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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <gtk/gtk.h>
#include "nsColor.h"
#include "nsColorPicker.h"
#include "nsGtkUtils.h"
#include "nsIWidget.h"
#include "WidgetUtils.h"
#include "nsPIDOMWindow.h"
NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker)
#if defined(ACTIVATE_GTK3_COLOR_PICKER) && GTK_CHECK_VERSION(3,4,0)
int nsColorPicker::convertGdkRgbaComponent(gdouble color_component) {
// GdkRGBA value is in range [0.0..1.0]. We need something in range [0..255]
return color_component * 255 + 0.5;
}
gdouble nsColorPicker::convertToGdkRgbaComponent(int color_component) {
return color_component / 255.0;
}
GdkRGBA nsColorPicker::convertToRgbaColor(nscolor color) {
GdkRGBA result = { convertToGdkRgbaComponent(NS_GET_R(color)),
convertToGdkRgbaComponent(NS_GET_G(color)),
convertToGdkRgbaComponent(NS_GET_B(color)),
convertToGdkRgbaComponent(NS_GET_A(color)) };
return result;
}
#else
int nsColorPicker::convertGdkColorComponent(guint16 color_component) {
// GdkColor value is in range [0..65535]. We need something in range [0..255]
return (color_component * 255 + 127) / 65535;
}
guint16 nsColorPicker::convertToGdkColorComponent(int color_component) {
return color_component * 65535 / 255;
}
GdkColor nsColorPicker::convertToGdkColor(nscolor color) {
GdkColor result = { 0 /* obsolete, unused 'pixel' value */,
convertToGdkColorComponent(NS_GET_R(color)),
convertToGdkColorComponent(NS_GET_G(color)),
convertToGdkColorComponent(NS_GET_B(color)) };
return result;
}
GtkColorSelection* nsColorPicker::WidgetGetColorSelection(GtkWidget* widget)
{
return GTK_COLOR_SELECTION(gtk_color_selection_dialog_get_color_selection(
GTK_COLOR_SELECTION_DIALOG(widget)));
}
#endif
NS_IMETHODIMP nsColorPicker::Init(mozIDOMWindowProxy *aParent,
const nsAString& title,
const nsAString& initialColor)
{
auto* parent = nsPIDOMWindowOuter::From(aParent);
mParentWidget = mozilla::widget::WidgetUtils::DOMWindowToWidget(parent);
mTitle = title;
mInitialColor = initialColor;
return NS_OK;
}
NS_IMETHODIMP nsColorPicker::Open(nsIColorPickerShownCallback *aColorPickerShownCallback)
{
// Input color string should be 7 length (i.e. a string representing a valid
// simple color)
if (mInitialColor.Length() != 7) {
return NS_ERROR_FAILURE;
}
const nsAString& withoutHash = StringTail(mInitialColor, 6);
nscolor color;
if (!NS_HexToRGBA(withoutHash, nsHexColorType::NoAlpha, &color)) {
return NS_ERROR_FAILURE;
}
if (mCallback) {
// It means Open has already been called: this is not allowed
NS_WARNING("mCallback is already set. Open called twice?");
return NS_ERROR_FAILURE;
}
mCallback = aColorPickerShownCallback;
nsXPIDLCString title;
title.Adopt(ToNewUTF8String(mTitle));
GtkWindow *parent_window = GTK_WINDOW(mParentWidget->GetNativeData(NS_NATIVE_SHELLWIDGET));
#if defined(ACTIVATE_GTK3_COLOR_PICKER) && GTK_CHECK_VERSION(3,4,0)
GtkWidget* color_chooser = gtk_color_chooser_dialog_new(title, parent_window);
if (parent_window) {
GtkWindow *window = GTK_WINDOW(color_chooser);
gtk_window_set_destroy_with_parent(window, TRUE);
if (gtk_window_get_modal(parent_window)) {
gtk_window_set_modal(window, TRUE);
}
}
gtk_color_chooser_set_use_alpha(GTK_COLOR_CHOOSER(color_chooser), FALSE);
GdkRGBA color_rgba = convertToRgbaColor(color);
gtk_color_chooser_set_rgba(GTK_COLOR_CHOOSER(color_chooser),
&color_rgba);
g_signal_connect(GTK_COLOR_CHOOSER(color_chooser), "color-activated",
G_CALLBACK(OnColorChanged), this);
#else
