• file
• revisions
• annotate
• diff
• comparison
• raw

widget/gtk/nsColorPicker.cpp@ac0c01689b40 (annotated)

widget/gtk/nsColorPicker.cpp

Thu, 15 Jan 2015 15:59:08 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:59:08 +0100

branch

TOR_BUG_9701

changeset 10

ac0c01689b40

permissions

-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#include <gtk/gtk.h>
michael@0	7
michael@0	8	#include "nsColor.h"
michael@0	9	#include "nsColorPicker.h"
michael@0	10	#include "nsGtkUtils.h"
michael@0	11	#include "nsIWidget.h"
michael@0	12	#include "WidgetUtils.h"
michael@0	13
michael@0	14	NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker)
michael@0	15
michael@0	16	int nsColorPicker::convertGdkColorComponent(guint16 color_component) {
michael@0	17	// GdkColor value is in range [0..65535]. We need something in range [0..255]
michael@0	18	return (color_component * 255 + 127) / 65535;
michael@0	19	}
michael@0	20
michael@0	21	guint16 nsColorPicker::convertToGdkColorComponent(int color_component) {
michael@0	22	return color_component * 65535 / 255;
michael@0	23	}
michael@0	24
michael@0	25	GdkColor nsColorPicker::convertToGdkColor(nscolor color) {
michael@0	26	GdkColor result = { 0 /* obsolete, unused 'pixel' value */,
michael@0	27	convertToGdkColorComponent(NS_GET_R(color)),
michael@0	28	convertToGdkColorComponent(NS_GET_G(color)),
michael@0	29	convertToGdkColorComponent(NS_GET_B(color)) };
michael@0	30
michael@0	31	return result;
michael@0	32	}
michael@0	33
michael@0	34	GtkColorSelection* nsColorPicker::WidgetGetColorSelection(GtkWidget* widget)
michael@0	35	{
michael@0	36	return GTK_COLOR_SELECTION(gtk_color_selection_dialog_get_color_selection(
michael@0	37	GTK_COLOR_SELECTION_DIALOG(widget)));
michael@0	38	}
michael@0	39
michael@0	40	/* void init (in nsIDOMWindow parent, in AString title, in short mode); */
michael@0	41	NS_IMETHODIMP nsColorPicker::Init(nsIDOMWindow *parent,
michael@0	42	const nsAString& title,
michael@0	43	const nsAString& initialColor)
michael@0	44	{
michael@0	45	mParentWidget = mozilla::widget::WidgetUtils::DOMWindowToWidget(parent);
michael@0	46	mTitle = title;
michael@0	47	mInitialColor = initialColor;
michael@0	48
michael@0	49	return NS_OK;
michael@0	50	}
michael@0	51
michael@0	52	/* void open (in nsIColorPickerShownCallback aColorPickerShownCallback); */
michael@0	53	NS_IMETHODIMP nsColorPicker::Open(nsIColorPickerShownCallback *aColorPickerShownCallback)
michael@0	54	{
michael@0	55
michael@0	56	// Input color string should be 7 length (i.e. a string representing a valid
michael@0	57	// simple color)
michael@0	58	if (mInitialColor.Length() != 7) {
michael@0	59	return NS_ERROR_FAILURE;
michael@0	60	}
michael@0	61
michael@0	62	const nsAString& withoutHash = StringTail(mInitialColor, 6);
michael@0	63	nscolor color;
michael@0	64	if (!NS_HexToRGB(withoutHash, &color)) {
michael@0	65	return NS_ERROR_FAILURE;
michael@0	66	}
michael@0	67
michael@0	68	GdkColor color_gdk = convertToGdkColor(color);
michael@0	69
michael@0	70	if (mCallback) {
michael@0	71	// It means Open has already been called: this is not allowed
michael@0	72	NS_WARNING("mCallback is already set. Open called twice?");
michael@0	73	return NS_ERROR_FAILURE;
michael@0	74	}
michael@0	75	mCallback = aColorPickerShownCallback;
michael@0	76
michael@0	77	nsXPIDLCString title;
michael@0	78	title.Adopt(ToNewUTF8String(mTitle));
michael@0	79	GtkWidget *color_chooser = gtk_color_selection_dialog_new(title);
michael@0	80
michael@0	81	GtkWindow *parent_window = GTK_WINDOW(mParentWidget->GetNativeData(NS_NATIVE_SHELLWIDGET));
michael@0	82	if (parent_window) {
michael@0	83	GtkWindow *window = GTK_WINDOW(color_chooser);
michael@0	84	gtk_window_set_transient_for(window, parent_window);
