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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; coding: utf-8 -*-
 *
 * This file is part of CtkSourceView
 *
 * Copyright (C) 2010 - Jesse van den Kieboom
 *
 * CtkSourceView 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.
 *
 * CtkSourceView is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "ctksourcegutterrenderer.h"
#include "ctksourcegutterrenderer-private.h"
#include "ctksourcestylescheme.h"
#include "ctksourceview.h"
#include "ctksource-enumtypes.h"
#include "ctksource-marshal.h"

/**
 * SECTION:gutterrenderer
 * @Short_description: Gutter cell renderer
 * @Title: CtkSourceGutterRenderer
 * @See_also: #CtkSourceGutter
 *
 * A #CtkSourceGutterRenderer represents a column in a #CtkSourceGutter. The
 * column contains one cell for each visible line of the #CtkTextBuffer. Due to
 * text wrapping, a cell can thus span multiple lines of the #CtkTextView. In
 * this case, #CtkSourceGutterRendererAlignmentMode controls the alignment of
 * the cell.
 *
 * The gutter renderer must announce its #CtkSourceGutterRenderer:size. The
 * height is determined by the text view height. The width must be determined by
 * the gutter renderer. The width generally takes into account the entire text
 * buffer. For instance, to display the line numbers, if the buffer contains 100
 * lines, the gutter renderer will always set its width such as three digits can
 * be printed, even if only the first 20 lines are shown. Another strategy is to
 * take into account only the visible lines.  In this case, only two digits are
 * necessary to display the line numbers of the first 20 lines. To take another
 * example, the gutter renderer for #CtkSourceMark<!-- -->s doesn't need to take
 * into account the text buffer to announce its width. It only depends on the
 * icons size displayed in the gutter column.
 *
 * An horizontal and vertical padding can be added with
 * ctk_source_gutter_renderer_set_padding().  The total width of a gutter
 * renderer is its size (#CtkSourceGutterRenderer:size) plus two times the
 * horizontal padding (#CtkSourceGutterRenderer:xpad).
 *
 * When the available size to render a cell is greater than the required size to
 * render the cell contents, the cell contents can be aligned horizontally and
 * vertically with ctk_source_gutter_renderer_set_alignment().
 *
 * The cells rendering occurs in three phases:
 * - begin: the ctk_source_gutter_renderer_begin() function is called when some
 *   cells need to be redrawn. It provides the associated region of the
 *   #CtkTextBuffer. The cells need to be redrawn when the #CtkTextView is
 *   scrolled, or when the state of the cells change (see
 *   #CtkSourceGutterRendererState).
 * - draw: ctk_source_gutter_renderer_draw() is called for each cell that needs
 *   to be drawn.
 * - end: finally, ctk_source_gutter_renderer_end() is called.
 */

enum
{
	ACTIVATE,
	QUEUE_DRAW,
	QUERY_TOOLTIP,
	QUERY_DATA,
	QUERY_ACTIVATABLE,
	N_SIGNALS
};

struct _CtkSourceGutterRendererPrivate
{
	CtkTextView *view;
	CtkTextBuffer *buffer;
	CtkTextWindowType window_type;

	gint xpad;
	gint ypad;

	gfloat xalign;
	gfloat yalign;

	gint size;

	CtkSourceGutterRendererAlignmentMode alignment_mode;

	CdkRGBA background_color;

	guint background_set : 1;
	guint visible : 1;
};

static guint signals[N_SIGNALS];

G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (CtkSourceGutterRenderer, ctk_source_gutter_renderer, G_TYPE_INITIALLY_UNOWNED)

enum
{
	PROP_0,
	PROP_VISIBLE,
	PROP_XPAD,
	PROP_YPAD,
	PROP_XALIGN,
	PROP_YALIGN,
	PROP_VIEW,
	PROP_ALIGNMENT_MODE,
	PROP_WINDOW_TYPE,
	PROP_SIZE,
	PROP_BACKGROUND_RGBA,
	PROP_BACKGROUND_SET
};

static void
set_buffer (CtkSourceGutterRenderer *renderer,
            CtkTextBuffer           *buffer)
{
	if (renderer->priv->buffer != NULL)
	{
		g_object_remove_weak_pointer (G_OBJECT (renderer->priv->buffer),
		                              (gpointer) &renderer->priv->buffer);
	}

	if (buffer != NULL)
	{
		g_object_add_weak_pointer (G_OBJECT (buffer),
		                           (gpointer) &renderer->priv->buffer);
	}

	renderer->priv->buffer = buffer;
}

static void
emit_buffer_changed (CtkTextView             *view,
                     CtkSourceGutterRenderer *renderer)
{
	CtkTextBuffer* buffer;

	buffer = ctk_text_view_get_buffer (view);

	if (buffer != renderer->priv->buffer)
	{
		if (CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->change_buffer)
		{
			CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->change_buffer (renderer,
			                                                                renderer->priv->buffer);
		}

		set_buffer (renderer, buffer);
	}
}

static void
on_buffer_changed (CtkTextView             *view,
                   GParamSpec              *spec,
                   CtkSourceGutterRenderer *renderer)
{
	emit_buffer_changed (view, renderer);
}

static void
renderer_change_view_impl (CtkSourceGutterRenderer *renderer,
                           CtkTextView             *old_view)
{
	if (old_view)
	{
		g_signal_handlers_disconnect_by_func (old_view,
		                                      G_CALLBACK (on_buffer_changed),
		                                      renderer);
	}

	if (renderer->priv->view)
	{
		emit_buffer_changed (renderer->priv->view, renderer);

		g_signal_connect (renderer->priv->view,
		                  "notify::buffer",
		                  G_CALLBACK (on_buffer_changed),
		                  renderer);
	}
}

static void
ctk_source_gutter_renderer_dispose (GObject *object)
{
	CtkSourceGutterRenderer *renderer;

	renderer = CTK_SOURCE_GUTTER_RENDERER (object);

	set_buffer (renderer, NULL);

	if (renderer->priv->view)
	{
		_ctk_source_gutter_renderer_set_view (renderer,
		                                      NULL,
		                                      CTK_TEXT_WINDOW_PRIVATE);
	}

