// * rxvt-unicode: numpad, hold down SHIFT
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// * rxvt: numpad, by default
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// * xterm: numpad, after enabling app-mode using DECPAM (`ESC =`). xterm
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// generates `ESC O <mod> <letter>` for modified numpad presses,
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// necessitating kBareMod.
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// * mintty: by combining Ctrl with various keys such as '1' or ','.
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// Handling those keys is difficult, because mintty is generating the
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// same sequence for Ctrl-1 and Ctrl-NumPadEnd -- should the virtualKey
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// be '1' or VK_HOME?
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{ true, 'O', 'M', kBare | kBareMod, { VK_RETURN, '\r', 0 } },
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{ true, 'O', 'j', kBare | kBareMod, { VK_MULTIPLY, '*', 0 } },
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{ true, 'O', 'k', kBare | kBareMod, { VK_ADD, '+', 0 } },
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{ true, 'O', 'm', kBare | kBareMod, { VK_SUBTRACT, '-', 0 } },
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{ true, 'O', 'n', kBare | kBareMod, { VK_DELETE, '\0', 0 } },
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{ true, 'O', 'o', kBare | kBareMod, { VK_DIVIDE, '/', 0 } },
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{ true, 'O', 'p', kBare | kBareMod, { VK_INSERT, '\0', 0 } },
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{ true, 'O', 'q', kBare | kBareMod, { VK_END, '\0', 0 } },
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{ true, 'O', 'r', kBare | kBareMod, { VK_DOWN, '\0', 0 } },
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{ true, 'O', 's', kBare | kBareMod, { VK_NEXT, '\0', 0 } },
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{ true, 'O', 't', kBare | kBareMod, { VK_LEFT, '\0', 0 } },
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{ true, 'O', 'u', kBare | kBareMod, { VK_CLEAR, '\0', 0 } },
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{ true, 'O', 'v', kBare | kBareMod, { VK_RIGHT, '\0', 0 } },
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{ true, 'O', 'w', kBare | kBareMod, { VK_HOME, '\0', 0 } },
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{ true, 'O', 'x', kBare | kBareMod, { VK_UP, '\0', 0 } },
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{ true, 'O', 'y', kBare | kBareMod, { VK_PRIOR, '\0', 0 } },
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{ true, '[', 'M', kBare | kSemiMod, { VK_RETURN, '\r', 0 } },
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{ true, '[', 'j', kBare | kSemiMod, { VK_MULTIPLY, '*', 0 } },
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{ true, '[', 'k', kBare | kSemiMod, { VK_ADD, '+', 0 } },
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{ true, '[', 'm', kBare | kSemiMod, { VK_SUBTRACT, '-', 0 } },
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{ true, '[', 'n', kBare | kSemiMod, { VK_DELETE, '\0', 0 } },
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{ true, '[', 'o', kBare | kSemiMod, { VK_DIVIDE, '/', 0 } },
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{ true, '[', 'p', kBare | kSemiMod, { VK_INSERT, '\0', 0 } },
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{ true, '[', 'q', kBare | kSemiMod, { VK_END, '\0', 0 } },
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{ true, '[', 'r', kBare | kSemiMod, { VK_DOWN, '\0', 0 } },
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{ true, '[', 's', kBare | kSemiMod, { VK_NEXT, '\0', 0 } },
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{ true, '[', 't', kBare | kSemiMod, { VK_LEFT, '\0', 0 } },
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{ true, '[', 'u', kBare | kSemiMod, { VK_CLEAR, '\0', 0 } },
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{ true, '[', 'v', kBare | kSemiMod, { VK_RIGHT, '\0', 0 } },
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{ true, '[', 'w', kBare | kSemiMod, { VK_HOME, '\0', 0 } },
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{ true, '[', 'x', kBare | kSemiMod, { VK_UP, '\0', 0 } },
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{ true, '[', 'y', kBare | kSemiMod, { VK_PRIOR, '\0', 0 } },
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{ false, '[', 'Z', kBare, { VK_TAB, '\t', SHIFT_PRESSED } },
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};
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static const EscapeEncoding escapeNumericEncodings[] = {
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{ true, '[', 1, kBare | kSemiMod | kSuffixBoth, { VK_HOME, '\0', 0 } },
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{ true, '[', 2, kBare | kSemiMod | kSuffixBoth, { VK_INSERT, '\0', 0 } },
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{ true, '[', 3, kBare | kSemiMod | kSuffixBoth, { VK_DELETE, '\0', 0 } },