GtkWidget *color_chooser = gtk_color_selection_dialog_new(title);
if (parent_window) {
GtkWindow *window = GTK_WINDOW(color_chooser);
gtk_window_set_transient_for(window, parent_window);
gtk_window_set_destroy_with_parent(window, TRUE);
if (gtk_window_get_modal(parent_window)) {
gtk_window_set_modal(window, TRUE);
}
}
GdkColor color_gdk = convertToGdkColor(color);
gtk_color_selection_set_current_color(WidgetGetColorSelection(color_chooser),
&color_gdk);
g_signal_connect(WidgetGetColorSelection(color_chooser), "color-changed",
G_CALLBACK(OnColorChanged), this);
#endif
NS_ADDREF_THIS();
g_signal_connect(color_chooser, "response", G_CALLBACK(OnResponse), this);
g_signal_connect(color_chooser, "destroy", G_CALLBACK(OnDestroy), this);
gtk_widget_show(color_chooser);
return NS_OK;
}
#if defined(ACTIVATE_GTK3_COLOR_PICKER) && GTK_CHECK_VERSION(3,4,0)
/* static */ void
nsColorPicker::OnColorChanged(GtkColorChooser* color_chooser, GdkRGBA* color,
gpointer user_data)
{
static_cast<nsColorPicker*>(user_data)->Update(color);
}
void
nsColorPicker::Update(GdkRGBA* color)
{
SetColor(color);
if (mCallback) {
mCallback->Update(mColor);
}
}
void nsColorPicker::SetColor(const GdkRGBA* color)
{
mColor.Assign('#');
mColor += ToHexString(convertGdkRgbaComponent(color->red));
mColor += ToHexString(convertGdkRgbaComponent(color->green));
mColor += ToHexString(convertGdkRgbaComponent(color->blue));
}
#else
/* static */ void
nsColorPicker::OnColorChanged(GtkColorSelection* colorselection,
gpointer user_data)
{
static_cast<nsColorPicker*>(user_data)->Update(colorselection);
}
void
nsColorPicker::Update(GtkColorSelection* colorselection)
{
ReadValueFromColorSelection(colorselection);
if (mCallback) {
mCallback->Update(mColor);
}
}
void nsColorPicker::ReadValueFromColorSelection(GtkColorSelection* colorselection)
{
GdkColor rgba;
gtk_color_selection_get_current_color(colorselection, &rgba);
mColor.Assign('#');
mColor += ToHexString(convertGdkColorComponent(rgba.red));
mColor += ToHexString(convertGdkColorComponent(rgba.green));
mColor += ToHexString(convertGdkColorComponent(rgba.blue));
}
#endif
/* static */ void
nsColorPicker::OnResponse(GtkWidget* color_chooser, gint response_id,
gpointer user_data)
{
static_cast<nsColorPicker*>(user_data)->
Done(color_chooser, response_id);
}
/* static */ void
nsColorPicker::OnDestroy(GtkWidget* color_chooser, gpointer user_data)
{
static_cast<nsColorPicker*>(user_data)->
Done(color_chooser, GTK_RESPONSE_CANCEL);
}
void
nsColorPicker::Done(GtkWidget* color_chooser, gint response)
{
switch (response) {
case GTK_RESPONSE_OK:
case GTK_RESPONSE_ACCEPT:
#if defined(ACTIVATE_GTK3_COLOR_PICKER) && GTK_CHECK_VERSION(3,4,0)
GdkRGBA color;
gtk_color_chooser_get_rgba(GTK_COLOR_CHOOSER(color_chooser), &color);
SetColor(&color);
#else
ReadValueFromColorSelection(WidgetGetColorSelection(color_chooser));
#endif
break;
case GTK_RESPONSE_CANCEL:
case GTK_RESPONSE_CLOSE:
case GTK_RESPONSE_DELETE_EVENT:
mColor = mInitialColor;
break;
default:
NS_WARNING("Unexpected response");
break;
}
// A "response" signal won't be sent again but "destroy" will be.
g_signal_handlers_disconnect_by_func(color_chooser,
FuncToGpointer(OnDestroy), this);
gtk_widget_destroy(color_chooser);
if (mCallback) {
mCallback->Done(mColor);
mCallback = nullptr;
}
NS_RELEASE_THIS();
}
nsString nsColorPicker::ToHexString(int n)
{
nsString result;
if (n <= 0x0F) {
result.Append('0');
}
result.AppendInt(n, 16);
return result;
}
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