	G_OBJECT_CLASS (ctk_source_gutter_renderer_parent_class)->dispose (object);
}

static void
set_visible (CtkSourceGutterRenderer *renderer,
             gboolean                 visible)
{
	visible = visible != FALSE;

	if (renderer->priv->visible != visible)
	{
		renderer->priv->visible = visible;
		g_object_notify (G_OBJECT (renderer), "visible");

		ctk_source_gutter_renderer_queue_draw (renderer);
	}
}

static gboolean
set_padding (CtkSourceGutterRenderer *renderer,
             gint                    *field,
             gint                     padding,
             const gchar             *name)
{
	if (*field == padding || padding < 0)
	{
		return FALSE;
	}

	*field = padding;
	g_object_notify (G_OBJECT (renderer), name);

	return TRUE;
}

static gboolean
set_xpad (CtkSourceGutterRenderer *renderer,
          gint                     xpad)
{
	return set_padding (renderer,
	                    &renderer->priv->xpad,
	                    xpad,
	                    "xpad");
}

static gboolean
set_ypad (CtkSourceGutterRenderer *renderer,
          gint                     ypad)
{
	return set_padding (renderer,
	                    &renderer->priv->ypad,
	                    ypad,
	                    "ypad");
}

static gboolean
set_alignment (CtkSourceGutterRenderer *renderer,
               gfloat                  *field,
               gfloat                   align,
               const gchar             *name,
               gboolean                 emit)
{
	if (*field == align || align < 0)
	{
		return FALSE;
	}

	*field = align;
	g_object_notify (G_OBJECT (renderer), name);

	if (emit)
	{
		ctk_source_gutter_renderer_queue_draw (renderer);
	}

	return TRUE;
}

static gboolean
set_xalign (CtkSourceGutterRenderer *renderer,
            gfloat                   xalign,
            gboolean                 emit)
{
	return set_alignment (renderer,
	                      &renderer->priv->xalign,
	                      xalign,
	                      "xalign",
	                      emit);
}

static gboolean
set_yalign (CtkSourceGutterRenderer *renderer,
            gfloat                   yalign,
            gboolean                 emit)
{
	return set_alignment (renderer,
	                      &renderer->priv->yalign,
	                      yalign,
	                      "yalign",
	                      emit);
}

static void
set_alignment_mode (CtkSourceGutterRenderer              *renderer,
                    CtkSourceGutterRendererAlignmentMode  mode)
{
	if (renderer->priv->alignment_mode == mode)
	{
		return;
	}

	renderer->priv->alignment_mode = mode;
	g_object_notify (G_OBJECT (renderer), "alignment-mode");

	ctk_source_gutter_renderer_queue_draw (renderer);
}

static void
set_size (CtkSourceGutterRenderer *renderer,
          gint                     value)
{
	if (renderer->priv->size == value)
	{
		return;
	}

	renderer->priv->size = value;
	g_object_notify (G_OBJECT (renderer), "size");
}

static void
set_background_color_set (CtkSourceGutterRenderer *renderer,
                          gboolean                 isset)
{
	isset = (isset != FALSE);

	if (isset != renderer->priv->background_set)
	{
		renderer->priv->background_set = isset;
		ctk_source_gutter_renderer_queue_draw (renderer);
	}
}

static void
set_background_color (CtkSourceGutterRenderer *renderer,
                      const CdkRGBA          *color)
{
	if (!color)
	{
		set_background_color_set (renderer, FALSE);
	}
	else
	{
		renderer->priv->background_color = *color;
		renderer->priv->background_set = TRUE;

		ctk_source_gutter_renderer_queue_draw (renderer);
	}
}

static void
ctk_source_gutter_renderer_set_property (GObject      *object,
                                         guint         prop_id,
                                         const GValue *value,
                                         GParamSpec   *pspec)
{
	CtkSourceGutterRenderer *self = CTK_SOURCE_GUTTER_RENDERER (object);

	switch (prop_id)
	{
		case PROP_VISIBLE:
			set_visible (self, g_value_get_boolean (value));
			break;
		case PROP_XPAD:
			set_xpad (self, g_value_get_int (value));
			break;
		case PROP_YPAD:
			set_ypad (self, g_value_get_int (value));
			break;
		case PROP_XALIGN:
			set_xalign (self, g_value_get_float (value), TRUE);
			break;
		case PROP_YALIGN:
			set_yalign (self, g_value_get_float (value), TRUE);
			break;
		case PROP_ALIGNMENT_MODE:
			set_alignment_mode (self, g_value_get_enum (value));
			break;
		case PROP_VIEW:
			self->priv->view = g_value_get_object (value);
			break;
		case PROP_WINDOW_TYPE:
			self->priv->window_type = g_value_get_enum (value);
			break;
		case PROP_SIZE:
			set_size (self, g_value_get_int (value));
			break;
		case PROP_BACKGROUND_RGBA:
			set_background_color (self,
			                      g_value_get_boxed (value));
			break;
		case PROP_BACKGROUND_SET:
			set_background_color_set (self,
			                          g_value_get_boolean (value));
			break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
			break;
	}
}

