1 files changed, 157 insertions, 0 deletions
diff --git a/src/ui/widget/color-entry.cpp b/src/ui/widget/color-entry.cpp
new file mode 100644
index 0000000..804350c
--- /dev/null
+++ b/src/ui/widget/color-entry.cpp
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Entry widget for typing color value in css form
+ *//*
+ * Authors:
+ *   Tomasz Boczkowski <penginsbacon@gmail.com>
+ *
+ * Copyright (C) 2014 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#include <glibmm.h>
+#include <glibmm/i18n.h>
+#include <iomanip>
+
+#include "color-entry.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+ColorEntry::ColorEntry(SelectedColor &color)
+    : _color(color)
+    , _updating(false)
+    , _updatingrgba(false)
+    , _prevpos(0)
+    , _lastcolor(0)
+{
+    _color_changed_connection = color.signal_changed.connect(sigc::mem_fun(this, &ColorEntry::_onColorChanged));
+    _color_dragged_connection = color.signal_dragged.connect(sigc::mem_fun(this, &ColorEntry::_onColorChanged));
+    signal_activate().connect(sigc::mem_fun(this, &ColorEntry::_onColorChanged));
+    get_buffer()->signal_inserted_text().connect(sigc::mem_fun(this, &ColorEntry::_inputCheck));
+    _onColorChanged();
+
+    // add extra character for pasting a hash, '#11223344'
+    set_max_length(9);
+    set_width_chars(8);
+    set_tooltip_text(_("Hexadecimal RGBA value of the color"));
+}
+
+ColorEntry::~ColorEntry()
+{
+    _color_changed_connection.disconnect();
+    _color_dragged_connection.disconnect();
+}
+
+void ColorEntry::_inputCheck(guint pos, const gchar * /*chars*/, guint n_chars)
+{
+    // remember position of last character, so we can remove it.
+    // we only overflow by 1 character at most.
+    _prevpos = pos + n_chars - 1;
+}
+
+void ColorEntry::on_changed()
+{
+    if (_updating) {
+        return;
+    }
+    if (_updatingrgba) {
+        return;  // Typing text into entry box
+    }
+
+    Glib::ustring text = get_text();
+    bool changed = false;
+
+    // Coerce the value format to hexadecimal
+    for (auto it = text.begin(); it != text.end(); /*++it*/) {
+        if (!g_ascii_isxdigit(*it)) {
+            text.erase(it);
+            changed = true;
+        } else {
+            ++it;
+        }
+    }
+
+    if (text.size() > 8) {
+        text.erase(_prevpos, 1);
+        changed = true;
+    }
+
+    // autofill rules
+    gchar *str = g_strdup(text.c_str());
+    gchar *end = nullptr;
+    guint64 rgba = g_ascii_strtoull(str, &end, 16);
+    ptrdiff_t len = end - str;
+    if (len < 8) {
+        if (len == 0) {
+            rgba = _lastcolor;
+        } else if (len <= 2) {
+            if (len == 1) {
+                rgba *= 17;
+            }
+            rgba = (rgba << 24) + (rgba << 16) + (rgba << 8);
+        } else if (len <= 4) {
+            // display as rrggbbaa
+            rgba = rgba << (4 * (4 - len));
+            guint64 r = rgba & 0xf000;
+            guint64 g = rgba & 0x0f00;
+            guint64 b = rgba & 0x00f0;
+            guint64 a = rgba & 0x000f;
+            rgba = 17 * ((r << 12) + (g << 8) + (b << 4) + a);
+        } else {
+            rgba = rgba << (4 * (8 - len));
+        }
+
+        if (len == 7) {
+            rgba = (rgba & 0xfffffff0) + (_lastcolor & 0x00f);
+        } else if (len == 5) {
+            rgba = (rgba & 0xfffff000) + (_lastcolor & 0xfff);
+        } else if (len != 4 && len != 8) {
+            rgba = (rgba & 0xffffff00) + (_lastcolor & 0x0ff);
+        }
+    }
+
+    _updatingrgba = true;
+    if (changed) {
+        set_text(str);
+    }
+    SPColor color(rgba);
+    _color.setColorAlpha(color, SP_RGBA32_A_F(rgba));
+    _updatingrgba = false;
+
+    g_free(str);
+}
+
+
+void ColorEntry::_onColorChanged()
+{
+    if (_updatingrgba) {
+        return;
+    }
+
+    SPColor color = _color.color();
+    gdouble alpha = _color.alpha();
+
+    _lastcolor = color.toRGBA32(alpha);
+    Glib::ustring text = Glib::ustring::format(std::hex, std::setw(8), std::setfill(L'0'), _lastcolor);
+
+    Glib::ustring old_text = get_text();
+    if (old_text != text) {
+        _updating = true;
+        set_text(text);
+        _updating = false;
+    }
+}
+}
+}
+}
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :