source/blender/draw/intern/draw_manager.c

@@ -1137,10 +1137,6 @@ void DRW_draw_region_engine_info(int xoffset, int *yoffset, int line_height)
 {
   DRW_ENABLED_ENGINE_ITER (DST.view_data_active, engine, data) {
     if (data->info[0] != '\0') {
-      char *chr_current = data->info;
-      char *chr_start = chr_current;
-      int line_len = 0;
-
       const int font_id = BLF_default();
       UI_FontThemeColor(font_id, TH_TEXT_HI);
 
@@ -1148,24 +1144,14 @@ void DRW_draw_region_engine_info(int xoffset, int *yoffset, int line_height)
       BLF_shadow(font_id, 5, (const float[4]){0.0f, 0.0f, 0.0f, 1.0f});
       BLF_shadow_offset(font_id, 1, -1);
 
-      while (*chr_current++ != '\0') {
-        line_len++;
-        if (*chr_current == '\n') {
-          char info[GPU_INFO_SIZE];
-          BLI_strncpy(info, chr_start, line_len + 1);
-          *yoffset -= line_height;
-          BLF_draw_default(xoffset, *yoffset, 0.0f, info, sizeof(info));
-
-          /* Re-start counting. */
-          chr_start = chr_current + 1;
-          line_len = -1;
-        }
-      }
-
-      char info[GPU_INFO_SIZE];
-      BLI_strncpy(info, chr_start, line_len + 1);
-      *yoffset -= line_height;
-      BLF_draw_default(xoffset, *yoffset, 0.0f, info, sizeof(info));
+      const char *buf_step = data->info;
+      do {
+        const char *buf = buf_step;
+        buf_step = BLI_strchr_or_end(buf, '\n');
+        const int buf_len = buf_step - buf;
+        *yoffset -= line_height;
+        BLF_draw_default(xoffset, *yoffset, 0.0f, buf, buf_len);
+      } while (*buf_step ? ((void)buf_step++, true) : false);
 
       BLF_disable(font_id, BLF_SHADOW);
     }

source/blender/editors/interface/interface_query.cc

@@ -596,12 +596,8 @@ size_t ui_but_tip_len_only_first_line(const uiBut *but)
   if (but->tip == nullptr) {
     return 0;
   }
-
-  const char *str_sep = strchr(but->tip, '\n');
-  if (str_sep != nullptr) {
-    return (str_sep - but->tip);
-  }
-  return strlen(but->tip);
+  const char *str_sep = BLI_strchr_or_end(but->tip, '\n');
+  return (str_sep - but->tip);
 }
 
 /** \} */

source/blender/editors/space_console/console_ops.c

@@ -24,6 +24,7 @@
 #include "BLI_utildefines.h"
 
 #include "BKE_context.h"
+#include "BKE_report.h"
 
 #include "WM_api.h"
 #include "WM_types.h"
@@ -304,19 +305,16 @@ static void console_line_verify_length(ConsoleLine *ci, int len)
   }
 }
 
-static int console_line_insert(ConsoleLine *ci, char *str)
+static void console_line_insert(ConsoleLine *ci, const char *str, int len)
 {
-  int len = strlen(str);
-
-  if (len > 0 && str[len - 1] == '\n') { /* stop new lines being pasted at the end of lines */
-    str[len - 1] = '\0';
-    len--;
-  }
-
   if (len == 0) {
-    return 0;
+    return;
   }
 
+  BLI_assert(len <= strlen(str));
+  /* The caller must delimit new-lines. */
+  BLI_assert(str[len - 1] != '\n');
+
   console_line_verify_length(ci, len + ci->len);
 
   memmove(ci->line + ci->cursor + len, ci->line + ci->cursor, (ci->len - ci->cursor) + 1);
@@ -324,8 +322,6 @@ static int console_line_insert(ConsoleLine *ci, char *str)
 
   ci->len += len;
   ci->cursor += len;
-
-  return len;
 }
 
 /**
@@ -460,8 +456,25 @@ static int console_insert_exec(bContext *C, wmOperator *op)
     memset(str, ' ', len);
     str[len] = '\0';
   }
+  else {
+    len = strlen(str);
+  }
 
-  len = console_line_insert(ci, str);
+  /* Allow trailing newlines (but strip them). */
+  while (len > 0 && str[len - 1] == '\n') {
+    len--;
+    str[len] = '\0';
+  }
+
+  if (strchr(str, '\n')) {
+    BKE_report(op->reports, RPT_ERROR, "New lines unsupported, call this operator multiple times");
+    /* Force cancel. */
+    len = 0;
+  }
+
+  if (len != 0) {
+    console_line_insert(ci, str, len);
+  }
 
   MEM_freeN(str);
 
@@ -1076,31 +1089,28 @@ static int console_paste_exec(bContext *C, wmOperator *op)
   SpaceConsole *sc = CTX_wm_space_console(C);
   ARegion *region = CTX_wm_region(C);
   ConsoleLine *ci = console_history_verify(C);
-  int buf_len;
-
-  char *buf_str = WM_clipboard_text_get(selection, true, &buf_len);
-  char *buf_step, *buf_next;
+  int buf_str_len;
 
+  char *buf_str = WM_clipboard_text_get(selection, true, &buf_str_len);
   if (buf_str == NULL) {
     return OPERATOR_CANCELLED;
   }
-
-  buf_step = buf_str;
-
-  while ((buf_next = buf_step) && buf_next[0] != '\0') {
-    buf_step = strchr(buf_next, '\n');
-    if (buf_step) {
-      *buf_step = '\0';
-      buf_step++;
-    }
-
-    if (buf_next != buf_str) {
+  if (*buf_str == '\0') {
+    MEM_freeN(buf_str);
+    return OPERATOR_CANCELLED;
+  }
+  const char *buf_step = buf_str;
+  do {
+    const char *buf = buf_step;
+    buf_step = (char *)BLI_strchr_or_end(buf, '\n');
+    const int buf_len = buf_step - buf;
+    if (buf != buf_str) {
       WM_operator_name_call(C, "CONSOLE_OT_execute", WM_OP_EXEC_DEFAULT, NULL, NULL);
       ci = console_history_verify(C);
     }
-
-    console_select_offset(sc, console_line_insert(ci, buf_next));
-  }
+    console_line_insert(ci, buf, buf_len);
+    console_select_offset(sc, buf_len);
+  } while (*buf_step ? ((void)buf_step++, true) : false);
 
   MEM_freeN(buf_str);