static void
ctk_source_gutter_renderer_get_property (GObject    *object,
                                         guint       prop_id,
                                         GValue     *value,
                                         GParamSpec *pspec)
{
	CtkSourceGutterRenderer *self = CTK_SOURCE_GUTTER_RENDERER (object);

	switch (prop_id)
	{
		case PROP_VISIBLE:
			g_value_set_boolean (value, self->priv->visible);
			break;
		case PROP_XPAD:
			g_value_set_int (value, self->priv->xpad);
			break;
		case PROP_YPAD:
			g_value_set_int (value, self->priv->ypad);
			break;
		case PROP_XALIGN:
			g_value_set_float (value, self->priv->xalign);
			break;
		case PROP_YALIGN:
			g_value_set_float (value, self->priv->yalign);
			break;
		case PROP_VIEW:
			g_value_set_object (value, self->priv->view);
			break;
		case PROP_ALIGNMENT_MODE:
			g_value_set_enum (value, self->priv->alignment_mode);
			break;
		case PROP_WINDOW_TYPE:
			g_value_set_enum (value, self->priv->window_type);
			break;
		case PROP_SIZE:
			g_value_set_int (value, self->priv->size);
			break;
		case PROP_BACKGROUND_RGBA:
			g_value_set_boxed (value, &self->priv->background_color);
			break;
		case PROP_BACKGROUND_SET:
			g_value_set_boolean (value, self->priv->background_set);
			break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
			break;
	}
}

static void
renderer_draw_impl (CtkSourceGutterRenderer      *renderer,
                    cairo_t                      *cr,
                    CdkRectangle                 *background_area,
                    CdkRectangle                 *cell_area,
                    CtkTextIter                  *start,
                    CtkTextIter                  *end,
                    CtkSourceGutterRendererState  state)
{
	if (renderer->priv->background_set)
	{
		cairo_save (cr);
		cdk_cairo_rectangle (cr, background_area);
		cdk_cairo_set_source_rgba (cr, &renderer->priv->background_color);
		cairo_fill (cr);
		cairo_restore (cr);
	}
	else if ((state & CTK_SOURCE_GUTTER_RENDERER_STATE_CURSOR) != 0 &&
		 CTK_SOURCE_IS_VIEW (renderer->priv->view) &&
		 ctk_source_view_get_highlight_current_line (CTK_SOURCE_VIEW (renderer->priv->view)))
	{
		CtkStyleContext *context;

		context = ctk_widget_get_style_context (CTK_WIDGET (renderer->priv->view));

		ctk_style_context_save (context);
		ctk_style_context_add_class (context, "current-line-number");

		ctk_render_background (context,
				       cr,
				       background_area->x,
				       background_area->y,
				       background_area->width,
				       background_area->height);

		ctk_style_context_restore (context);
	}
}

static void
ctk_source_gutter_renderer_class_init (CtkSourceGutterRendererClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	object_class->dispose = ctk_source_gutter_renderer_dispose;

	object_class->get_property = ctk_source_gutter_renderer_get_property;
	object_class->set_property = ctk_source_gutter_renderer_set_property;

	klass->draw = renderer_draw_impl;
	klass->change_view = renderer_change_view_impl;

	/**
	 * CtkSourceGutterRenderer:visible:
	 *
	 * The visibility of the renderer.
	 *
	 **/
	g_object_class_install_property (object_class,
	                                 PROP_VISIBLE,
	                                 g_param_spec_boolean ("visible",
	                                                       "Visible",
	                                                       "Visible",
	                                                       TRUE,
	                                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer:xpad:
	 *
	 * The left and right padding of the renderer.
	 */
	g_object_class_install_property (object_class,
	                                 PROP_XPAD,
	                                 g_param_spec_int ("xpad",
	                                                   "X Padding",
	                                                   "The x-padding",
	                                                   -1,
	                                                   G_MAXINT,
	                                                   0,
	                                                   G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer:ypad:
	 *
	 * The top and bottom padding of the renderer.
	 */
	g_object_class_install_property (object_class,
	                                 PROP_YPAD,
	                                 g_param_spec_int ("ypad",
	                                                   "Y Padding",
	                                                   "The y-padding",
	                                                   -1,
	                                                   G_MAXINT,
	                                                   0,
	                                                   G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer:xalign:
	 *
	 * The horizontal alignment of the renderer. Set to 0 for a left
	 * alignment. 1 for a right alignment. And 0.5 for centering the cells.
	 * A value lower than 0 doesn't modify the alignment.
	 */
	g_object_class_install_property (object_class,
	                                 PROP_XALIGN,
	                                 g_param_spec_float ("xalign",
	                                                     "X Alignment",
	                                                     "The x-alignment",
	                                                     -1,
	                                                     1,
	                                                     0,
	                                                     G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer:yalign:
	 *
	 * The vertical alignment of the renderer. Set to 0 for a top
	 * alignment. 1 for a bottom alignment. And 0.5 for centering the cells.
	 * A value lower than 0 doesn't modify the alignment.
	 */
	g_object_class_install_property (object_class,
	                                 PROP_YALIGN,
	                                 g_param_spec_float ("yalign",
	                                                     "Y Alignment",
	                                                     "The y-alignment",
	                                                     -1,
	                                                     1,
	                                                     0,
	                                                     G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer::activate:
	 * @renderer: the #CtkSourceGutterRenderer who emits the signal
	 * @iter: a #CtkTextIter
	 * @area: a #CdkRectangle
	 * @event: the event that caused the activation
	 *
	 * The ::activate signal is emitted when the renderer is
	 * activated.
	 *
	 */
	signals[ACTIVATE] =
		g_signal_new ("activate",
		              G_TYPE_FROM_CLASS (object_class),
		              G_SIGNAL_RUN_LAST,
		              G_STRUCT_OFFSET (CtkSourceGutterRendererClass, activate),
		              NULL, NULL,
		              _ctk_source_marshal_VOID__BOXED_BOXED_BOXED,
		              G_TYPE_NONE,
		              3,
		              CTK_TYPE_TEXT_ITER,
		              CDK_TYPE_RECTANGLE,
		              CDK_TYPE_EVENT);
	g_signal_set_va_marshaller (signals[ACTIVATE],
	                            G_TYPE_FROM_CLASS (klass),
	                            _ctk_source_marshal_VOID__BOXED_BOXED_BOXEDv);

