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-rw-r--r--libterminput_read.c653
1 files changed, 653 insertions, 0 deletions
diff --git a/libterminput_read.c b/libterminput_read.c
new file mode 100644
index 0000000..50095bd
--- /dev/null
+++ b/libterminput_read.c
@@ -0,0 +1,653 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+static int
+read_input(int fd, struct input *input, struct libterminput_state *ctx)
+{
+ unsigned char c, tc;
+ ssize_t r;
+
+ /* Get next byte from input */
+ if (ctx->stored_head != ctx->stored_tail) {
+ c = ((unsigned char *)ctx->stored)[ctx->stored_tail++];
+ if (ctx->stored_tail == ctx->stored_head)
+ ctx->stored_tail = ctx->stored_head = 0;
+ } else {
+ r = read(fd, ctx->stored, sizeof(ctx->stored));
+ if (r <= 0)
+ return (int)r;
+ c = (unsigned char)ctx->stored[0];
+ if (r > 1) {
+ ctx->stored_tail = 1;
+ ctx->stored_head = (size_t)r;
+ }
+ }
+
+again:
+ if (ctx->n) {
+ /* Continuation of multibyte-character */
+ if ((c & 0xC0) != 0x80) {
+ /* Short multibyte-character: return short and store read byte from next input */
+ input->mods = ctx->mods;
+ ctx->partial[(unsigned char)ctx->npartial] = '\0';
+ ctx->n = 0;
+ ctx->npartial = 0;
+ ctx->mods = 0;
+ ctx->stored[ctx->stored_head++] = (char)c;
+ strcpy(input->symbol, ctx->partial);
+ return 1;
+ } else {
+ /* Store byte, and if done, return */
+ ctx->partial[(unsigned char)ctx->npartial++] = (char)c;
+ if (ctx->npartial == ctx->n) {
+ ctx->partial[(unsigned char)ctx->npartial] = '\0';
+ input->mods = ctx->mods;
+ ctx->npartial = 0;
+ ctx->mods = 0;
+ ctx->n = 0;
+ strcpy(input->symbol, ctx->partial);
+ return 1;
+ }
+ }
+ } else if (c == 033 && !*ctx->key) {
+ /* ESC at the beginning, save as a Meta/ESC (for default behaviour) */
+ if ((ctx->flags & LIBTERMINPUT_ESC_ON_BLOCK) && ctx->stored_tail == ctx->stored_head) {
+ input->symbol[0] = (char)c;
+ input->symbol[1] = '\0';
+ input->mods = ctx->mods;
+ ctx->mods = 0;
+ return 1;
+ }
+ ctx->meta += 1;
+ } else if (c == 0) {
+ /* CTRL on Space */
+ input->symbol[0] = ' ';
+ input->symbol[1] = '\0';
+ input->mods = ctx->mods | LIBTERMINPUT_CTRL;
+ ctx->mods = 0;
+ return 1;
+ } else if (c < (unsigned char)' ' && (char)c != '\t' && (char)c != '\b' && (char)c != '\n') {
+ /* CTRL on some some character key */
+ input->symbol[0] = (char)c + '@';
+ input->symbol[1] = '\0';
+ input->mods = ctx->mods | LIBTERMINPUT_CTRL;
+ ctx->mods = 0;
+ return 1;
+ } else if ((c & 0xC0) == 0xC0 && c != 0xFF) {
+ /* Beginning of multibyte-character */
+ ctx->n = 0;
+ for (tc = c; tc & 0x80; tc <<= 1)
+ ctx->n++;
+ if (ctx->n > 6) {
+ /* If overlong, return first byte a single-byte-character */
+ input->symbol[0] = (char)c;
+ input->symbol[1] = '\0';
+ input->mods = ctx->mods;
+ ctx->mods = 0;
+ return 1;
+ }
+ ctx->partial[0] = (char)c;
+ ctx->npartial = 1;
+ } else if (c & 0x80) {
+ /* 8th bit set to signify META */
+ c ^= 0x80;
+ ctx->mods |= LIBTERMINPUT_META;
+ goto again;
+ } else {
+ /* Single-byte-character */
+ input->symbol[0] = (char)c;
+ input->symbol[1] = '\0';
+ input->mods = ctx->mods;
+ ctx->mods = 0;
+ return 1;
+ }
+
+ input->symbol[0] = '\0';
+ input->mods = -1;
+ return 1;
+}
+
+
+static void