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{ true, '[', 4, kBare | kSemiMod | kSuffixBoth, { VK_END, '\0', 0 } },
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{ true, '[', 5, kBare | kSemiMod | kSuffixBoth, { VK_PRIOR, '\0', 0 } },
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{ true, '[', 6, kBare | kSemiMod | kSuffixBoth, { VK_NEXT, '\0', 0 } },
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{ true, '[', 7, kBare | kSemiMod | kSuffixBoth, { VK_HOME, '\0', 0 } },
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{ true, '[', 8, kBare | kSemiMod | kSuffixBoth, { VK_END, '\0', 0 } },
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{ true, '[', 11, kBare | kSemiMod | kSuffixBoth, { VK_F1, '\0', 0 } },
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{ true, '[', 12, kBare | kSemiMod | kSuffixBoth, { VK_F2, '\0', 0 } },
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{ true, '[', 13, kBare | kSemiMod | kSuffixBoth, { VK_F3, '\0', 0 } },
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{ true, '[', 14, kBare | kSemiMod | kSuffixBoth, { VK_F4, '\0', 0 } },
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{ true, '[', 15, kBare | kSemiMod | kSuffixBoth, { VK_F5, '\0', 0 } },
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{ true, '[', 17, kBare | kSemiMod | kSuffixBoth, { VK_F6, '\0', 0 } },
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{ true, '[', 18, kBare | kSemiMod | kSuffixBoth, { VK_F7, '\0', 0 } },
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{ true, '[', 19, kBare | kSemiMod | kSuffixBoth, { VK_F8, '\0', 0 } },
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{ true, '[', 20, kBare | kSemiMod | kSuffixBoth, { VK_F9, '\0', 0 } },
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{ true, '[', 21, kBare | kSemiMod | kSuffixBoth, { VK_F10, '\0', 0 } },
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{ true, '[', 23, kBare | kSemiMod | kSuffixBoth, { VK_F11, '\0', 0 } },
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{ true, '[', 24, kBare | kSemiMod | kSuffixBoth, { VK_F12, '\0', 0 } },
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{ true, '[', 25, kBare | kSemiMod | kSuffixBoth, { VK_F3, '\0', SHIFT_PRESSED } },
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{ true, '[', 26, kBare | kSemiMod | kSuffixBoth, { VK_F4, '\0', SHIFT_PRESSED } },
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{ true, '[', 28, kBare | kSemiMod | kSuffixBoth, { VK_F5, '\0', SHIFT_PRESSED } },
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{ true, '[', 29, kBare | kSemiMod | kSuffixBoth, { VK_F6, '\0', SHIFT_PRESSED } },
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{ true, '[', 31, kBare | kSemiMod | kSuffixBoth, { VK_F7, '\0', SHIFT_PRESSED } },
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{ true, '[', 32, kBare | kSemiMod | kSuffixBoth, { VK_F8, '\0', SHIFT_PRESSED } },
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{ true, '[', 33, kBare | kSemiMod | kSuffixBoth, { VK_F9, '\0', SHIFT_PRESSED } },
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{ true, '[', 34, kBare | kSemiMod | kSuffixBoth, { VK_F10, '\0', SHIFT_PRESSED } },
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};
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const int kCsiShiftModifier = 1;
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const int kCsiAltModifier = 2;
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const int kCsiCtrlModifier = 4;
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static inline bool useEnhancedForVirtualKey(uint16_t vk) {
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switch (vk) {
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case VK_UP:
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case VK_DOWN:
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case VK_LEFT:
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case VK_RIGHT:
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case VK_INSERT:
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case VK_DELETE:
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case VK_HOME:
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case VK_END:
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case VK_PRIOR:
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case VK_NEXT:
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return true;
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default:
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return false;
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}
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}
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static void addSimpleEntries(InputMap &inputMap) {
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struct SimpleEncoding {
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const char *encoding;
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InputMap::Key key;
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};
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static const SimpleEncoding simpleEncodings[] = {
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// Ctrl-<letter/digit> seems to be handled OK by the default code path.