	/**
	 * CtkSourceGutterRenderer::queue-draw:
	 * @renderer: the #CtkSourceGutterRenderer who emits the signal
	 *
	 * The ::queue-draw signal is emitted when the renderer needs
	 * to be redrawn. Use ctk_source_gutter_renderer_queue_draw()
	 * to emit this signal from an implementation of the
	 * #CtkSourceGutterRenderer interface.
	 */
	signals[QUEUE_DRAW] =
		g_signal_new ("queue-draw",
		              G_TYPE_FROM_CLASS (object_class),
		              G_SIGNAL_RUN_LAST,
		              G_STRUCT_OFFSET (CtkSourceGutterRendererClass, queue_draw),
		              NULL, NULL,
		              g_cclosure_marshal_VOID__VOID,
		              G_TYPE_NONE, 0);
	g_signal_set_va_marshaller (signals[QUEUE_DRAW],
	                            G_TYPE_FROM_CLASS (klass),
	                            g_cclosure_marshal_VOID__VOIDv);

	/**
	 * CtkSourceGutterRenderer::query-tooltip:
	 * @renderer: the #CtkSourceGutterRenderer who emits the signal
	 * @iter: a #CtkTextIter
	 * @area: a #CdkRectangle
	 * @x: the x position (in window coordinates)
	 * @y: the y position (in window coordinates)
	 * @tooltip: a #CtkTooltip
	 *
	 * The ::query-tooltip signal is emitted when the renderer can
	 * show a tooltip.
	 *
	 */
	signals[QUERY_TOOLTIP] =
		g_signal_new ("query-tooltip",
		              G_TYPE_FROM_CLASS (object_class),
		              G_SIGNAL_RUN_LAST,
		              G_STRUCT_OFFSET (CtkSourceGutterRendererClass, query_tooltip),
		              g_signal_accumulator_true_handled,
		              NULL,
		              _ctk_source_marshal_BOOLEAN__BOXED_BOXED_INT_INT_OBJECT,
		              G_TYPE_BOOLEAN,
		              5,
		              CTK_TYPE_TEXT_ITER,
		              CDK_TYPE_RECTANGLE,
		              G_TYPE_INT,
		              G_TYPE_INT,
		              CTK_TYPE_TOOLTIP);
	g_signal_set_va_marshaller (signals[QUERY_TOOLTIP],
	                            G_TYPE_FROM_CLASS (klass),
	                            _ctk_source_marshal_BOOLEAN__BOXED_BOXED_INT_INT_OBJECTv);

	/**
	 * CtkSourceGutterRenderer::query-data:
	 * @renderer: the #CtkSourceGutterRenderer who emits the signal
	 * @start: a #CtkTextIter
	 * @end: a #CtkTextIter
	 * @state: the renderer state
	 *
	 * The ::query-data signal is emitted when the renderer needs
	 * to be filled with data just before a cell is drawn. This can
	 * be used by general renderer implementations to allow render
	 * data to be filled in externally.
	 *
	 */
	signals[QUERY_DATA] =
		g_signal_new ("query-data",
		              G_TYPE_FROM_CLASS (object_class),
		              G_SIGNAL_RUN_LAST,
		              G_STRUCT_OFFSET (CtkSourceGutterRendererClass, query_data),
		              NULL, NULL,
			      _ctk_source_marshal_VOID__BOXED_BOXED_FLAGS,
		              G_TYPE_NONE,
		              3,
		              CTK_TYPE_TEXT_ITER,
		              CTK_TYPE_TEXT_ITER,
		              CTK_SOURCE_TYPE_GUTTER_RENDERER_STATE);
	g_signal_set_va_marshaller (signals[QUERY_DATA],
	                            G_TYPE_FROM_CLASS (klass),
	                            _ctk_source_marshal_VOID__BOXED_BOXED_FLAGSv);

