From df032580c170d9f5e508b34673b84a14f8808990 Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Fri, 13 Mar 2020 20:12:51 +1100
Subject: Fix info showing multi-line reports reversed (upside-down)

Also, only show the icon once per report.
---
 source/blender/editors/space_info/info_draw.c | 32 +++++++++++++++------------
 source/blender/editors/space_info/textview.h  |  8 +++----
 2 files changed, 22 insertions(+), 18 deletions(-)

(limited to 'source/blender/editors/space_info')

diff --git a/source/blender/editors/space_info/info_draw.c b/source/blender/editors/space_info/info_draw.c
index 0a5ca81484c..d704e10cce9 100644
--- a/source/blender/editors/space_info/info_draw.c
+++ b/source/blender/editors/space_info/info_draw.c
@@ -61,7 +61,10 @@ static enum eTextViewContext_LineFlag report_line_data(TextViewContext *tvc,
   int icon_fg_id;
   int icon_bg_id;
 
-  if (report->type & RPT_ERROR_ALL) {
+  if (tvc->iter_char_begin != 0) {
+    *r_icon = ICON_NONE;
+  }
+  else if (report->type & RPT_ERROR_ALL) {
     icon_fg_id = TH_INFO_ERROR_TEXT;
     icon_bg_id = TH_INFO_ERROR;
     *r_icon = ICON_CANCEL;
@@ -115,14 +118,13 @@ static void report_textview_init__internal(TextViewContext *tvc)
 {
   const Report *report = tvc->iter;
   const char *str = report->message;
-  const char *next_str = strchr(str + tvc->iter_char, '\n');
-
-  if (next_str) {
-    tvc->iter_char_next = (int)(next_str - str);
-  }
-  else {
-    tvc->iter_char_next = report->len;
+  for (int i = tvc->iter_char_end - 1; i >= 0; i -= 1) {
+    if (str[i] == '\n') {
+      tvc->iter_char_begin = i + 1;
+      return;
+    }
   }
+  tvc->iter_char_begin = 0;
 }
 
 static int report_textview_skip__internal(TextViewContext *tvc)
@@ -152,7 +154,8 @@ static int report_textview_begin(TextViewContext *tvc)
   tvc->iter_tmp = 0;
   if (tvc->iter && report_textview_skip__internal(tvc)) {
     /* init the newline iterator */
-    tvc->iter_char = 0;
+    const Report *report = tvc->iter;
+    tvc->iter_char_end = report->len;
     report_textview_init__internal(tvc);
 
     return true;
@@ -172,12 +175,13 @@ static int report_textview_step(TextViewContext *tvc)
   /* simple case, but no newline support */
   const Report *report = tvc->iter;
 
-  if (report->len <= tvc->iter_char_next) {
+  if (tvc->iter_char_begin <= 0) {
     tvc->iter = (void *)((Link *)tvc->iter)->prev;
     if (tvc->iter && report_textview_skip__internal(tvc)) {
       tvc->iter_tmp++;
 
-      tvc->iter_char = 0; /* reset start */
+      report = tvc->iter;
+      tvc->iter_char_end = report->len; /* reset start */
       report_textview_init__internal(tvc);
 
       return true;
@@ -188,7 +192,7 @@ static int report_textview_step(TextViewContext *tvc)
   }
   else {
     /* step to the next newline */
-    tvc->iter_char = tvc->iter_char_next + 1;
+    tvc->iter_char_end = tvc->iter_char_begin - 1;
     report_textview_init__internal(tvc);
 
     return true;
@@ -198,8 +202,8 @@ static int report_textview_step(TextViewContext *tvc)
 static void report_textview_line_get(TextViewContext *tvc, const char **r_line, int *r_len)
 {
   const Report *report = tvc->iter;
-  *r_line = report->message + tvc->iter_char;
-  *r_len = tvc->iter_char_next - tvc->iter_char;
+  *r_line = report->message + tvc->iter_char_begin;
+  *r_len = tvc->iter_char_end - tvc->iter_char_begin;
 }
 
 static void info_textview_draw_rect_calc(const ARegion *region,
diff --git a/source/blender/editors/space_info/textview.h b/source/blender/editors/space_info/textview.h
index 54b7c477791..8eef4ef5d56 100644
--- a/source/blender/editors/space_info/textview.h
+++ b/source/blender/editors/space_info/textview.h
@@ -65,10 +65,10 @@ typedef struct TextViewContext {
   void (*const_colors)(struct TextViewContext *tvc, unsigned char bg_sel[4]);
   const void *iter;
   int iter_index;
-  /** Char index, used for multi-line report display. */
-  int iter_char;
-  /** Same as 'iter_char', next new-line. */
-  int iter_char_next;
+  /** Used for internal multi-line iteration. */
+  int iter_char_begin;
+  /** The last character (not inclusive). */
+  int iter_char_end;
   /** Internal iterator use. */
   int iter_tmp;
 
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