add cgi for setting background image

user/apars_osc.c

@@ -49,6 +49,10 @@ apars_handle_osc(char *buffer)
 			buffer[0] = 'G';
 			notify_growl(buffer);
 		}
+		else if (n == 70) {
+			// ESPTerm: backdrop
+			screen_set_backdrop(buffer);
+		}
 		else if (n >= 81 && n <= 85) {
 			// ESPTerm: action button label
 			screen_set_button_text(n - 80, buffer);

user/cgi_term_cfg.c

@@ -256,10 +256,16 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 
 	if (GET_ARG("term_title")) {
 		cgi_dbg("Terminal title default text: \"%s\"", buff);
-		strncpy_safe(termconf->title, buff, 64); // ATTN those must match the values in
+		strncpy_safe(termconf->title, buff, TERM_TITLE_LEN); // ATTN those must match the values in
 		topics |= TOPIC_CHANGE_TITLE;
 	}
 
+	if (GET_ARG("backdrop")) {
+		cgi_dbg("Terminal backdrop url: \"%s\"", buff);
+		strncpy_safe(termconf->backdrop, buff, TERM_BACKDROP_LEN); // ATTN those must match the values in
+		topics |= TOPIC_CHANGE_BACKDROP;
+	}
+
 	for (int btn_i = 1; btn_i <= TERM_BTN_COUNT; btn_i++) {
 		sprintf(buff, "btn%d", btn_i);
 		if (GET_ARG(buff)) {
@@ -416,7 +422,7 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 httpd_cgi_state ICACHE_FLASH_ATTR
 tplTermCfg(HttpdConnData *connData, char *token, void **arg)
 {
-#define BUFLEN TERM_TITLE_LEN
+#define BUFLEN 100 // large enough for backdrop
 	char buff[BUFLEN];
 	char buff2[10];
 
@@ -492,6 +498,9 @@ tplTermCfg(HttpdConnData *connData, char *token, void **arg)
 	else if (streq(token, "term_title")) {
 		strncpy_safe(buff, termconf->title, BUFLEN);
 	}
+	else if (streq(token, "backdrop")) {
+		strncpy_safe(buff, termconf->backdrop, BUFLEN);
+	}
 	else if (streq(token, "uart_baud")) {
 		sprintf(buff, "%d", sysconf->uart_baudrate);
 	}

user/screen.c

@@ -213,6 +213,7 @@ terminal_restore_defaults(void)
 	termconf->debugbar = SCR_DEF_DEBUGBAR;
 	termconf->allow_decopt_12 = SCR_DEF_DECOPT12;
 	termconf->ascii_debug = SCR_DEF_ASCIIDEBUG;
+	termconf->backdrop[0] = 0;
 }
 
 /**
@@ -247,6 +248,11 @@ terminal_apply_settings_noclear(void)
 		termconf->ascii_debug = SCR_DEF_ASCIIDEBUG;
 		changed = 1;
 	}
+	if (termconf->config_version < 4) {
+		persist_dbg("termconf: Updating to version %d", 1);
+		termconf->backdrop[0] = 0;
+		changed = 1;
+	}
 
 	termconf->config_version = TERMCONF_VERSION;
 
@@ -385,6 +391,7 @@ screen_reset_do(bool size, bool labels)
 
 	if (labels) {
 		strcpy(termconf_live.title, termconf->title);
+		strcpy(termconf_live.backdrop, termconf->backdrop);
 
 		for (int i = 1; i <= TERM_BTN_COUNT; i++) {
 			strcpy(termconf_live.btn[i], termconf->btn[i]);
@@ -394,7 +401,7 @@ screen_reset_do(bool size, bool labels)
 		termconf_live.show_buttons = termconf->show_buttons;
 		termconf_live.show_config_links = termconf->show_config_links;
 
-		topics |= TOPIC_CHANGE_TITLE | TOPIC_CHANGE_BUTTONS;
+		topics |= TOPIC_CHANGE_TITLE | TOPIC_CHANGE_BUTTONS | TOPIC_CHANGE_BACKDROP;
 	}
 
 	// initial values in the save buffer in case of receiving restore without storing first
@@ -1009,6 +1016,18 @@ screen_set_button_text(int num, const char *text)
 	NOTIFY_DONE(TOPIC_CHANGE_BUTTONS);
 }
 