	/**
	 * CtkSourceGutterRenderer::query-activatable:
	 * @renderer: the #CtkSourceGutterRenderer who emits the signal
	 * @iter: a #CtkTextIter
	 * @area: a #CdkRectangle
	 * @event: the #CdkEvent that is causing the activatable query
	 *
	 * The ::query-activatable signal is emitted when the renderer
	 * can possibly be activated.
	 *
	 */
	signals[QUERY_ACTIVATABLE] =
		g_signal_new ("query-activatable",
		              G_TYPE_FROM_CLASS (object_class),
		              G_SIGNAL_RUN_LAST,
		              G_STRUCT_OFFSET (CtkSourceGutterRendererClass, query_activatable),
		              g_signal_accumulator_true_handled,
		              NULL,
		              _ctk_source_marshal_BOOLEAN__BOXED_BOXED_BOXED,
		              G_TYPE_BOOLEAN,
		              3,
		              CTK_TYPE_TEXT_ITER,
		              CDK_TYPE_RECTANGLE,
		              CDK_TYPE_EVENT);
	g_signal_set_va_marshaller (signals[QUERY_ACTIVATABLE],
	                            G_TYPE_FROM_CLASS (klass),
	                            _ctk_source_marshal_BOOLEAN__BOXED_BOXED_BOXEDv);

	/**
	 * CtkSourceGutterRenderer:view:
	 *
	 * The view on which the renderer is placed.
	 *
	 **/
	g_object_class_install_property (object_class,
	                                 PROP_VIEW,
	                                 g_param_spec_object ("view",
	                                                      "The View",
	                                                      "The view",
	                                                      CTK_TYPE_TEXT_VIEW,
	                                                      G_PARAM_READABLE));

	/**
	 * CtkSourceGutterRenderer:alignment-mode:
	 *
	 * The alignment mode of the renderer. This can be used to indicate
	 * that in the case a cell spans multiple lines (due to text wrapping)
	 * the alignment should work on either the full cell, the first line
	 * or the last line.
	 *
	 **/
	g_object_class_install_property (object_class,
	                                 PROP_ALIGNMENT_MODE,
	                                 g_param_spec_enum ("alignment-mode",
	                                                    "Alignment Mode",
	                                                    "The alignment mode",
	                                                    CTK_SOURCE_TYPE_GUTTER_RENDERER_ALIGNMENT_MODE,
	                                                    CTK_SOURCE_GUTTER_RENDERER_ALIGNMENT_MODE_CELL,
	                                                    G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	/**
	 * CtkSourceGutterRenderer:window-type:
	 *
	 * The window type of the view on which the renderer is placed (left,
	 * or right).
	 *
	 **/
	g_object_class_install_property (object_class,
	                                 PROP_WINDOW_TYPE,
	                                 g_param_spec_enum ("window-type",
	                                                    "Window Type",
	                                                    "The window type",
	                                                    CTK_TYPE_TEXT_WINDOW_TYPE,
	                                                    CTK_TEXT_WINDOW_PRIVATE,
	                                                    G_PARAM_READABLE));

	g_object_class_install_property (object_class,
	                                 PROP_SIZE,
	                                 g_param_spec_int ("size",
	                                                   "Size",
	                                                   "The size",
	                                                   0,
	                                                   G_MAXINT,
	                                                   0,
	                                                   G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

	g_object_class_install_property (object_class,
	                                 PROP_BACKGROUND_RGBA,
	                                 g_param_spec_boxed ("background-rgba",
	                                                     "Background Color",
	                                                     "The background color",
	                                                     CDK_TYPE_RGBA,
	                                                     G_PARAM_READWRITE));

	g_object_class_install_property (object_class,
	                                 PROP_BACKGROUND_SET,
	                                 g_param_spec_boolean ("background-set",
	                                                       "Background Set",
	                                                       "Whether the background color is set",
	                                                       FALSE,
	                                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
}

static void
ctk_source_gutter_renderer_init (CtkSourceGutterRenderer *self)
{
	self->priv = ctk_source_gutter_renderer_get_instance_private (self);
}

/**
 * ctk_source_gutter_renderer_begin:
 * @renderer: a #CtkSourceGutterRenderer
 * @cr: a #cairo_t
 * @background_area: a #CdkRectangle
 * @cell_area: a #CdkRectangle
 * @start: a #CtkTextIter
 * @end: a #CtkTextIter
 *
 * Called when drawing a region begins. The region to be drawn is indicated
 * by @start and @end. The purpose is to allow the implementation to precompute
 * some state before the draw method is called for each cell.
 */
void
ctk_source_gutter_renderer_begin (CtkSourceGutterRenderer *renderer,
                                  cairo_t                 *cr,
                                  CdkRectangle            *background_area,
                                  CdkRectangle            *cell_area,
                                  CtkTextIter             *start,
                                  CtkTextIter             *end)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));
	g_return_if_fail (cr != NULL);
	g_return_if_fail (background_area != NULL);
	g_return_if_fail (cell_area != NULL);
	g_return_if_fail (start != NULL);
	g_return_if_fail (end != NULL);

	if (CTK_SOURCE_GUTTER_RENDERER_CLASS (G_OBJECT_GET_CLASS (renderer))->begin)
	{
		CTK_SOURCE_GUTTER_RENDERER_CLASS (
			G_OBJECT_GET_CLASS (renderer))->begin (renderer,
			                                       cr,
			                                       background_area,
			                                       cell_area,
			                                       start,
			                                       end);
	}
}