michael@0	85	gtk_window_set_destroy_with_parent(window, TRUE);
michael@0	86	}
michael@0	87
michael@0	88	gtk_color_selection_set_current_color(WidgetGetColorSelection(color_chooser),
michael@0	89	&color_gdk);
michael@0	90
michael@0	91	NS_ADDREF_THIS();
michael@0	92	g_signal_connect(WidgetGetColorSelection(color_chooser), "color-changed",
michael@0	93	G_CALLBACK(OnColorChanged), this);
michael@0	94	g_signal_connect(color_chooser, "response", G_CALLBACK(OnResponse), this);
michael@0	95	g_signal_connect(color_chooser, "destroy", G_CALLBACK(OnDestroy), this);
michael@0	96	gtk_widget_show(color_chooser);
michael@0	97
michael@0	98	return NS_OK;
michael@0	99	}
michael@0	100
michael@0	101	/* static */ void
michael@0	102	nsColorPicker::OnColorChanged(GtkColorSelection* colorselection,
michael@0	103	gpointer user_data)
michael@0	104	{
michael@0	105	static_cast<nsColorPicker*>(user_data)->Update(colorselection);
michael@0	106	}
michael@0	107
michael@0	108	/* static */ void
michael@0	109	nsColorPicker::OnResponse(GtkWidget* color_chooser, gint response_id,
michael@0	110	gpointer user_data)
michael@0	111	{
michael@0	112	static_cast<nsColorPicker*>(user_data)->
michael@0	113	Done(color_chooser, response_id);
michael@0	114	}
michael@0	115
michael@0	116	/* static */ void
michael@0	117	nsColorPicker::OnDestroy(GtkWidget* color_chooser, gpointer user_data)
michael@0	118	{
michael@0	119	static_cast<nsColorPicker*>(user_data)->
michael@0	120	Done(color_chooser, GTK_RESPONSE_CANCEL);
michael@0	121	}
michael@0	122
michael@0	123	void
michael@0	124	nsColorPicker::Update(GtkColorSelection* colorselection)
michael@0	125	{
michael@0	126	ReadValueFromColorSelection(colorselection);
michael@0	127	if (mCallback) {
michael@0	128	mCallback->Update(mColor);
michael@0	129	}
michael@0	130	}
michael@0	131
michael@0	132	void
michael@0	133	nsColorPicker::Done(GtkWidget* color_chooser, gint response)
michael@0	134	{
michael@0	135	switch (response) {
michael@0	136	case GTK_RESPONSE_OK:
michael@0	137	case GTK_RESPONSE_ACCEPT:
michael@0	138	ReadValueFromColorSelection(WidgetGetColorSelection(color_chooser));
michael@0	139	break;
michael@0	140	case GTK_RESPONSE_CANCEL:
michael@0	141	case GTK_RESPONSE_CLOSE:
michael@0	142	case GTK_RESPONSE_DELETE_EVENT:
michael@0	143	mColor = mInitialColor;
michael@0	144	break;
michael@0	145	default:
michael@0	146	NS_WARNING("Unexpected response");
michael@0	147	break;
michael@0	148	}
michael@0	149
michael@0	150	// A "response" signal won't be sent again but "destroy" will be.
michael@0	151	g_signal_handlers_disconnect_by_func(color_chooser,
michael@0	152	FuncToGpointer(OnDestroy), this);
michael@0	153
michael@0	154	gtk_widget_destroy(color_chooser);
michael@0	155	if (mCallback) {
michael@0	156	mCallback->Done(mColor);
michael@0	157	mCallback = nullptr;
michael@0	158	}
michael@0	159
michael@0	160	NS_RELEASE_THIS();
michael@0	161	}
michael@0	162
michael@0	163	nsString nsColorPicker::ToHexString(int n)
michael@0	164	{
michael@0	165	nsString result;
michael@0	166	if (n <= 0x0F) {
michael@0	167	result.Append('0');
michael@0	168	}
michael@0	169	result.AppendInt(n, 16);
michael@0	170	return result;
michael@0	171	}
michael@0	172
michael@0	173	void nsColorPicker::ReadValueFromColorSelection(GtkColorSelection* colorselection)
michael@0	174	{
michael@0	175	GdkColor rgba;
michael@0	176	gtk_color_selection_get_current_color(colorselection, &rgba);
michael@0	177
michael@0	178	mColor.AssignLiteral("#");
michael@0	179	mColor += ToHexString(convertGdkColorComponent(rgba.red));
michael@0	180	mColor += ToHexString(convertGdkColorComponent(rgba.green));
michael@0	181	mColor += ToHexString(convertGdkColorComponent(rgba.blue));
michael@0	182	}