+/**
+ * Helper function to set terminalbackdrop
+ * @param url - url
+ */
+void ICACHE_FLASH_ATTR
+screen_set_backdrop(const char *url)
+{
+	NOTIFY_LOCK();
+	strncpy(termconf_live.backdrop, url, TERM_BACKDROP_LEN);
+	NOTIFY_DONE(TOPIC_CHANGE_BACKDROP);
+}
+
 /**
  * Shift screen upwards
  */
@@ -1907,6 +1926,7 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 #define TOPICMARK_BELL    '!'
 #define TOPICMARK_CURSOR  'C'
 #define TOPICMARK_SCREEN   'S'
+#define TOPICMARK_BACKDROP 'W'
 
 	if (ss == NULL) {
 		// START!
@@ -2025,9 +2045,11 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 			bufput_c(TOPICMARK_TITLE);
 
 			int len = (int) strlen(termconf_live.title);
-			memcpy(bb, termconf_live.title, len);
+			if (len > 0) {
-			bb += len;
+				memcpy(bb, termconf_live.title, len);
-			remain -= len;
+				bb += len;
+				remain -= len;
+			}
 			bufput_c('\x01');
 		END_TOPIC
 
@@ -2038,13 +2060,27 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 
 			for (int i = 0; i < TERM_BTN_COUNT; i++) {
 				int len = (int) strlen(termconf_live.btn[i]);
-				memcpy(bb, termconf_live.btn[i], len);
+				if (len > 0) {
-				bb += len;
+					memcpy(bb, termconf_live.btn[i], len);
-				remain -= len;
+					bb += len;
+					remain -= len;
+				}
 				bufput_c('\x01');
 			}
 		END_TOPIC
 
+		BEGIN_TOPIC(TOPIC_CHANGE_BACKDROP, TERM_BACKDROP_LEN+1+1)
+			bufput_c(TOPICMARK_BACKDROP);
+
+			int len = (int) strlen(termconf_live.backdrop);
+			if (len > 0) {
+				memcpy(bb, termconf_live.backdrop, len);
+				bb += len;
+				remain -= len;
+			}
+			bufput_c('\x01');
+		END_TOPIC
+
 		BEGIN_TOPIC(TOPIC_INTERNAL, 45)
 			bufput_c(TOPICMARK_DEBUG);
 			// General flags

user/screen.h

@@ -38,6 +38,7 @@
 #define TERM_BTN_MSG_LEN 10
 #define TERM_TITLE_LEN 64
 #define TERM_BTN_COUNT 5
+#define TERM_BACKDROP_LEN 100
 
 #define SCR_DEF_DISPLAY_TOUT_MS 12
 #define SCR_DEF_DISPLAY_COOLDOWN_MS 35
@@ -74,8 +75,8 @@ enum CursorShape {
 
 // Size designed for the terminal config structure
 // Must be constant to avoid corrupting user config after upgrade
-#define TERMCONF_SIZE 300
+#define TERMCONF_SIZE 400
-#define TERMCONF_VERSION 3
+#define TERMCONF_VERSION 4
 
 typedef struct {
 	u32 width;
@@ -100,6 +101,7 @@ typedef struct {
 	bool debugbar;
 	bool allow_decopt_12;
 	bool ascii_debug;
+	char backdrop[TERM_BACKDROP_LEN];
 } TerminalConfigBundle;
 
 // Live config
@@ -148,6 +150,8 @@ void screen_resize(int rows, int cols);
 void screen_set_title(const char *title);
 /** Set a button text */
 void screen_set_button_text(int num, const char *text);
+/** Change backdrop */
+void screen_set_backdrop(const char *url);
 
 // --- Encoding ---
 
@@ -169,6 +173,7 @@ enum ScreenSerializeTopic {
 	TOPIC_CHANGE_CURSOR       = (1<<5),
 	TOPIC_INTERNAL            = (1<<6), // debugging internal state
 	TOPIC_BELL                = (1<<7), // beep
+	TOPIC_CHANGE_BACKDROP     = (1<<8),
 	TOPIC_FLAG_NOCLEAN        = (1<<15), // do not clean dirty extents
 
 	// combos
@@ -177,6 +182,7 @@ enum ScreenSerializeTopic {
 		TOPIC_CHANGE_CONTENT_ALL |
 		TOPIC_CHANGE_CURSOR |
 		TOPIC_CHANGE_TITLE |
+		TOPIC_CHANGE_BACKDROP |
 		TOPIC_CHANGE_BUTTONS,
 };
 

user/user_main.c

@@ -150,6 +150,8 @@ static void ICACHE_FLASH_ATTR user_start(void *unused)
 	// Critically important for client application if any kind of screen persistence / content re-use is needed
 	UART_WriteChar(UART0, CAN, UART_TIMEOUT_US); // 0x18 - 24 - CAN
 
+	dbg("tsize=%d", sizeof(TerminalConfigBundle));
+
 #if DEBUG_HEAP
 	// Heap use timer & blink
 	TIMER_START(&prHeapTimer, prHeapTimerCb, HEAP_TIMER_MS, 1);