/**
 * ctk_source_gutter_renderer_draw:
 * @renderer: a #CtkSourceGutterRenderer
 * @cr: the cairo render context
 * @background_area: a #CdkRectangle indicating the total area to be drawn
 * @cell_area: a #CdkRectangle indicating the area to draw content
 * @start: a #CtkTextIter
 * @end: a #CtkTextIter
 * @state: a #CtkSourceGutterRendererState
 *
 * Main renderering method. Implementations should implement this method to draw
 * onto the cairo context. The @background_area indicates the total area of the
 * cell to be drawn. The @cell_area indicates the area where content can be
 * drawn (text, images, etc).
 *
 * The @background_area is the @cell_area plus the padding on each side (two
 * times the #CtkSourceGutterRenderer:xpad horizontally and two times the
 * #CtkSourceGutterRenderer:ypad vertically, so that the @cell_area is centered
 * inside @background_area).
 *
 * The @state argument indicates the current state of the renderer and should
 * be taken into account to properly draw the different possible states
 * (cursor, prelit, selected) if appropriate.
 */
void
ctk_source_gutter_renderer_draw (CtkSourceGutterRenderer      *renderer,
                                 cairo_t                      *cr,
                                 CdkRectangle                 *background_area,
                                 CdkRectangle                 *cell_area,
                                 CtkTextIter                  *start,
                                 CtkTextIter                  *end,
                                 CtkSourceGutterRendererState  state)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));
	g_return_if_fail (cr != NULL);
	g_return_if_fail (background_area != NULL);
	g_return_if_fail (cell_area != NULL);
	g_return_if_fail (start != NULL);
	g_return_if_fail (end != NULL);

	if (CTK_SOURCE_GUTTER_RENDERER_CLASS (G_OBJECT_GET_CLASS (renderer))->draw)
	{
		CTK_SOURCE_GUTTER_RENDERER_CLASS (
			G_OBJECT_GET_CLASS (renderer))->draw (renderer,
			                                      cr,
			                                      background_area,
			                                      cell_area,
			                                      start,
			                                      end,
			                                      state);
	}
}

/**
 * ctk_source_gutter_renderer_end:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Called when drawing a region of lines has ended.
 *
 **/
void
ctk_source_gutter_renderer_end (CtkSourceGutterRenderer *renderer)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	if (CTK_SOURCE_GUTTER_RENDERER_CLASS (G_OBJECT_GET_CLASS (renderer))->end)
	{
		CTK_SOURCE_GUTTER_RENDERER_CLASS (G_OBJECT_GET_CLASS (renderer))->end (renderer);
	}
}

/**
 * ctk_source_gutter_renderer_query_activatable:
 * @renderer: a #CtkSourceGutterRenderer
 * @iter: a #CtkTextIter at the start of the line to be activated
 * @area: a #CdkRectangle of the cell area to be activated
 * @event: the event that triggered the query
 *
 * Get whether the renderer is activatable at the location in @event. This is
 * called from #CtkSourceGutter to determine whether a renderer is activatable
 * using the mouse pointer.
 *
 * Returns: %TRUE if the renderer can be activated, %FALSE otherwise
 *
 **/
gboolean
ctk_source_gutter_renderer_query_activatable (CtkSourceGutterRenderer *renderer,
                                              CtkTextIter             *iter,
                                              CdkRectangle            *area,
                                              CdkEvent                *event)
{
	gboolean ret;

	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), FALSE);
	g_return_val_if_fail (iter != NULL, FALSE);
	g_return_val_if_fail (area != NULL, FALSE);
	g_return_val_if_fail (event != NULL, FALSE);

	ret = FALSE;

	g_signal_emit (renderer,
	               signals[QUERY_ACTIVATABLE],
	               0,
	               iter,
	               area,
	               event,
	               &ret);

	return ret;
}

/**
 * ctk_source_gutter_renderer_activate:
 * @renderer: a #CtkSourceGutterRenderer
 * @iter: a #CtkTextIter at the start of the line where the renderer is activated
 * @area: a #CdkRectangle of the cell area where the renderer is activated
 * @event: the event that triggered the activation
 *
 * Emits the #CtkSourceGutterRenderer::activate signal of the renderer. This is
 * called from #CtkSourceGutter and should never have to be called manually.
 */
void
ctk_source_gutter_renderer_activate (CtkSourceGutterRenderer *renderer,
                                     CtkTextIter             *iter,
                                     CdkRectangle            *area,
                                     CdkEvent                *event)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));
	g_return_if_fail (iter != NULL);
	g_return_if_fail (area != NULL);
	g_return_if_fail (event != NULL);

	g_signal_emit (renderer, signals[ACTIVATE], 0, iter, area, event);
}

/**
 * ctk_source_gutter_renderer_queue_draw:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Emits the #CtkSourceGutterRenderer::queue-draw signal of the renderer. Call
 * this from an implementation to inform that the renderer has changed such that
 * it needs to redraw.
 */
void
ctk_source_gutter_renderer_queue_draw (CtkSourceGutterRenderer *renderer)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	g_signal_emit (renderer, signals[QUEUE_DRAW], 0);
}

/**
 * ctk_source_gutter_renderer_query_tooltip:
 * @renderer: a #CtkSourceGutterRenderer.
 * @iter: a #CtkTextIter.
 * @area: a #CdkRectangle.
 * @x: The x position of the tooltip.
 * @y: The y position of the tooltip.
 * @tooltip: a #CtkTooltip.
 *
 * Emits the #CtkSourceGutterRenderer::query-tooltip signal. This function is
 * called from #CtkSourceGutter. Implementations can override the default signal
 * handler or can connect to the signal externally.
 *
 * Returns: %TRUE if the tooltip has been set, %FALSE otherwise
 */
gboolean
ctk_source_gutter_renderer_query_tooltip (CtkSourceGutterRenderer *renderer,
                                          CtkTextIter             *iter,
                                          CdkRectangle            *area,
                                          gint                     x,
                                          gint                     y,
                                          CtkTooltip              *tooltip)
{
	gboolean ret;

