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-rw-r--r--prototypes/connections/module.c8
-rw-r--r--prototypes/connections/module.h4
-rw-r--r--prototypes/connections/test-module.c49
3 files changed, 56 insertions, 5 deletions
diff --git a/prototypes/connections/module.c b/prototypes/connections/module.c
index 5e2b98f..7af1d5c 100644
--- a/prototypes/connections/module.c
+++ b/prototypes/connections/module.c
@@ -356,8 +356,11 @@ PURE_COLD PureResult pure_module_load(const void *bytes, size_t size, PureModule
out->initial[i] = read_double(at + 8);
if (!isfinite(out->initial[i])) REFUSE("non-finite initial value", i);
} else {
- if (read32(at + 12) || read32(at + 8) > UINT16_MAX) REFUSE("state reference", i);
+ uint32_t flags = read32(at + 12);
+ if ((flags && (out->state_type[i] != PURE_STATE_CURSOR || flags != PURE_CURSOR_STAYS)) ||
+ read32(at + 8) > UINT16_MAX) REFUSE("state reference", i);
out->state_ref[i] = (uint16_t)read32(at + 8);
+ out->state_flags[i] = (uint8_t)flags;
}
}
for (uint32_t i = 0; i < out->collections; ++i, at += COLLECTION_BYTES) {
@@ -648,7 +651,8 @@ static void move_cursors(const PureModule *m, double *values, uint32_t text, siz
if (removed) {
if (position >= at + removed) position -= (double)removed;
else if (position > at) position = (double)at;
- } else if (position >= at) position += (double)inserted;
+ } else if (position > at || (position == at && !(m->state_flags[c] & PURE_CURSOR_STAYS)))
+ position += (double)inserted;
values[c] = position;
}
}
diff --git a/prototypes/connections/module.h b/prototypes/connections/module.h
index 16b755c..c27f836 100644
--- a/prototypes/connections/module.h
+++ b/prototypes/connections/module.h
@@ -46,6 +46,9 @@ typedef enum { PURE_FIELD_U32 = 1, PURE_FIELD_BYTES = 2 } PureFieldType;
typedef enum {
PURE_STATE_NUM = 0, PURE_STATE_TEXT = 1, PURE_STATE_CURSOR = 2, PURE_STATE_LIST = 3, PURE_STATE_INDEX = 4
} PureStateType;
+/* A cursor that stays before text inserted at it (a mark); other cursors go
+ * after it (a caret). */
+enum { PURE_CURSOR_STAYS = 1 };
/* A table view has one row per item of a list; its columns are number or
* text views evaluated for one row at a time. */
typedef enum { PURE_VIEW_NUM = 0, PURE_VIEW_TEXT = 1, PURE_VIEW_TABLE = 2 } PureViewType;
@@ -80,6 +83,7 @@ typedef struct {
char input_keys[PURE_MODULE_INPUTS][PURE_MODULE_NAME];
uint8_t state_type[PURE_MODULE_STATES];
uint16_t state_ref[PURE_MODULE_STATES]; /* text: constant; cursor: text; list: record; index: list */
+ uint8_t state_flags[PURE_MODULE_STATES]; /* cursor: PURE_CURSOR_STAYS */
PureInputShape input[PURE_MODULE_INPUTS];
PureField field[PURE_MODULE_FIELDS];
double initial[PURE_MODULE_STATES];
diff --git a/prototypes/connections/test-module.c b/prototypes/connections/test-module.c
index b0666fe..950fa88 100644
--- a/prototypes/connections/test-module.c
+++ b/prototypes/connections/test-module.c
@@ -33,7 +33,7 @@ typedef struct { uint8_t op; uint32_t arg; double value; } O;
/* Text (type 1, ref = constant), cursor (type 2, ref = text state), list
* (type 3, ref = record) and index (type 4, ref = list state) states follow
* the number states; text views follow the number views. */
-typedef struct { const char *name; uint32_t type, ref; } T;
+typedef struct { const char *name; uint32_t type, ref; } T; /* type: the state type, its flags from bit 8 */
/* A record field: a number and its default, or text (text = 1) whose
* default is the constant numbered initial. */
typedef struct { const char *name; uint32_t text; double initial; } RF;
@@ -108,7 +108,12 @@ static size_t build(unsigned char *out, Spec spec) {
p += 40;
size_t n = 0;
for (size_t i = 0; i < spec.ns; ++i) { p = put32(p, offset[n++]); p = put32(p, 0); p = put_double(p, spec.s[i].initial); }
- for (size_t i = 0; i < spec.nt; ++i) { p = put32(p, offset[n++]); p = put32(p, spec.t[i].type); p = put32(p, spec.t[i].ref); p = put32(p, 0); }
+ for (size_t i = 0; i < spec.nt; ++i) {
+ p = put32(p, offset[n++]);
+ p = put32(p, spec.t[i].type & 0xFF);
+ p = put32(p, spec.t[i].ref);
+ p = put32(p, spec.t[i].type >> 8);
+ }
for (size_t i = 0; i < spec.nc; ++i) { p = put32(p, offset[n++]); p = put32(p, 1); p = put32(p, 1); }
uint32_t field_offsets[64], field_start = 0;
size_t nf = 0;
@@ -1714,6 +1719,43 @@ static void deferred(void) {
deferred_messages();
}
+/* Text inserted at a cursor goes before it; at a mark (a cursor that stays),
+ * after it. Everywhere else, and when text is removed, both move alike. */
+static void marks(void) {
+ enum { MARK = 2 | PURE_CURSOR_STAYS << 8 };
+ static const T textual[] = {{"note", 1, 0}, {"at", 2, 0}, {"mark", MARK, 0}};
+ static const char *const constants[] = {"ab"};
+ static const I inputs[] = {{"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("keep", "KeyK"), KEY("back", "Backspace")};
+ static const O code[] = {
+ {CUL, 1, 0}, {TI, 0, 0}, {TINS, 0, 0}, /* 0 typed: at the cursor */
+ {CUL, 1, 0}, {CS, 2, 0}, /* 3 keep: mark = at */
+ {CUL, 1, 0}, {C, 0, -1}, {CM, 0, 0}, {CUL, 1, 0}, {TREM, 0, 0}, /* 5 back */
+ };
+ static const H handlers[] = {{1, 0, 3}, {3, 3, 2}, {5, 5, 5}};
+ Spec spec = {NULL, 0, inputs, LEN(inputs), NULL, 0, handlers, LEN(handlers), code, LEN(code),
+ NULL, 0, textual, 3, constants, 1, NULL, 0, NULL, 0, NULL, 0};
+ if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); }
+ CHECK(module_a.state_flags[2] == PURE_CURSOR_STAYS && !module_a.state_flags[1]);
+ PureApp app;
+ CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK);
+ CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"x", 1}) == PURE_OK);
+ CHECK(!strcmp(state_text(&app, 0), "xab") && app.values[1] == 1 && app.values[2] == 0); /* the mark stayed */
+ CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 1);
+ CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"yz", 2}) == PURE_OK);
+ CHECK(!strcmp(state_text(&app, 0), "xyzab") && app.values[1] == 3 && app.values[2] == 1);
+ CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 2 && app.values[2] == 1);
+ CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 1 && app.values[2] == 1); /* gathered */
+ pure_app_stop(&app);
+ /* A flag only on a cursor, and only this one. */
+ static const T wrong_flag[] = {{"note", 1, 0}, {"at", 2 | 2 << 8, 0}, {"mark", MARK, 0}};
+ static const T flagged_text[] = {{"note", 1 | PURE_CURSOR_STAYS << 8, 0}, {"at", 2, 0}, {"mark", 2, 0}};
+ Spec bad = spec;
+ bad.t = wrong_flag;
+ CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference"));
+ bad.t = flagged_text;
+ CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference"));
+}
+
/* A host points at an item: the index a view shows as its position moves
* there, as an event with no handler, saved like a key event; deferred, it
* joins the burst and a failed save undoes it with the rest. */
@@ -1751,6 +1793,7 @@ int main(void) {
messages();
message_mutations();
texts();
+ marks();
text_mutations();
lists();
pointing();
@@ -1760,6 +1803,6 @@ int main(void) {
stored_states();
deferred();
printf("{\"sizeof_module\":%zu,\"sizeof_app\":%zu}\n", sizeof(PureModule), sizeof(PureApp));
- puts("{\"module_tests\":\"verified-load-atomic-events-faults-signed-zero-if-else-replace-by-name-rejections-mutations-messages-documents-typed-verification-text-cursors-utf8-views-rollback-replace-lists-indices-undo-migration-joins-tables-columns-pick-slide-stored-equivalence-crashes-frames-messages-migration-deferred-bursts-pointing\"}");
+ puts("{\"module_tests\":\"verified-load-atomic-events-faults-signed-zero-if-else-replace-by-name-rejections-mutations-messages-documents-typed-verification-text-cursors-utf8-views-rollback-replace-lists-indices-undo-migration-joins-tables-columns-pick-slide-stored-equivalence-crashes-frames-messages-migration-deferred-bursts-pointing-marks\"}");
return 0;
}
generated by cgit v1.2.3 (git 2.46.0) at 2026-10-20 11:26:25 +0000