+parse_sequence(union libterminput_input *input, struct libterminput_state *ctx)
+{
+ unsigned long long int *nums, numsbuf[6];
+ size_t keylen, n, nnums = 0, pos;
+ char *p;
+
+ /* Get number of numbers in the sequence, and allocate an array of at least 2 */
+ if (ctx->key[0] == '[' && (ctx->key[1] == '<' ? isdigit(ctx->key[2]) : isdigit(ctx->key[1])))
+ nnums += 1;
+ for (n = 2, p = ctx->key; *p; p++) {
+ if (*p == ';') {
+ n += 1;
+ nnums += 1;
+ }
+ }
+ nums = alloca(n * sizeof(*nums));
+ nums[0] = nums[1] = 0;
+
+ /* Read numbers and remove numbers and delimiters */
+ for (keylen = 0, n = 0, p = ctx->key; *p; p++) {
+ if (*p == ';') {
+ nums[++n] = 0; /* We made sure above to allocate one extra */
+ } else if (!isdigit(*p)) {
+ ctx->key[keylen++] = *p;
+ } else if (n < 3) {
+ if (nums[n] < (ULLONG_MAX - (*p & 15)) / 10)
+ nums[n] = nums[n] * 10 + (*p & 15);
+ else
+ nums[n] = ULLONG_MAX;
+ }
+ }
+ ctx->key[keylen] = '\0';
+
+ /* Get times and mods, and reset symbol, and more as keypress */
+ input->type = LIBTERMINPUT_KEYPRESS;
+ input->keypress.symbol[0] = '\0';
+ input->keypress.times = nums[0] + !nums[0];
+ input->keypress.mods = nums[1] > 1 ? nums[1] - 1 : 0;
+ input->keypress.mods |= ctx->meta > 1 ? LIBTERMINPUT_META : 0;
+
+ switch (ctx->key[0]) {
+ case '[':
+ switch (keylen) {
+ case 2:
+ switch (ctx->key[1]) {
+ case 'A': input->keypress.key = LIBTERMINPUT_UP; break;
+ case 'B': input->keypress.key = LIBTERMINPUT_DOWN; break;
+ case 'C': input->keypress.key = LIBTERMINPUT_RIGHT; break;
+ case 'D': input->keypress.key = LIBTERMINPUT_LEFT; break;
+ case 'E': input->keypress.key = LIBTERMINPUT_BEGIN; break;
+ case 'F': input->keypress.key = LIBTERMINPUT_END; break;
+ case 'G': input->keypress.key = LIBTERMINPUT_BEGIN; break;
+ case 'H': input->keypress.key = LIBTERMINPUT_HOME; break;
+ case 'M':
+ if (ctx->flags & LIBTERMINPUT_MACRO_ON_CSI_M) {
+ input->keypress.key = LIBTERMINPUT_MACRO;
+ } else if (nnums >= 3) {
+ /* Parsing for \e[?1000;1015h output. */
+ nums[0] -= 32ULL;
+ decimal_mouse_tracking_set_press:
+ input->mouseevent.event = LIBTERMINPUT_PRESS;
+ decimal_mouse_tracking:
+ input->mouseevent.type = LIBTERMINPUT_MOUSEEVENT;
+ input->mouseevent.x = (size_t)nums[1] + (size_t)!nums[1];
+ input->mouseevent.y = (size_t)nums[2] + (size_t)!nums[2];
+ input->mouseevent.mods = (enum libterminput_mod)((nums[0] >> 2) & 7ULL);
+ if (nums[0] & 32)
+ input->mouseevent.event = LIBTERMINPUT_MOTION;
+ nums[0] = (nums[0] & 3ULL) | ((nums[0] >> 4) & ~3ULL);
+ if (nums[0] < 4) {
+ nums[0] = (nums[0] + 1) & 3;
+ if (!nums[0] && input->mouseevent.event == LIBTERMINPUT_PRESS) {
+ input->mouseevent.event = LIBTERMINPUT_RELEASE;
+ nums[0] = 1;
+ }
+ }
+ input->mouseevent.button = (enum libterminput_button)nums[0];
+ } else if (!nnums & !(ctx->flags & LIBTERMINPUT_DECSET_1005)) {
+ /* Parsing output for legacy mouse tracking output. */
+ ctx->mouse_tracking = 0;
+ nums = numsbuf;
+ nums[0] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[1] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[2] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[0] = (nums[0] - 32ULL) & 255ULL;
+ nums[1] = (nums[1] - 32ULL) & 255ULL;
+ nums[2] = (nums[2] - 32ULL) & 255ULL;