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{ "\x7F", { VK_BACK, '\x08', 0, } },
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{ ESC "\x7F", { VK_BACK, '\x08', LEFT_ALT_PRESSED, } },
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{ "\x03", { 'C', '\x03', LEFT_CTRL_PRESSED, } },
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// Handle special F1-F5 for TERM=linux and TERM=cygwin.
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{ ESC "[[A", { VK_F1, '\0', 0 } },
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{ ESC "[[B", { VK_F2, '\0', 0 } },
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{ ESC "[[C", { VK_F3, '\0', 0 } },
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{ ESC "[[D", { VK_F4, '\0', 0 } },
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{ ESC "[[E", { VK_F5, '\0', 0 } },
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{ ESC ESC "[[A", { VK_F1, '\0', LEFT_ALT_PRESSED } },
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{ ESC ESC "[[B", { VK_F2, '\0', LEFT_ALT_PRESSED } },
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{ ESC ESC "[[C", { VK_F3, '\0', LEFT_ALT_PRESSED } },
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{ ESC ESC "[[D", { VK_F4, '\0', LEFT_ALT_PRESSED } },
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{ ESC ESC "[[E", { VK_F5, '\0', LEFT_ALT_PRESSED } },
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};
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for (size_t i = 0; i < DIM(simpleEncodings); ++i) {
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auto k = simpleEncodings[i].key;
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if (useEnhancedForVirtualKey(k.virtualKey)) {
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k.keyState |= ENHANCED_KEY;
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}
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inputMap.set(simpleEncodings[i].encoding,
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strlen(simpleEncodings[i].encoding),
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k);
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}
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}
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struct ExpandContext {
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InputMap &inputMap;
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const EscapeEncoding &e;
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char *buffer;
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char *bufferEnd;
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};
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static inline void setEncoding(const ExpandContext &ctx, char *end,
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uint16_t extraKeyState) {
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InputMap::Key k = ctx.e.key;
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k.keyState |= extraKeyState;
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if (k.keyState & LEFT_CTRL_PRESSED) {
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switch (k.virtualKey) {
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case VK_ADD:
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case VK_DIVIDE:
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case VK_MULTIPLY:
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case VK_SUBTRACT:
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k.unicodeChar = '\0';
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break;
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case VK_RETURN:
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k.unicodeChar = '\n';
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break;
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}
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}
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if (useEnhancedForVirtualKey(k.virtualKey)) {
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k.keyState |= ENHANCED_KEY;
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}
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ctx.inputMap.set(ctx.buffer, end - ctx.buffer, k);
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}
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static inline uint16_t keyStateForMod(int mod) {
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int ret = 0;
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if ((mod - 1) & kCsiShiftModifier) ret |= SHIFT_PRESSED;
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if ((mod - 1) & kCsiAltModifier) ret |= LEFT_ALT_PRESSED;
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if ((mod - 1) & kCsiCtrlModifier) ret |= LEFT_CTRL_PRESSED;
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return ret;
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}
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static void expandNumericEncodingSuffix(const ExpandContext &ctx, char *p,
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uint16_t extraKeyState) {
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ASSERT(p <= ctx.bufferEnd - 1);
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{
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char *q = p;
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*q++ = '~';
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setEncoding(ctx, q, extraKeyState);
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}