	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), FALSE);
	g_return_val_if_fail (iter != NULL, FALSE);
	g_return_val_if_fail (area != NULL, FALSE);
	g_return_val_if_fail (CTK_IS_TOOLTIP (tooltip), FALSE);

	ret = FALSE;

	g_signal_emit (renderer,
	               signals[QUERY_TOOLTIP],
	               0,
	               iter,
	               area,
	               x,
	               y,
	               tooltip,
	               &ret);

	return ret;
}

/**
 * ctk_source_gutter_renderer_query_data:
 * @renderer: a #CtkSourceGutterRenderer.
 * @start: a #CtkTextIter.
 * @end: a #CtkTextIter.
 * @state: a #CtkSourceGutterRendererState.
 *
 * Emit the #CtkSourceGutterRenderer::query-data signal. This function is called
 * to query for data just before rendering a cell. This is called from the
 * #CtkSourceGutter.  Implementations can override the default signal handler or
 * can connect a signal handler externally to the
 * #CtkSourceGutterRenderer::query-data signal.
 */
void
ctk_source_gutter_renderer_query_data (CtkSourceGutterRenderer      *renderer,
                                       CtkTextIter                  *start,
                                       CtkTextIter                  *end,
                                       CtkSourceGutterRendererState  state)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));
	g_return_if_fail (start != NULL);
	g_return_if_fail (end != NULL);


	/* Signal emission is relatively expensive and this code path is
	 * frequent enough to optimize the common case where we only have the
	 * override and no connected handlers.
	 *
	 * This is the same trick used by ctk_widget_draw().
	 */
	if (G_UNLIKELY (g_signal_has_handler_pending (renderer, signals[QUERY_DATA], 0, FALSE)))
	{
		g_signal_emit (renderer, signals[QUERY_DATA], 0, start, end, state);
	}
	else if (CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->query_data)
	{
		CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->query_data (renderer, start, end, state);
	}
}

/**
 * ctk_source_gutter_renderer_set_visible:
 * @renderer: a #CtkSourceGutterRenderer
 * @visible: the visibility
 *
 * Set whether the gutter renderer is visible.
 *
 **/
void
ctk_source_gutter_renderer_set_visible (CtkSourceGutterRenderer *renderer,
                                        gboolean                 visible)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	set_visible (renderer, visible);
}

/**
 * ctk_source_gutter_renderer_get_visible:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Get whether the gutter renderer is visible.
 *
 * Returns: %TRUE if the renderer is visible, %FALSE otherwise
 *
 **/
gboolean
ctk_source_gutter_renderer_get_visible (CtkSourceGutterRenderer *renderer)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), FALSE);

	return renderer->priv->visible;
}

/**
 * ctk_source_gutter_renderer_set_padding:
 * @renderer: a #CtkSourceGutterRenderer
 * @xpad: the x-padding
 * @ypad: the y-padding
 *
 * Set the padding of the gutter renderer. Both @xpad and @ypad can be
 * -1, which means the values will not be changed (this allows changing only
 * one of the values).
 *
 * @xpad is the left and right padding. @ypad is the top and bottom padding.
 */
void
ctk_source_gutter_renderer_set_padding (CtkSourceGutterRenderer *renderer,
                                        gint                     xpad,
                                        gint                     ypad)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	set_xpad (renderer, xpad);
	set_ypad (renderer, ypad);
}

/**
 * ctk_source_gutter_renderer_get_padding:
 * @renderer: a #CtkSourceGutterRenderer
 * @xpad: (out caller-allocates) (optional): return location for the x-padding,
 *   or %NULL to ignore.
 * @ypad: (out caller-allocates) (optional): return location for the y-padding,
 *   or %NULL to ignore.
 *
 * Get the x-padding and y-padding of the gutter renderer.
 */
void
ctk_source_gutter_renderer_get_padding (CtkSourceGutterRenderer *renderer,
                                        gint                    *xpad,
                                        gint                    *ypad)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	if (xpad)
	{
		*xpad = renderer->priv->xpad;
	}

	if (ypad)
	{
		*ypad = renderer->priv->ypad;
	}
}

/**
 * ctk_source_gutter_renderer_set_alignment:
 * @renderer: a #CtkSourceGutterRenderer
 * @xalign: the x-alignment
 * @yalign: the y-alignment
 *
 * Set the alignment of the gutter renderer. Both @xalign and @yalign can be
 * -1, which means the values will not be changed (this allows changing only
 * one of the values).
 *
 * @xalign is the horizontal alignment. Set to 0 for a left alignment. 1 for a
 * right alignment. And 0.5 for centering the cells. @yalign is the vertical
 * alignment. Set to 0 for a top alignment. 1 for a bottom alignment.
 */
void
ctk_source_gutter_renderer_set_alignment (CtkSourceGutterRenderer *renderer,
                                          gfloat                   xalign,
                                          gfloat                   yalign)
{
	gboolean changed_x;
	gboolean changed_y;

	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	changed_x = set_xalign (renderer, xalign, FALSE);
	changed_y = set_yalign (renderer, yalign, FALSE);

	if (changed_x || changed_y)
	{
		ctk_source_gutter_renderer_queue_draw (renderer);
	}
}