+ if (ctx->stored_head == ctx->stored_tail)
+ ctx->stored_head = ctx->stored_tail = 0;
+ goto decimal_mouse_tracking_set_press;
+ } else if (!nnums) {
+ /* Parsing for semi-legacy \e[?1000;1005h output. */
+ ctx->mouse_tracking = 0;
+ nums = numsbuf;
+ pos = ctx->stored_tail;
+ if ((nums[0] = libterminput_utf8_decode__(ctx->stored, &ctx->stored_tail)) < 32 ||
+ (nums[1] = libterminput_utf8_decode__(ctx->stored, &ctx->stored_tail)) < 32 ||
+ (nums[2] = libterminput_utf8_decode__(ctx->stored, &ctx->stored_tail)) < 32) {
+ ctx->stored_tail = pos;
+ input->keypress.key = LIBTERMINPUT_MACRO;
+ return;
+ }
+ nums[0] = nums[0] - 32ULL;
+ nums[1] = nums[1] - 32ULL;
+ nums[2] = nums[2] - 32ULL;
+ if (ctx->stored_head == ctx->stored_tail)
+ ctx->stored_head = ctx->stored_tail = 0;
+ goto decimal_mouse_tracking_set_press;
+ } else {
+ goto suppress;
+ }
+ break;
+ case 'P':
+ input->keypress.key = LIBTERMINPUT_F1;
+ if (ctx->flags & LIBTERMINPUT_PAUSE_ON_CSI_P)
+ input->keypress.key = LIBTERMINPUT_PAUSE;
+ break;
+ case 'Q':
+ input->keypress.key = LIBTERMINPUT_F2;
+ break;
+ case 'R':
+ if ((ctx->flags & LIBTERMINPUT_AWAITING_CURSOR_POSITION) && nnums >= 2) {
+ input->position.type = LIBTERMINPUT_CURSOR_POSITION;
+ input->position.y = (size_t)nums[0] + (size_t)!nums[0];
+ input->position.x = (size_t)nums[1] + (size_t)!nums[1];
+ } else {
+ input->keypress.key = LIBTERMINPUT_F3;
+ }
+ break;
+ case 'S':
+ input->keypress.key = LIBTERMINPUT_F4;
+ break;
+ case 'T':
+ /* Parsing output for legacy mouse highlight tracking output. (\e[?1001h) */
+ ctx->mouse_tracking = 0;
+ nums = numsbuf;
+ nums[0] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[1] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[2] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[3] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[4] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[5] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[0] = (nums[0] - 32ULL) & 255ULL;
+ nums[1] = (nums[1] - 32ULL) & 255ULL;
+ nums[2] = (nums[2] - 32ULL) & 255ULL;
+ nums[3] = (nums[3] - 32ULL) & 255ULL;
+ nums[4] = (nums[4] - 32ULL) & 255ULL;
+ nums[5] = (nums[5] - 32ULL) & 255ULL;
+ if (ctx->stored_head == ctx->stored_tail)
+ ctx->stored_head = ctx->stored_tail = 0;
+ input->mouseevent.type = LIBTERMINPUT_MOUSEEVENT;
+ input->mouseevent.event = LIBTERMINPUT_HIGHLIGHT_OUTSIDE;
+ input->mouseevent.mods = 0;
+ input->mouseevent.button = LIBTERMINPUT_BUTTON1;
+ input->mouseevent.start_x = (size_t)nums[0] + (size_t)!nums[0];
+ input->mouseevent.start_y = (size_t)nums[1] + (size_t)!nums[1];
+ input->mouseevent.end_x = (size_t)nums[2] + (size_t)!nums[2];
+ input->mouseevent.end_y = (size_t)nums[3] + (size_t)!nums[3];
+ input->mouseevent.x = (size_t)nums[4] + (size_t)!nums[4];
+ input->mouseevent.y = (size_t)nums[5] + (size_t)!nums[5];
+ break;
+ case 'U': input->keypress.key = LIBTERMINPUT_NEXT; break;
+ case 'V': input->keypress.key = LIBTERMINPUT_PRIOR; break;
+ case 'Z':
+ if (!(ctx->flags & LIBTERMINPUT_SEPARATE_BACKTAB)) {
+ input->keypress.key = LIBTERMINPUT_TAB;
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ } else {
+ input->keypress.key = LIBTERMINPUT_BACKTAB;
+ }
+ break;
+ case 'a':
+ input->keypress.key = LIBTERMINPUT_UP;
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ break;
+ case 'b':
+ input->keypress.key = LIBTERMINPUT_DOWN;
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ break;
+ case 'c':
+ input->keypress.key = LIBTERMINPUT_RIGHT;
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ break;
+ case 'd':
+ input->keypress.key = LIBTERMINPUT_LEFT;
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ break;
+ case 'n':
+ if (nnums == 1 && nums[0] == 0) {
+ input->type = LIBTERMINPUT_TERMINAL_IS_OK;
+ } else if (nnums == 1 && nums[0] == 3) {
+ input->type = LIBTERMINPUT_TERMINAL_IS_NOT_OK;
+ } else {
+ goto suppress;
+ }
+ break;
+ case 't':
+ /* Parsing output for legacy mouse highlight tracking output (\e[?1001h). */
+ ctx->mouse_tracking = 0;
+ nums = numsbuf;
+ nums[0] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[1] = (unsigned long long int)(unsigned char)ctx->stored[ctx->stored_tail++];
+ nums[0] = (nums[0] - 32ULL) & 255ULL;
+ nums[1] = (nums[1] - 32ULL) & 255ULL;
+ if (ctx->stored_head == ctx->stored_tail)
+ ctx->stored_head = ctx->stored_tail = 0;
+ input->mouseevent.type = LIBTERMINPUT_MOUSEEVENT;
+ input->mouseevent.event = LIBTERMINPUT_HIGHLIGHT_INSIDE;
+ input->mouseevent.mods = 0;
+ input->mouseevent.button = LIBTERMINPUT_BUTTON1;
+ input->mouseevent.x = (size_t)nums[0] + (size_t)!nums[0];
+ input->mouseevent.y = (size_t)nums[1] + (size_t)!nums[1];
+ break;
+ case 'u':
+ if (nums[0] > 0x10FFFFULL || (nums[0] & 0xFFF800ULL) == 0xD800ULL) {
+ input->type = LIBTERMINPUT_NONE;
+ break;
+ }
+ libterminput_encode_utf8__(nums[0], input->keypress.symbol);
+ input->keypress.times = 1;
+ break;
+ case '$':
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ if (nums[0] >= 200)
+ goto suppress;
+ goto tilde_case;
+ case '@':
+ if (ctx->flags & LIBTERMINPUT_INS_ON_CSI_AT) {
+ input->keypress.key = LIBTERMINPUT_INS;
+ break;
+ }
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ /* fall through */
+ case '^':
+ input->keypress.mods |= LIBTERMINPUT_CTRL;
+ if (nums[0] >= 200)
+ goto suppress;
+ /* fall through */
+ case '~':
+ tilde_case:
+ input->keypress.times = 1;
+ switch (nums[0]) {
+ case 1: input->keypress.key = LIBTERMINPUT_HOME; break;
+ case 2: input->keypress.key = LIBTERMINPUT_INS; break;
+ case 3: input->keypress.key = LIBTERMINPUT_DEL; break;
+ case 4: input->keypress.key = LIBTERMINPUT_END; break;
+ case 5: input->keypress.key = LIBTERMINPUT_PRIOR; break;
+ case 6: input->keypress.key = LIBTERMINPUT_NEXT; break;
+ case 7: input->keypress.key = LIBTERMINPUT_HOME; break;
+ case 8: input->keypress.key = LIBTERMINPUT_END; break;
+ case 9: input->keypress.key = LIBTERMINPUT_ESC; break; /* just made this one up */
+ case 11: input->keypress.key = LIBTERMINPUT_F1; break;
+ case 12: input->keypress.key = LIBTERMINPUT_F2; break;
+ case 13: input->keypress.key = LIBTERMINPUT_F3; break;
+ case 14: input->keypress.key = LIBTERMINPUT_F4; break;
+ case 15: input->keypress.key = LIBTERMINPUT_F5; break;
+ case 17: input->keypress.key = LIBTERMINPUT_F6; break;
+ case 18: input->keypress.key = LIBTERMINPUT_F7; break;
+ case 19: input->keypress.key = LIBTERMINPUT_F8; break;