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if (ctx.e.modifiers & kSuffixShift) {
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char *q = p;
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*q++ = '$';
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setEncoding(ctx, q, extraKeyState | SHIFT_PRESSED);
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}
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if (ctx.e.modifiers & kSuffixCtrl) {
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char *q = p;
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*q++ = '^';
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setEncoding(ctx, q, extraKeyState | LEFT_CTRL_PRESSED);
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}
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if (ctx.e.modifiers & (kSuffixCtrl | kSuffixShift)) {
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char *q = p;
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*q++ = '@';
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setEncoding(ctx, q, extraKeyState | SHIFT_PRESSED | LEFT_CTRL_PRESSED);
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}
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}
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template <bool is_numeric>
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static inline void expandEncodingAfterAltPrefix(
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const ExpandContext &ctx, char *p, uint16_t extraKeyState) {
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auto appendId = [&](char *&ptr) {
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const auto idstr = decOfInt(ctx.e.id);
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ASSERT(ptr <= ctx.bufferEnd - idstr.size());
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std::copy(idstr.data(), idstr.data() + idstr.size(), ptr);
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ptr += idstr.size();
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};
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ASSERT(p <= ctx.bufferEnd - 2);
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*p++ = '\x1b';
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*p++ = ctx.e.prefix;
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if (ctx.e.modifiers & kBare) {
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char *q = p;
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if (is_numeric) {
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appendId(q);
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expandNumericEncodingSuffix(ctx, q, extraKeyState);
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} else {
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ASSERT(q <= ctx.bufferEnd - 1);
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*q++ = ctx.e.id;
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setEncoding(ctx, q, extraKeyState);
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}
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}
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if (ctx.e.modifiers & kBareMod) {
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ASSERT(!is_numeric && "kBareMod is invalid with numeric sequences");
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for (int mod = 2; mod <= 8; ++mod) {
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char *q = p;
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ASSERT(q <= ctx.bufferEnd - 2);
|
|
*q++ = '0' + mod;
|
|
*q++ = ctx.e.id;
|
|
setEncoding(ctx, q, extraKeyState | keyStateForMod(mod));
|
|
}
|
|
}
|
|
if (ctx.e.modifiers & kSemiMod) {
|
|
for (int mod = 2; mod <= 8; ++mod) {
|
|
char *q = p;
|
|
if (is_numeric) {
|
|
appendId(q);
|
|
ASSERT(q <= ctx.bufferEnd - 2);
|
|
*q++ = ';';
|
|
*q++ = '0' + mod;
|
|
expandNumericEncodingSuffix(
|
|
ctx, q, extraKeyState | keyStateForMod(mod));
|
|
} else {
|
|
ASSERT(q <= ctx.bufferEnd - 4);
|
|
*q++ = '1';
|
|
*q++ = ';';
|
|
*q++ = '0' + mod;
|
|
*q++ = ctx.e.id;
|
|
setEncoding(ctx, q, extraKeyState | keyStateForMod(mod));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <bool is_numeric>
|
|
static inline void expandEncoding(const ExpandContext &ctx) {
|
|
if (ctx.e.alt_prefix_allowed) {
|
|
// For better or for worse, this code expands all of:
|
|
// * ESC [ <key> -- <key>
|
|
// * ESC ESC [ <key> -- Alt-<key>
|
|
// * ESC [ 1 ; 3 <key> -- Alt-<key>
|
|
// * ESC ESC [ 1 ; 3 <key> -- Alt-<key> specified twice
|
|
// I suspect no terminal actually emits the last one (i.e. specifying
|
|
// the Alt modifier using both methods), but I have seen a terminal
|
|
// that emitted a prefix ESC for Alt and a non-Alt modifier.
|
|
char *p = ctx.buffer;
|
|
ASSERT(p <= ctx.bufferEnd - 1);
|
|
*p++ = '\x1b';
|
|
expandEncodingAfterAltPrefix<is_numeric>(ctx, p, LEFT_ALT_PRESSED);
|
|
}
|
|
expandEncodingAfterAltPrefix<is_numeric>(ctx, ctx.buffer, 0);
|
|
}
|
|
|
|
template <bool is_numeric, size_t N>
|
|
static void addEscapes(InputMap &inputMap, const EscapeEncoding (&encodings)[N]) {
|
|
char buffer[32];
|
|
for (size_t i = 0; i < DIM(encodings); ++i) {
|
|
ExpandContext ctx = {
|
|
inputMap, encodings[i],
|
|
buffer, buffer + sizeof(buffer)
|
|
};
|
|
expandEncoding<is_numeric>(ctx);
|
|
}
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
void addDefaultEntriesToInputMap(InputMap &inputMap) {
|
|
addEscapes<false>(inputMap, escapeLetterEncodings);
|
|
addEscapes<true>(inputMap, escapeNumericEncodings);
|
|
addSimpleEntries(inputMap);
|
|
}
|