1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gtk/nsColorPicker.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,182 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include <gtk/gtk.h>
1.10 +
1.11 +#include "nsColor.h"
1.12 +#include "nsColorPicker.h"
1.13 +#include "nsGtkUtils.h"
1.14 +#include "nsIWidget.h"
1.15 +#include "WidgetUtils.h"
1.16 +
1.17 +NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker)
1.18 +
1.19 +int nsColorPicker::convertGdkColorComponent(guint16 color_component) {
1.20 + // GdkColor value is in range [0..65535]. We need something in range [0..255]
1.21 + return (color_component * 255 + 127) / 65535;
1.22 +}
1.23 +
1.24 +guint16 nsColorPicker::convertToGdkColorComponent(int color_component) {
1.25 + return color_component * 65535 / 255;
1.26 +}
1.27 +
1.28 +GdkColor nsColorPicker::convertToGdkColor(nscolor color) {
1.29 + GdkColor result = { 0 /* obsolete, unused 'pixel' value */,
1.30 + convertToGdkColorComponent(NS_GET_R(color)),
1.31 + convertToGdkColorComponent(NS_GET_G(color)),
1.32 + convertToGdkColorComponent(NS_GET_B(color)) };
1.33 +
1.34 + return result;
1.35 +}
1.36 +
1.37 +GtkColorSelection* nsColorPicker::WidgetGetColorSelection(GtkWidget* widget)
1.38 +{
1.39 + return GTK_COLOR_SELECTION(gtk_color_selection_dialog_get_color_selection(
1.40 + GTK_COLOR_SELECTION_DIALOG(widget)));
1.41 +}
1.42 +
1.43 +/* void init (in nsIDOMWindow parent, in AString title, in short mode); */
1.44 +NS_IMETHODIMP nsColorPicker::Init(nsIDOMWindow *parent,
1.45 + const nsAString& title,
1.46 + const nsAString& initialColor)
1.47 +{
1.48 + mParentWidget = mozilla::widget::WidgetUtils::DOMWindowToWidget(parent);
1.49 + mTitle = title;
1.50 + mInitialColor = initialColor;
1.51 +
1.52 + return NS_OK;
1.53 +}
1.54 +
1.55 +/* void open (in nsIColorPickerShownCallback aColorPickerShownCallback); */
1.56 +NS_IMETHODIMP nsColorPicker::Open(nsIColorPickerShownCallback *aColorPickerShownCallback)
1.57 +{
1.58 +
1.59 + // Input color string should be 7 length (i.e. a string representing a valid
1.60 + // simple color)
1.61 + if (mInitialColor.Length() != 7) {
1.62 + return NS_ERROR_FAILURE;
1.63 + }
1.64 +
1.65 + const nsAString& withoutHash = StringTail(mInitialColor, 6);
1.66 + nscolor color;
1.67 + if (!NS_HexToRGB(withoutHash, &color)) {
1.68 + return NS_ERROR_FAILURE;
1.69 + }
1.70 +
1.71 + GdkColor color_gdk = convertToGdkColor(color);
1.72 +
1.73 + if (mCallback) {
1.74 + // It means Open has already been called: this is not allowed
1.75 + NS_WARNING("mCallback is already set. Open called twice?");
1.76 + return NS_ERROR_FAILURE;
1.77 + }
1.78 + mCallback = aColorPickerShownCallback;
1.79 +
1.80 + nsXPIDLCString title;
1.81 + title.Adopt(ToNewUTF8String(mTitle));
1.82 + GtkWidget *color_chooser = gtk_color_selection_dialog_new(title);
1.83 +
1.84 + GtkWindow *parent_window = GTK_WINDOW(mParentWidget->GetNativeData(NS_NATIVE_SHELLWIDGET));
1.85 + if (parent_window) {
1.86 + GtkWindow *window = GTK_WINDOW(color_chooser);
1.87 + gtk_window_set_transient_for(window, parent_window);