+ case 20: input->keypress.key = LIBTERMINPUT_F9; break;
+ case 21: input->keypress.key = LIBTERMINPUT_F10; break;
+ case 23: input->keypress.key = LIBTERMINPUT_F11; break;
+ case 24: input->keypress.key = LIBTERMINPUT_F12; break;
+ case 25: input->keypress.key = LIBTERMINPUT_F1; break;
+ case 26: input->keypress.key = LIBTERMINPUT_F2; break;
+ case 28: input->keypress.key = LIBTERMINPUT_F3; break;
+ case 29: input->keypress.key = LIBTERMINPUT_F4; break;
+ case 31: input->keypress.key = LIBTERMINPUT_F5; break;
+ case 32: input->keypress.key = LIBTERMINPUT_F6; break;
+ case 33: input->keypress.key = LIBTERMINPUT_F7; break;
+ case 34: input->keypress.key = LIBTERMINPUT_F8; break;
+ case 200:
+ ctx->bracketed_paste = 1;
+ input->type = LIBTERMINPUT_BRACKETED_PASTE_START;
+ return;
+ case 201:
+ ctx->bracketed_paste = 0;
+ input->type = LIBTERMINPUT_BRACKETED_PASTE_END;
+ return;
+ default:
+ goto suppress;
+ }
+ if (25 <= nums[0] && nums[0] <= 34)
+ input->keypress.mods |= LIBTERMINPUT_SHIFT;
+ break;
+ default:
+ goto suppress;
+ }
+ break;
+ case 3:
+ switch (ctx->key[1] == '[' ? ctx->key[2] : 0) {
+ case 'A': input->keypress.key = LIBTERMINPUT_F1; break;
+ case 'B': input->keypress.key = LIBTERMINPUT_F2; break;
+ case 'C': input->keypress.key = LIBTERMINPUT_F3; break;
+ case 'D': input->keypress.key = LIBTERMINPUT_F4; break;
+ case 'E': input->keypress.key = LIBTERMINPUT_F5; break;
+ default:
+ if (ctx->key[1] == '<' && (ctx->key[2] == 'M' || ctx->key[2] == 'm') && nnums >= 3) {
+ /* Parsing for \e[?1003;1006h output. */
+ input->mouseevent.event = LIBTERMINPUT_PRESS;
+ if (ctx->key[2] == 'm')
+ input->mouseevent.event = LIBTERMINPUT_RELEASE;
+ goto decimal_mouse_tracking;
+ } else {
+ goto suppress;
+ }
+ }
+ break;
+ default:
+ goto suppress;
+ }
+ break;
+
+ case 'O':
+ switch (!ctx->key[2] ? ctx->key[1] : 0) {
+ case 'A': input->keypress.key = LIBTERMINPUT_UP; break;
+ case 'B': input->keypress.key = LIBTERMINPUT_DOWN; break;
+ case 'C': input->keypress.key = LIBTERMINPUT_RIGHT; break;
+ case 'D': input->keypress.key = LIBTERMINPUT_LEFT; break;
+ case 'E': input->keypress.key = LIBTERMINPUT_BEGIN; break; /* not attested */
+ case 'F': input->keypress.key = LIBTERMINPUT_END; break;
+ case 'G': input->keypress.key = LIBTERMINPUT_BEGIN; break; /* not attested */
+ case 'H': input->keypress.key = LIBTERMINPUT_HOME; break;
+ case 'P': input->keypress.key = LIBTERMINPUT_F1; break;
+ case 'Q': input->keypress.key = LIBTERMINPUT_F2; break;
+ case 'R': input->keypress.key = LIBTERMINPUT_F3; break;
+ case 'S': input->keypress.key = LIBTERMINPUT_F4; break;
+ case 'p': input->keypress.key = LIBTERMINPUT_KEYPAD_0; break;
+ case 'q': input->keypress.key = LIBTERMINPUT_KEYPAD_1; break;
+ case 'r': input->keypress.key = LIBTERMINPUT_KEYPAD_2; break;
+ case 's': input->keypress.key = LIBTERMINPUT_KEYPAD_3; break;
+ case 't': input->keypress.key = LIBTERMINPUT_KEYPAD_4; break;
+ case 'u': input->keypress.key = LIBTERMINPUT_KEYPAD_5; break;
+ case 'v': input->keypress.key = LIBTERMINPUT_KEYPAD_6; break;
+ case 'w': input->keypress.key = LIBTERMINPUT_KEYPAD_7; break;
+ case 'x': input->keypress.key = LIBTERMINPUT_KEYPAD_8; break;
