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fix: make the error dialog caret point at the character it's blaming (#14886)

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* fix: make the error dialog caret point at the character it's blaming

Custom G-code parse errors print the offending line with a '^' under the
character that broke, positioned with spaces so it only lines up in a
fixed-width font. Since v2.3.2 these dialogs rendered entirely in the
proportional UI font, so the caret drifted left of its column and landed
on unrelated text.

Render only the code excerpts (the offending source line and its caret) in
the fixed-width face, leaving the surrounding prose in the UI font, and
reserve the horizontal scrollbar's height so a long line does not clip.
Rename the flag to has_code_excerpts to match what it now means.

Fixes #14869

* refactor(GUI): use <code> instead of <tt> for error excerpts

wxHTML maps <tt>, <code>, <kbd> and <samp> to the same fixed-width
handler, so this renders identically. <code> is the non-deprecated
tag and matches what the original code used.

* fix(GUI): align the error caret with real spaces, not &nbsp;

The caret line was padded with &nbsp; so its spaces would survive inline
HTML. wxHTML measures every glyph by its font extent, so where the fixed
font lacks a U+00A0 glyph the fallback renders it about twice as wide, and
the all-&nbsp; caret line outran the source, drifting the ^ to the right.

Wrap the excerpts in a small <excerpt> tag, registered on the dialog's own
parser, that switches on wxHTML literal-whitespace mode so the caret uses
real spaces that match the source column in any font. It sits inside <code>
for the fixed face; <pre> would do both but forces a blank line above it.