/**
 * ctk_source_gutter_renderer_get_alignment:
 * @renderer: a #CtkSourceGutterRenderer
 * @xalign: (out caller-allocates) (optional): return location for the x-alignment,
 *   or %NULL to ignore.
 * @yalign: (out caller-allocates) (optional): return location for the y-alignment,
 *   or %NULL to ignore.
 *
 * Get the x-alignment and y-alignment of the gutter renderer.
 */
void
ctk_source_gutter_renderer_get_alignment (CtkSourceGutterRenderer *renderer,
                                          gfloat                  *xalign,
                                          gfloat                  *yalign)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	if (xalign)
	{
		*xalign = renderer->priv->xalign;
	}

	if (yalign)
	{
		*yalign = renderer->priv->yalign;
	}
}

/**
 * ctk_source_gutter_renderer_set_alignment_mode:
 * @renderer: a #CtkSourceGutterRenderer
 * @mode: a #CtkSourceGutterRendererAlignmentMode
 *
 * Set the alignment mode. The alignment mode describes the manner in which the
 * renderer is aligned (see :xalign and :yalign).
 *
 **/
void
ctk_source_gutter_renderer_set_alignment_mode (CtkSourceGutterRenderer              *renderer,
                                               CtkSourceGutterRendererAlignmentMode  mode)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	set_alignment_mode (renderer, mode);
}

/**
 * ctk_source_gutter_renderer_get_alignment_mode:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Get the alignment mode. The alignment mode describes the manner in which the
 * renderer is aligned (see :xalign and :yalign).
 *
 * Returns: a #CtkSourceGutterRendererAlignmentMode
 *
 **/
CtkSourceGutterRendererAlignmentMode
ctk_source_gutter_renderer_get_alignment_mode (CtkSourceGutterRenderer *renderer)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), 0);

	return renderer->priv->alignment_mode;
}

/**
 * ctk_source_gutter_renderer_get_window_type:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Get the #CtkTextWindowType associated with the gutter renderer.
 *
 * Returns: a #CtkTextWindowType
 *
 **/
CtkTextWindowType
ctk_source_gutter_renderer_get_window_type (CtkSourceGutterRenderer *renderer)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), CTK_TEXT_WINDOW_PRIVATE);

	return renderer->priv->window_type;
}

/**
 * ctk_source_gutter_renderer_get_view:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Get the view associated to the gutter renderer
 *
 * Returns: (transfer none): a #CtkTextView
 *
 **/
CtkTextView *
ctk_source_gutter_renderer_get_view (CtkSourceGutterRenderer *renderer)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), NULL);

	return renderer->priv->view;
}

/**
 * ctk_source_gutter_renderer_get_size:
 * @renderer: a #CtkSourceGutterRenderer
 *
 * Get the size of the renderer.
 *
 * Returns: the size of the renderer.
 *
 **/
gint
ctk_source_gutter_renderer_get_size (CtkSourceGutterRenderer *renderer)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), 0);

	return renderer->priv->size;
}

/**
 * ctk_source_gutter_renderer_set_size:
 * @renderer: a #CtkSourceGutterRenderer
 * @size: the size
 *
 * Sets the size of the renderer. A value of -1 specifies that the size
 * is to be determined dynamically.
 *
 **/
void
ctk_source_gutter_renderer_set_size (CtkSourceGutterRenderer *renderer,
                                     gint                     size)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	set_size (renderer, size);
}

/**
 * ctk_source_gutter_renderer_get_background:
 * @renderer: a #CtkSourceGutterRenderer
 * @color: (out caller-allocates) (optional): return value for a #CdkRGBA
 *
 * Get the background color of the renderer.
 *
 * Returns: %TRUE if the background color is set, %FALSE otherwise
 *
 **/
gboolean
ctk_source_gutter_renderer_get_background (CtkSourceGutterRenderer *renderer,
                                           CdkRGBA                 *color)
{
	g_return_val_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer), FALSE);

	if (color)
	{
		*color = renderer->priv->background_color;
	}

	return renderer->priv->background_set;
}

/**
 * ctk_source_gutter_renderer_set_background:
 * @renderer: a #CtkSourceGutterRenderer
 * @color: (nullable): a #CdkRGBA or %NULL
 *
 * Set the background color of the renderer. If @color is set to %NULL, the
 * renderer will not have a background color.
 *
 */
void
ctk_source_gutter_renderer_set_background (CtkSourceGutterRenderer *renderer,
                                           const CdkRGBA           *color)
{
	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));

	set_background_color (renderer, color);
}

void
_ctk_source_gutter_renderer_set_view (CtkSourceGutterRenderer *renderer,<--- The function '_ctk_source_gutter_renderer_set_view' should have static linkage since it is not used outside of its translation unit.
                                      CtkTextView             *view,
                                      CtkTextWindowType        window_type)
{
	CtkTextView *old_view;

	g_return_if_fail (CTK_SOURCE_IS_GUTTER_RENDERER (renderer));
	g_return_if_fail (view == NULL || CTK_IS_TEXT_VIEW (view));

	old_view = renderer->priv->view;

	renderer->priv->window_type = window_type;
	renderer->priv->view = view != NULL ? g_object_ref (view) : NULL;

	if (CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->change_view)
	{
		CTK_SOURCE_GUTTER_RENDERER_GET_CLASS (renderer)->change_view (renderer,
		                                                              old_view);
	}

	if (old_view)
	{
		g_object_unref (old_view);
	}

	g_object_notify (G_OBJECT (renderer), "view");
	g_object_notify (G_OBJECT (renderer), "window_type");
}