+ case 'y': input->keypress.key = LIBTERMINPUT_KEYPAD_9; break;
+ case 'k': input->keypress.key = LIBTERMINPUT_KEYPAD_PLUS; break;
+ case 'm': input->keypress.key = LIBTERMINPUT_KEYPAD_MINUS; break;
+ case 'j': input->keypress.key = LIBTERMINPUT_KEYPAD_TIMES; break;
+ case 'o': input->keypress.key = LIBTERMINPUT_KEYPAD_DIVISION; break;
+ case 'n': input->keypress.key = LIBTERMINPUT_KEYPAD_DECIMAL; break;
+ case 'l': input->keypress.key = LIBTERMINPUT_KEYPAD_COMMA; break;
+ case 'b': input->keypress.key = LIBTERMINPUT_KEYPAD_POINT; break;
+ case 'M': input->keypress.key = LIBTERMINPUT_KEYPAD_ENTER; break;
+ default:
+ goto suppress;
+ }
+ break;
+
+ default:
+ /* This shouldn't happen (without goto) */
+ suppress:
+ input->type = LIBTERMINPUT_NONE;
+ break;
+ }
+}
+
+
+int
+libterminput_read(int fd, union libterminput_input *input, struct libterminput_state *ctx)
+{
+ struct input ret;
+ size_t n, m;
+ char *p;
+ int r;
+ ssize_t rd;
+
+ if (!ctx->inited) {
+ ctx->inited = 1;
+ memset(input, 0, sizeof(*input));
+ } else if (input->type == LIBTERMINPUT_KEYPRESS && input->keypress.times > 1) {
+ input->keypress.times -= 1;
+ return 1;
+ }
+
+ if (ctx->bracketed_paste)
+ return libterminput_read_bracketed_paste__(fd, input, ctx);
+ if (!ctx->mouse_tracking) {
+ r = read_input(fd, &ret, ctx);
+ if (r <= 0)
+ return r;
+ } else if (ctx->mouse_tracking == 1) {
+ if (ctx->stored_tail == sizeof(ctx->stored)) {
+ memmove(ctx->stored, &ctx->stored[ctx->stored_tail], ctx->stored_head - ctx->stored_tail);
+ ctx->stored_tail -= ctx->stored_head;
+ ctx->stored_head = 0;
+ }
+ rd = read(fd, &ctx->stored[ctx->stored_head], 1);
+ if (rd <= 0)
+ return (int)rd;
+ ctx->stored_head += 1;
+ p = strchr(ctx->key, '\0');
+ goto continue_incomplete;
+ } else {
+ if (ctx->stored_tail > sizeof(ctx->stored) - (size_t)ctx->mouse_tracking) {
+ memmove(ctx->stored, &ctx->stored[ctx->stored_tail], ctx->stored_head - ctx->stored_tail);
+ ctx->stored_tail -= ctx->stored_head;
+ ctx->stored_head = 0;
+ }
+ rd = read(fd, &ctx->stored[ctx->stored_head], (size_t)ctx->mouse_tracking - (ctx->stored_head - ctx->stored_tail));
+ if (rd <= 0)
+ return (int)rd;
+ ctx->stored_head += (size_t)rd;
+ p = strchr(ctx->key, '\0');
+ goto continue_incomplete;
+ }
+
+again:
+ if (!*ret.symbol) {
+ /* Incomplete input */
+ if (ctx->meta < 3) {
+ /* Up to two Meta/ESC, wait until a third or something else is read */
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ }
+ /* Three ESC's */
+ input->type = LIBTERMINPUT_KEYPRESS;
+ input->keypress.key = LIBTERMINPUT_ESC;
+ input->keypress.times = 3;
+ input->keypress.mods = 0;
+ input->keypress.symbol[0] = '\0';
+ ctx->meta -= 3;
+ } else if (*ctx->key) {
+ /* Special keys */
+ if (ret.mods) {
+ /* Special key was aborted, restart */
+ *ctx->key = '\0';
+ goto again;
+ }
+ /* Add new input to sequence */
+ n = strlen(ctx->key);
+ m = strlen(ret.symbol);
+ if (n + m >= sizeof(ctx->key)) {
+ /* Abort if too long */
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ }
+ p = stpcpy(&ctx->key[n], ret.symbol);
+ /* Check if sequence is complete */
+ continue_incomplete:
+ if (!isalpha(p[-1]) && p[-1] != '~' && p[-1] != '@' && p[-1] != '^' && p[-1] != '$') {