---------

Co-authored-by: Noisyfox <timemanager.rick@gmail.com>
This commit is contained in:
Kris Austin
2026-08-04 22:01:45 +08:00
committed by GitHub
co-authored by Noisyfox
parent 59155f26ac
commit 82759d3899
5 changed files with 120 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/slic3r/GUI/MsgDialog.cpp
+106 -18
View File
@@ -9,8 +9,13 @@
#include <wx/clipbrd.h>
#include <wx/checkbox.h>
#include <wx/html/htmlwin.h>
#include <wx/html/winpars.h>
#include <algorithm>
#include <boost/algorithm/string/replace.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include "libslic3r/libslic3r.h"
#include "libslic3r/Utils.hpp"
@@ -229,12 +234,82 @@ void MsgDialog::finalize()
}
// A placeholder-parser caret line, pointing at the column where parsing failed.
static bool is_caret_line(const std::string &line)
{
return std::count(line.begin(), line.end(), '^') == 1 &&
std::all_of(line.begin(), line.end(), [](char c) { return c == ' ' || c == '^'; });
}
// Tag each line as a code excerpt (a caret line or the source line above one) that must stay
// monospaced for the '^' to align.
static std::vector<std::pair<std::string, bool>> classify_code_lines(const std::string &msg)
{
std::vector<std::string> lines;
boost::split(lines, msg, boost::is_any_of("\n"));
for (std::string &line : lines)
if (!line.empty() && line.back() == '\r')
line.pop_back();
std::vector<std::pair<std::string, bool>> tagged;
tagged.reserve(lines.size());
for (size_t i = 0; i < lines.size(); ++i) {
bool is_code = is_caret_line(lines[i]) || (i + 1 < lines.size() && is_caret_line(lines[i + 1]));
tagged.emplace_back(std::move(lines[i]), is_code);
}
return tagged;
}
// Keeps whitespace literal so the caret's leading spaces survive.
// Used inside <code>, which supplies the fixed face. <pre> does both but adds a blank line above it.
class CodeExcerptTagHandler : public wxHtmlWinTagHandler
{
public:
wxString GetSupportedTags() override { return wxT("EXCERPT"); }
bool HandleTag(const wxHtmlTag &tag) override
{
const wxHtmlWinParser::WhitespaceMode ws = m_WParser->GetWhitespaceMode();
m_WParser->SetWhitespaceMode(wxHtmlWinParser::Whitespace_Pre);
ParseInner(tag);
m_WParser->SetWhitespaceMode(ws);
return true;
}
};
// Render the message as HTML, monospacing only the code excerpts.
static std::string format_parser_error_html(const std::string &msg)
{
std::string out;
for (const auto &[text, is_code] : classify_code_lines(msg)) {
if (!out.empty()) out += "<br>"; // join, not trail; a trailing <br> forces a scrollbar
std::string escaped = xml_escape(text);
if (is_code)
out += "<code><excerpt>" + escaped + "</excerpt></code>";
else
out += escaped;
}
return out;
}
// Measure each line in the font it will render in, so the dialog fits the longest line without slack.
static wxSize measure_mixed_text(wxWindow *parent, const std::string &msg, const wxFont &prose_font, const wxFont &code_font)
{
wxClientDC dc(parent);
int width = 0, height = 0;
for (const auto &[text, is_code] : classify_code_lines(msg)) {
dc.SetFont(is_code ? code_font : prose_font);
width = std::max(width, dc.GetTextExtent(wxString::FromUTF8(text.c_str())).GetWidth());
height += dc.GetCharHeight();
}
return wxSize(width, height);
}
// Text shown as HTML, so that mouse selection and Ctrl-V to copy will work.
static void add_msg_content(wxWindow *parent,
wxBoxSizer *content_sizer,
wxString msg,
bool monospaced_font = false,
bool is_marked_msg = false,
bool has_code_excerpts = false,
bool is_marked_msg = false,
const wxString &link_text = "",
std::function<void(const wxString &)> link_callback = nullptr)
{
@@ -243,7 +318,7 @@ static void add_msg_content(wxWindow *parent,
// count lines in the message
int msg_lines = 0;
if (!monospaced_font) {
if (!has_code_excerpts) {
int line_len = 55;// count of symbols in one line
int start_line = 0;
for (auto i = msg.begin(); i != msg.end(); ++i) {
@@ -300,13 +375,23 @@ static void add_msg_content(wxWindow *parent,
page_size = wxSize(info_width, page_height);
}
else {
wxClientDC dc(parent);
dc.SetFont(font); // ORCA without this it calculates bigger size
wxSize msg_sz = dc.GetMultiLineTextExtent(msg) + parent->FromDIP(wxSize(10,5)); // added extra spacing to prevent wrapping
wxSize msg_sz;
if (has_code_excerpts) {
msg_sz = measure_mixed_text(parent, msg.ToUTF8().data(), font, monospace);
} else {
wxClientDC dc(parent);
dc.SetFont(font); // ORCA without this it calculates bigger size
msg_sz = dc.GetMultiLineTextExtent(msg);
}
msg_sz += parent->FromDIP(wxSize(10,5)); // added extra spacing to prevent wrapping
page_size = wxSize(std::min(msg_sz.GetX(), info_width), std::min(msg_sz.GetY(), info_width));
int page_height = msg_sz.GetY();
// Reserve the horizontal scrollbar's height, or it clips the last line.
if (msg_sz.GetX() > info_width)
page_height += wxSystemSettings::GetMetric(wxSYS_HSCROLL_Y, parent);
page_size = wxSize(std::min(msg_sz.GetX(), info_width), std::min(page_height, info_width));
// Extra line breaks in message dialog
if (link_text.IsEmpty() && !link_callback && is_marked_msg == false) {//for common text
if (link_text.IsEmpty() && !link_callback && is_marked_msg == false && !has_code_excerpts) {//for common text
html->Destroy();
if (msg_sz.GetX() < info_width) {//No need for line breaks
info_width = msg_sz.GetX();
@@ -337,12 +422,15 @@ static void add_msg_content(wxWindow *parent,
}
html->SetMinSize(page_size);
std::string msg_escaped = xml_escape(msg.ToUTF8().data(), is_marked_msg);
boost::replace_all(msg_escaped, "\r\n", "<br>");
boost::replace_all(msg_escaped, "\n", "<br>");
if (monospaced_font)
// Code formatting will be preserved. This is useful for reporting errors from the placeholder parser.
msg_escaped = std::string("<pre><code>") + msg_escaped + "</code></pre>";
std::string msg_escaped;
if (has_code_excerpts) {
html->GetParser()->AddTagHandler(new CodeExcerptTagHandler());
msg_escaped = format_parser_error_html(msg.ToUTF8().data());
} else {
msg_escaped = xml_escape(msg.ToUTF8().data(), is_marked_msg);
boost::replace_all(msg_escaped, "\r\n", "<br>");
boost::replace_all(msg_escaped, "\n", "<br>");
}
if (!link_text.IsEmpty() && link_callback) {
msg_escaped += "<span><a href=\"#\" style=\"color:rgb(0, 150, 136); text-decoration:underline;\">" + std::string(link_text.ToUTF8().data()) + "</a></span>";
@@ -360,15 +448,15 @@ static void add_msg_content(wxWindow *parent,
// ErrorDialog
ErrorDialog::ErrorDialog(wxWindow *parent, const wxString &temp_msg, bool monospaced_font)
ErrorDialog::ErrorDialog(wxWindow *parent, const wxString &temp_msg, bool has_code_excerpts)
: MsgDialog(parent, wxString::Format(_(L("%s error")), SLIC3R_APP_FULL_NAME),
wxString::Format(_(L("%s has encountered an error")), SLIC3R_APP_FULL_NAME), wxOK)
, msg(temp_msg)
{
add_msg_content(this, content_sizer, msg, monospaced_font);
add_msg_content(this, content_sizer, msg, has_code_excerpts);
// Use a small bitmap with monospaced font, as the error text will not be wrapped.
logo->SetBitmap(create_scaled_bitmap("OrcaSlicer_192px_grayscale.png", this, monospaced_font ? 48 : /*1*/64));
// Use a small bitmap for code excerpts, which cannot wrap and so need the width.
logo->SetBitmap(create_scaled_bitmap("OrcaSlicer_192px_grayscale.png", this, has_code_excerpts ? 48 : /*1*/64));
SetMaxSize(MSG_DLG_MAX_SIZE);