1 files changed, 121 insertions, 0 deletions
diff --git a/src/extension/prefdialog/widget-label.cpp b/src/extension/prefdialog/widget-label.cpp
new file mode 100644
index 0000000..56ba0c1
--- /dev/null
+++ b/src/extension/prefdialog/widget-label.cpp
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Description widget for extensions
+ *//*
+ * Authors:
+ *   Ted Gould <ted@gould.cx>
+ *   Johan Engelen <johan@shouraizou.nl> *
+ *   Patrick Storz <eduard.braun2@gmx.de>
+ *
+ * Copyright (C) 2005-2019 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "widget-label.h"
+
+#include <gtkmm/box.h>
+#include <gtkmm/label.h>
+#include <glibmm/markup.h>
+#include <glibmm/regex.h>
+
+#include "xml/node.h"
+#include "extension/extension.h"
+
+namespace Inkscape {
+namespace Extension {
+
+
+WidgetLabel::WidgetLabel(Inkscape::XML::Node *xml, Inkscape::Extension::Extension *ext)
+    : InxWidget(xml, ext)
+{
+    // construct the text content by concatenating all (non-empty) text nodes,
+    // removing all other nodes (e.g. comment nodes) and replacing <extension:br> elements with "<br/>"
+    Inkscape::XML::Node * cur_child = xml->firstChild();
+    while (cur_child != nullptr) {
+        if (cur_child->type() == XML::NodeType::TEXT_NODE && cur_child->content() != nullptr) {
+            _value += cur_child->content();
+        } else if (cur_child->type() == XML::NodeType::ELEMENT_NODE && !g_strcmp0(cur_child->name(), "extension:br")) {
+            _value += "<br/>";
+        }
+        cur_child = cur_child->next();
+    }
+
+    // do replacements in the source string to account for the attribute xml:space="preserve"
+    // (those should match replacements potentially performed by xgettext to allow for proper translation)
+    if (g_strcmp0(xml->attribute("xml:space"), "preserve") == 0) {
+        // xgettext copies the source string verbatim in this case, so no changes needed
+    } else {
+        // remove all whitespace from start/end of string and replace intermediate whitespace with a single space
+        _value = Glib::Regex::create("^\\s+|\\s+$")->replace_literal(_value, 0, "", (Glib::RegexMatchFlags)0);
+        _value = Glib::Regex::create("\\s+")->replace_literal(_value, 0, " ", (Glib::RegexMatchFlags)0);
+    }
+
+    // translate value
+    if (!_value.empty()) {
+        if (_translatable != NO) { // translate unless explicitly marked untranslatable
+            _value = get_translation(_value.c_str());
+        }
+    }
+
+    // finally replace all remaining <br/> with a real newline character
+    _value = Glib::Regex::create("<br/>")->replace_literal(_value, 0, "\n", (Glib::RegexMatchFlags)0);
+
+    // parse appearance
+    if (_appearance) {
+        if (!strcmp(_appearance, "header")) {
+            _mode = HEADER;
+        } else if (!strcmp(_appearance, "url")) {
+            _mode = URL;
+        } else {
+            g_warning("Invalid value ('%s') for appearance of label widget in extension '%s'",
+                      _appearance, _extension->get_id());
+        }
+    }
+}
+
+/** \brief  Create a label for the description */
+Gtk::Widget *WidgetLabel::get_widget(sigc::signal<void> * /*changeSignal*/)
+{
+    if (_hidden) {
+        return nullptr;
+    }
+
+    Glib::ustring newtext = _value;
+
+    Gtk::Label *label = Gtk::manage(new Gtk::Label());
+    if (_mode == HEADER) {
+        label->set_markup(Glib::ustring("<b>") + Glib::Markup::escape_text(newtext) + Glib::ustring("</b>"));
+        label->set_margin_top(5);
+        label->set_margin_bottom(5);
+    } else if (_mode == URL) {
+        Glib::ustring escaped_url = Glib::Markup::escape_text(newtext);
+        label->set_markup(Glib::ustring::compose("<a href='%1'>%1</a>", escaped_url));
+    } else {
+        label->set_text(newtext);
+    }
+    label->set_line_wrap();
+    label->set_xalign(0);
+
+    // TODO: Ugly "fix" for gtk3 width/height calculation of labels.
+    //   - If not applying any limits long labels will make the window grow horizontally until it uses up
+    //     most of the available space (i.e. most of the screen area) which is ridiculously wide.
+    //   - By using "set_default_size(0,0)" in prefidalog.cpp we tell the window to shrink as much as possible,
+    //     however this can result in a much too narrow dialog instead and a lot of unnecessary wrapping.
+    //   - Here we set a lower limit of GUI_MAX_LINE_LENGTH characters per line that long texts will always use.
+    //     This means texts can not shrink anymore (they can still grow, though) and it's also necessary
+    //     to prevent https://bugzilla.gnome.org/show_bug.cgi?id=773572
+    int len = newtext.length();
+    label->set_width_chars(len > GUI_MAX_LINE_LENGTH ? GUI_MAX_LINE_LENGTH : len);
+
+    label->show();
+
+    Gtk::Box *hbox = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
+    hbox->pack_start(*label, true, true);
+    hbox->show();
+
+    return hbox;
+}
+
+}  /* namespace Extension */
+}  /* namespace Inkscape */