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ } else if (ctx->key[0] == '[' && ctx->key[1] == '<' && p == &ctx->key[2]) {
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ } else if (ctx->key[0] == '[' && ctx->key[1] == 'M' && (ctx->flags & LIBTERMINPUT_MACRO_ON_CSI_M)) {
+ /* complete */
+ } else if (ctx->key[0] == '[' && ctx->key[1] == 'M' && (ctx->flags & LIBTERMINPUT_DECSET_1005)) {
+ ctx->mouse_tracking = 1;
+ if (ctx->stored_head == ctx->stored_tail) {
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ }
+ n = ctx->stored_tail;
+ r = libterminput_check_utf8_char__(&ctx->stored[n], ctx->stored_head - n, &m);
+ if (r <= 0)
+ goto fallback_to_none_or_macro;
+ n += m;
+ r = libterminput_check_utf8_char__(&ctx->stored[n], ctx->stored_head - n, &m);
+ if (r <= 0)
+ goto fallback_to_none_or_macro;
+ n += m;
+ r = libterminput_check_utf8_char__(&ctx->stored[n], ctx->stored_head - n, &m);
+ if (r <= 0) {
+ fallback_to_none_or_macro:
+ if (!r) {
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ }
+ ctx->mouse_tracking = 0;
+ input->type = LIBTERMINPUT_KEYPRESS;
+ input->keypress.key = LIBTERMINPUT_MACRO;
+ input->keypress.mods = ret.mods;
+ input->keypress.times = 1;
+ if (ctx->meta > 1)
+ input->keypress.mods |= LIBTERMINPUT_META;
+ ctx->meta = 0;
+ ctx->key[0] = '\0';
+ return 1;
+ }
+ } else if (ctx->key[0] == '[' && ctx->key[1] == 'M' && ctx->stored_head - ctx->stored_tail < 3) {
+ ctx->mouse_tracking = 3;
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ } else if (ctx->key[0] == '[' && ctx->key[1] == 't' && ctx->stored_head - ctx->stored_tail < 2) {
+ ctx->mouse_tracking = 2;
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ } else if (ctx->key[0] == '[' && ctx->key[1] == 'T' && ctx->stored_head - ctx->stored_tail < 6) {
+ ctx->mouse_tracking = 6;
+ input->type = LIBTERMINPUT_NONE;
+ return 1;
+ }
+ /* Parse the complete sequence */
+ parse_sequence(input, ctx);
+ /* Reset */
+ ctx->meta = 0;
+ ctx->key[0] = '\0';
+ } else if (ctx->meta && (!strcmp(ret.symbol, "[") || !strcmp(ret.symbol, "O"))) {
+ /* ESC [ or ESC 0 is used as the beginning of most special keys */
+ strcpy(ctx->key, ret.symbol);
+ input->type = LIBTERMINPUT_NONE;
+ } else {
+ /* Character input and single-byte special keys */
+ input->type = LIBTERMINPUT_KEYPRESS;
+ input->keypress.mods = ret.mods;
+ input->keypress.times = 1;
+ if (ctx->meta) {
+ /* Transfer meta modifier from state to input */
+ input->keypress.mods |= LIBTERMINPUT_META;
+ ctx->meta = 0;
+ }
+ switch (ret.symbol[1] ? 0 : ret.symbol[0]) {
+ case 127:
+ case '\b':
+ input->keypress.key = LIBTERMINPUT_ERASE;
+ input->keypress.symbol[0] = '\0';
+ break;
+ case '\t':
+ input->keypress.key = LIBTERMINPUT_TAB;
+ input->keypress.symbol[0] = '\0';
+ break;
+ case '\n':
+ input->keypress.key = LIBTERMINPUT_ENTER;
+ input->keypress.symbol[0] = '\0';
+ break;
+ case 033:
+ input->keypress.key = LIBTERMINPUT_ESC;
+ input->keypress.symbol[0] = '\0';
+ break;
+ default:
+ input->keypress.key = LIBTERMINPUT_SYMBOL;
+ strcpy(input->keypress.symbol, ret.symbol);
+ break;
+ }
+ }
+
+ return 1;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.48.0) at 2025-02-22 20:21:21 +0000