1.88 + gtk_window_set_destroy_with_parent(window, TRUE);
1.89 + }
1.90 +
1.91 + gtk_color_selection_set_current_color(WidgetGetColorSelection(color_chooser),
1.92 + &color_gdk);
1.93 +
1.94 + NS_ADDREF_THIS();
1.95 + g_signal_connect(WidgetGetColorSelection(color_chooser), "color-changed",
1.96 + G_CALLBACK(OnColorChanged), this);
1.97 + g_signal_connect(color_chooser, "response", G_CALLBACK(OnResponse), this);
1.98 + g_signal_connect(color_chooser, "destroy", G_CALLBACK(OnDestroy), this);
1.99 + gtk_widget_show(color_chooser);
1.100 +
1.101 + return NS_OK;
1.102 +}
1.103 +
1.104 +/* static */ void
1.105 +nsColorPicker::OnColorChanged(GtkColorSelection* colorselection,
1.106 + gpointer user_data)
1.107 +{
1.108 + static_cast<nsColorPicker*>(user_data)->Update(colorselection);
1.109 +}
1.110 +
1.111 +/* static */ void
1.112 +nsColorPicker::OnResponse(GtkWidget* color_chooser, gint response_id,
1.113 + gpointer user_data)
1.114 +{
1.115 + static_cast<nsColorPicker*>(user_data)->
1.116 + Done(color_chooser, response_id);
1.117 +}
1.118 +
1.119 +/* static */ void
1.120 +nsColorPicker::OnDestroy(GtkWidget* color_chooser, gpointer user_data)
1.121 +{
1.122 + static_cast<nsColorPicker*>(user_data)->
1.123 + Done(color_chooser, GTK_RESPONSE_CANCEL);
1.124 +}
1.125 +
1.126 +void
1.127 +nsColorPicker::Update(GtkColorSelection* colorselection)
1.128 +{
1.129 + ReadValueFromColorSelection(colorselection);
1.130 + if (mCallback) {
1.131 + mCallback->Update(mColor);
1.132 + }
1.133 +}
1.134 +
1.135 +void
1.136 +nsColorPicker::Done(GtkWidget* color_chooser, gint response)
1.137 +{
1.138 + switch (response) {
1.139 + case GTK_RESPONSE_OK:
1.140 + case GTK_RESPONSE_ACCEPT:
1.141 + ReadValueFromColorSelection(WidgetGetColorSelection(color_chooser));
1.142 + break;
1.143 + case GTK_RESPONSE_CANCEL:
1.144 + case GTK_RESPONSE_CLOSE:
1.145 + case GTK_RESPONSE_DELETE_EVENT:
1.146 + mColor = mInitialColor;
1.147 + break;
1.148 + default:
1.149 + NS_WARNING("Unexpected response");
1.150 + break;
1.151 + }
1.152 +
1.153 + // A "response" signal won't be sent again but "destroy" will be.
1.154 + g_signal_handlers_disconnect_by_func(color_chooser,
1.155 + FuncToGpointer(OnDestroy), this);
1.156 +
1.157 + gtk_widget_destroy(color_chooser);
1.158 + if (mCallback) {
1.159 + mCallback->Done(mColor);
1.160 + mCallback = nullptr;
1.161 + }
1.162 +
1.163 + NS_RELEASE_THIS();
1.164 +}
1.165 +
1.166 +nsString nsColorPicker::ToHexString(int n)
1.167 +{
1.168 + nsString result;
1.169 + if (n <= 0x0F) {
1.170 + result.Append('0');
1.171 + }
1.172 + result.AppendInt(n, 16);
1.173 + return result;
1.174 +}
1.175 +
1.176 +void nsColorPicker::ReadValueFromColorSelection(GtkColorSelection* colorselection)
1.177 +{
1.178 + GdkColor rgba;
1.179 + gtk_color_selection_get_current_color(colorselection, &rgba);
1.180 +
1.181 + mColor.AssignLiteral("#");
1.182 + mColor += ToHexString(convertGdkColorComponent(rgba.red));
1.183 + mColor += ToHexString(convertGdkColorComponent(rgba.green));
1.184 + mColor += ToHexString(convertGdkColorComponent(rgba.blue));
1.185 +}
