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fix(messages): stop clipping long received messages

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Message history buffers were smaller than the over-the-air maximum, so long
messages lost their tail on display. Channel messages carry the sender
embedded as "Name: body" in the payload (up to MAX_TEXT_LEN = 160 B), but
ChHistEntry::text was only 140 B; DmHistEntry::text was just 80 B — and with
Polish text each accented char is two UTF-8 bytes, so the effective limit was
roughly half the visible characters.

Size both history buffers (and the fullscreen/preview split copies) to
MAX_TEXT_LEN + 1 so a full-length message is stored and shown intact. Sender
split buffers widened to the 32-char name limit.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-06-04 12:10:26 +02:00
parent 54b07a5941
commit 606f28c34a
1 changed files with 13 additions and 6 deletions
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19
examples/companion_radio/ui-new/QuickMsgScreen.h
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@@ -78,12 +78,19 @@ class QuickMsgScreen : public UIScreen {
bool _share_mode = false;
char _share_text[160] = "";
struct ChHistEntry { uint8_t ch_idx; char text[140]; uint32_t timestamp; };
// History text holds a full received message. Channel messages carry the
// sender embedded as "Name: body" in the payload, so a message can be up to
// the over-the-air maximum (MAX_TEXT_LEN). Size the buffers to that + NUL,
// otherwise long messages (and Polish text, where each accented char is two
// UTF-8 bytes) get their tail clipped.
static const int MSG_TEXT_BUF = MAX_TEXT_LEN + 1;
struct ChHistEntry { uint8_t ch_idx; char text[MSG_TEXT_BUF]; uint32_t timestamp; };
ChHistEntry _hist[CH_HIST_MAX];
int _hist_head, _hist_count;
// DM_HIST
struct DmHistEntry { uint8_t prefix[4]; uint8_t outgoing; char text[80]; uint32_t timestamp; };
struct DmHistEntry { uint8_t prefix[4]; uint8_t outgoing; char text[MSG_TEXT_BUF]; uint32_t timestamp; };
static const int DM_HIST_MAX = 64;
DmHistEntry _dm_hist[DM_HIST_MAX];
int _dm_hist_head, _dm_hist_count;
@@ -891,9 +898,9 @@ public:
if (ring_pos >= 0) {
const char* ftext = _hist[ring_pos].text;
const char* fsep = strstr(ftext, ": ");
char fsender[22], fmsg[140];
char fsender[33], fmsg[MSG_TEXT_BUF];
if (fsep) {
int nl = fsep - ftext; if (nl > 21) nl = 21;
int nl = fsep - ftext; if (nl > (int)sizeof(fsender) - 1) nl = sizeof(fsender) - 1;
strncpy(fsender, ftext, nl); fsender[nl] = '\0';
strncpy(fmsg, fsep + 2, sizeof(fmsg) - 1); fmsg[sizeof(fmsg)-1] = '\0';
} else {
@@ -963,9 +970,9 @@ public:
const char* text = _hist[ring_pos].text;
const char* sep = strstr(text, ": ");
char sender[22], msg_part[140];
char sender[33], msg_part[MSG_TEXT_BUF];
if (sep) {
int nl = sep - text; if (nl > 21) nl = 21;
int nl = sep - text; if (nl > (int)sizeof(sender) - 1) nl = sizeof(sender) - 1;
strncpy(sender, text, nl); sender[nl] = '\0';
strncpy(msg_part, sep + 2, sizeof(msg_part) - 1);
msg_part[sizeof(msg_part) - 1] = '\0';