midori/katze/gtk3-compat.c

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/*
Copyright (C) 2011-2012 Christian Dywan <christian@twotoasts.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
See the file COPYING for the full license text.
*/
#include "katze/gtk3-compat.h"
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#if !GTK_CHECK_VERSION (3, 2, 0)
static void
sokoke_widget_set_pango_font_style (GtkWidget* widget,
PangoStyle style)
{
/* Conveniently change the pango font style
For some reason we need to reset if we actually want the normal style */
if (style == PANGO_STYLE_NORMAL)
gtk_widget_modify_font (widget, NULL);
else
{
PangoFontDescription* font_description = pango_font_description_new ();
pango_font_description_set_style (font_description, PANGO_STYLE_ITALIC);
gtk_widget_modify_font (widget, font_description);
pango_font_description_free (font_description);
}
}
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/* returns TRUE if the entry is currently showing its placeholder text */
static gboolean
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sokoke_entry_is_showing_default (GtkEntry* entry)
{
gint showing_default = GPOINTER_TO_INT (
g_object_get_data (G_OBJECT (entry), "sokoke_showing_default"));
const gchar* text = gtk_entry_get_text (entry);
const gchar* default_text = (const gchar*)g_object_get_data (
G_OBJECT (entry), "sokoke_default_text");
return showing_default && !g_strcmp0(text, default_text);
}
/* returns TRUE if the entry is not being used by the user to perform entry or
hold data at a given moment */
static gboolean
sokoke_entry_is_idle (GtkEntry* entry)
{
const gchar* text = gtk_entry_get_text (entry);
/* if the default is visible or the user has left the entry blank */
return sokoke_entry_is_showing_default(entry) ||
(text && !*text && !gtk_widget_has_focus (GTK_WIDGET (entry)));
}
static gboolean
sokoke_on_entry_text_changed (GtkEntry* entry,
GParamSpec* pspec,
gpointer userdata);
static void
sokoke_hide_placeholder_text (GtkEntry* entry)
{
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if(sokoke_entry_is_showing_default (entry))
{
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g_signal_handlers_block_by_func (entry, sokoke_on_entry_text_changed, NULL);
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gtk_entry_set_text (entry, "");
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g_signal_handlers_unblock_by_func (entry, sokoke_on_entry_text_changed, NULL);
}
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g_object_set_data (G_OBJECT (entry), "sokoke_showing_default",
GINT_TO_POINTER (0));
sokoke_widget_set_pango_font_style (GTK_WIDGET (entry),
PANGO_STYLE_NORMAL);
}
static gboolean
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sokoke_on_entry_focus_in_event (GtkEntry* entry,
GdkEventFocus* event,
gpointer userdata)
{
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sokoke_hide_placeholder_text (entry);
return FALSE;
}
static void
sokoke_show_placeholder_text (GtkEntry* entry)
{
/* no need to do work if the widget is unfocused with placeholder */
if(sokoke_entry_is_showing_default (entry))
return;
/* no need to do work if the placeholder is already visible */
const gchar* text = gtk_entry_get_text (entry);
if (text && !*text)
{
const gchar* default_text = (const gchar*)g_object_get_data (
G_OBJECT (entry), "sokoke_default_text");
g_object_set_data (G_OBJECT (entry),
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"sokoke_showing_default", GINT_TO_POINTER (1));
g_signal_handlers_block_by_func (entry, sokoke_on_entry_text_changed, NULL);
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gtk_entry_set_text (entry, default_text);
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g_signal_handlers_unblock_by_func (entry, sokoke_on_entry_text_changed, NULL);
sokoke_widget_set_pango_font_style (GTK_WIDGET (entry),
PANGO_STYLE_ITALIC);
}
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}
static void
sokoke_on_entry_drag_leave (GtkEntry* entry,
GdkDragContext* drag_context,
guint timestamp,
gpointer user_data)
{
sokoke_show_placeholder_text (entry);
}
static gboolean
sokoke_on_entry_text_changed (GtkEntry* entry,
GParamSpec* pspec,
gpointer userdata)
{
if(sokoke_entry_is_idle (entry))
{
sokoke_show_placeholder_text (entry);
}
else
{
sokoke_hide_placeholder_text (entry);
}
return TRUE;
}
static gboolean
sokoke_on_entry_focus_out_event (GtkEntry* entry,
GdkEventFocus* event,
gpointer userdata)
{
sokoke_show_placeholder_text (entry);
return FALSE;
}
static gboolean
sokoke_on_entry_drag_motion (GtkEntry* entry,
GdkDragContext* drag_context,
gint x,
gint y,
guint timestamp,
gpointer user_data)
{
sokoke_hide_placeholder_text (entry);
return FALSE;
}
static gboolean
sokoke_on_entry_drag_drop (GtkEntry* entry,
GdkDragContext* drag_context,
gint x,
gint y,
guint timestamp,
gpointer user_data)
{
sokoke_hide_placeholder_text (entry);
return FALSE;
}
static void
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sokoke_on_entry_popup (GtkEntry *entry,
GtkWidget *popup,
gpointer user_data)
{
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/* If the user selects paste in the popup, we should hide the default
when the menu closes so it pastes into a clean entry */
g_signal_connect_swapped (popup, "destroy", G_CALLBACK (
sokoke_hide_placeholder_text), entry);
}
void
gtk_entry_set_placeholder_text (GtkEntry* entry,
const gchar* default_text)
{
/* Note: The default text initially overwrites any previous text */
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gchar* old_default_text = g_object_get_data (G_OBJECT (entry), "sokoke_default_text");
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g_object_set_data (G_OBJECT (entry), "sokoke_default_text", (gpointer)default_text);
if (default_text == NULL)
{
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g_object_set_data (G_OBJECT (entry), "sokoke_showing_default", GINT_TO_POINTER (0));
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_drag_motion), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_focus_in_event), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_drag_leave), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_drag_drop), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_focus_out_event), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_text_changed), NULL);
g_signal_handlers_disconnect_by_func (entry,
G_CALLBACK (sokoke_on_entry_popup), NULL);
}
else if (old_default_text == NULL)
{
g_object_set_data (G_OBJECT (entry), "sokoke_showing_default", GINT_TO_POINTER (1));
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry), PANGO_STYLE_ITALIC);
gtk_entry_set_text (entry, default_text);
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g_signal_connect (entry, "drag-motion",
G_CALLBACK (sokoke_on_entry_drag_motion), NULL);
g_signal_connect (entry, "focus-in-event",
G_CALLBACK (sokoke_on_entry_focus_in_event), NULL);
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g_signal_connect (entry, "drag-leave",
G_CALLBACK (sokoke_on_entry_drag_leave), NULL);
g_signal_connect (entry, "drag-drop",
G_CALLBACK (sokoke_on_entry_drag_drop), NULL);
g_signal_connect (entry, "focus-out-event",
G_CALLBACK (sokoke_on_entry_focus_out_event), NULL);
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g_signal_connect (entry, "notify::text",
G_CALLBACK (sokoke_on_entry_text_changed), NULL);
g_signal_connect (entry, "populate-popup",
G_CALLBACK (sokoke_on_entry_popup), NULL);
}
else if (!gtk_widget_has_focus (GTK_WIDGET (entry)))
{
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gint showing_default = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (entry), "sokoke_showing_default"));
if (showing_default)
{
gtk_entry_set_text (entry, default_text);
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry), PANGO_STYLE_ITALIC);
}
}
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}
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const gchar*
gtk_entry_get_placeholder_text (GtkEntry* entry)
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{
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return g_object_get_data (G_OBJECT (entry), "sokoke_default_text");
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}
#endif