[gnome-photos] Add PhotosToolCropHelper

[Debarshi Ray <debarshir src gnome org>]

commit 7bafb966f2018a9cdabdcf222ffa9f8571871834
Author: Umang Jain <mailumangjain gmail com>
Date:   Tue Dec 26 15:28:57 2017 +0530

    Add PhotosToolCropHelper
    
    This helper object's properties are meant to be animated by
    EggAnimation instead of having them directly on PhotosToolCrop. This
    prevents these implementation details from being exposed to users of
    the tool.
    
    Some changes by Debarshi Ray.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791274

 src/Makefile.am               |   2 +
 src/photos-tool-crop-helper.c | 292 ++++++++++++++++++++++++++++++++++++++++++
 src/photos-tool-crop-helper.h |  52 ++++++++
 3 files changed, 346 insertions(+)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index b91f6e64..b397c814 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -264,6 +264,8 @@ gnome_photos_SOURCES = \
        photos-tool-colors.h \
        photos-tool-crop.c \
        photos-tool-crop.h \
+       photos-tool-crop-helper.c \
+       photos-tool-crop-helper.h \
        photos-tool-enhance.c \
        photos-tool-enhance.h \
        photos-tool-filter-button.c \
diff --git a/src/photos-tool-crop-helper.c b/src/photos-tool-crop-helper.c
new file mode 100644
index 00000000..ac14b517
--- /dev/null
+++ b/src/photos-tool-crop-helper.c
@@ -0,0 +1,292 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2018 Red Hat, Inc.
+ * Copyright © 2017 Umang Jain
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+
+#include "config.h"
+
+#include "photos-tool-crop-helper.h"
+#include "photos-utils.h"
+
+
+struct _PhotosToolCropHelper
+{
+  GObject parent_instance;
+  gdouble height;
+  gdouble width;
+  gdouble x;
+  gdouble y;
+};
+
+enum
+{
+  PROP_0,
+  PROP_HEIGHT,
+  PROP_WIDTH,
+  PROP_X,
+  PROP_Y
+};
+
+
+G_DEFINE_TYPE (PhotosToolCropHelper, photos_tool_crop_helper, G_TYPE_OBJECT);
+
+
+static void
+photos_tool_crop_helper_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  PhotosToolCropHelper *self = PHOTOS_TOOL_CROP_HELPER (object);
+
+  switch (prop_id)
+    {
+    case PROP_HEIGHT:
+      g_value_set_double (value, self->height);
+      break;
+
+    case PROP_WIDTH:
+      g_value_set_double (value, self->width);
+      break;
+
+    case PROP_X:
+      g_value_set_double (value, self->x);
+      break;
+
+    case PROP_Y:
+      g_value_set_double (value, self->y);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+photos_tool_crop_helper_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  PhotosToolCropHelper *self = PHOTOS_TOOL_CROP_HELPER (object);
+
+  switch (prop_id)
+    {
+    case PROP_HEIGHT:
+      {
+        gdouble height;
+
+        height = g_value_get_double (value);
+        photos_tool_crop_helper_set_height (self, height);
+        break;
+      }
+
+    case PROP_WIDTH:
+      {
+        gdouble width;
+
+        width = g_value_get_double (value);
+        photos_tool_crop_helper_set_width (self, width);
+        break;
+      }
+
+    case PROP_X:
+      {
+        gdouble x;
+
+        x = g_value_get_double (value);
+        photos_tool_crop_helper_set_x (self, x);
+        break;
+      }
+
+    case PROP_Y:
+      {
+        gdouble y;
+
+        y = g_value_get_double (value);
+        photos_tool_crop_helper_set_y (self, y);
+        break;
+      }
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+photos_tool_crop_helper_init (PhotosToolCropHelper *self)
+{
+}
+
+
+static void
+photos_tool_crop_helper_class_init (PhotosToolCropHelperClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->get_property = photos_tool_crop_helper_get_property;
+  object_class->set_property = photos_tool_crop_helper_set_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_HEIGHT,
+                                   g_param_spec_double ("height",
+                                                        "Height",
+                                                        "Height of the crop rectangle",
+                                                        0.0,
+                                                        G_MAXDOUBLE,
+                                                        0.0,
+                                                        G_PARAM_EXPLICIT_NOTIFY | G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class,
+                                   PROP_WIDTH,
+                                   g_param_spec_double ("width",
+                                                        "Width",
+                                                        "Width of the crop rectangle",
+                                                        0.0,
+                                                        G_MAXDOUBLE,
+                                                        0.0,
+                                                        G_PARAM_EXPLICIT_NOTIFY | G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class,
+                                   PROP_X,
+                                   g_param_spec_double ("x",
+                                                        "X",
+                                                        "X co-ordinate of top-left corner of the crop 
rectangle",
+                                                        0.0,
+                                                        G_MAXDOUBLE,
+                                                        0.0,
+                                                        G_PARAM_EXPLICIT_NOTIFY | G_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class,
+                                   PROP_Y,
+                                   g_param_spec_double ("y",
+                                                        "Y",
+                                                        "Y co-ordinate of top-left corner of the crop 
rectangle",
+                                                        0.0,
+                                                        G_MAXDOUBLE,
+                                                        0.0,
+                                                        G_PARAM_EXPLICIT_NOTIFY | G_PARAM_READWRITE));
+
+}
+
+
+PhotosToolCropHelper *
+photos_tool_crop_helper_new (void)
+{
+  return g_object_new (PHOTOS_TYPE_TOOL_CROP_HELPER, NULL);
+}
+
+
+gdouble
+photos_tool_crop_helper_get_height (PhotosToolCropHelper *self)
+{
+  g_return_val_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self), 0.0);
+  return self->height;
+}
+
+
+gdouble
+photos_tool_crop_helper_get_width (PhotosToolCropHelper *self)
+{
+  g_return_val_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self), 0.0);
+  return self->width;
+}
+
+
+gdouble
+photos_tool_crop_helper_get_x (PhotosToolCropHelper *self)
+{
+  g_return_val_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self), 0.0);
+  return self->x;
+}
+
+
+gdouble
+photos_tool_crop_helper_get_y (PhotosToolCropHelper *self)
+{
+  g_return_val_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self), 0.0);
+  return self->y;
+}
+
+
+void
+photos_tool_crop_helper_set_height (PhotosToolCropHelper *self, gdouble height)
+{
+  g_return_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self));
+  g_return_if_fail (height >= 0.0);
+
+  if (photos_utils_equal_double (self->height, height))
+    goto out;
+
+  self->height = height;
+  g_object_notify (G_OBJECT (self), "height");
+
+ out:
+  return;
+}
+
+
+void
+photos_tool_crop_helper_set_width (PhotosToolCropHelper *self, gdouble width)
+{
+  g_return_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self));
+  g_return_if_fail (width >= 0.0);
+
+  if (photos_utils_equal_double (self->width, width))
+    goto out;
+
+  self->width = width;
+  g_object_notify (G_OBJECT (self), "width");
+
+ out:
+  return;
+}
+
+
+void
+photos_tool_crop_helper_set_x (PhotosToolCropHelper *self, gdouble x)
+{
+  g_return_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self));
+  g_return_if_fail (x >= 0.0);
+
+  if (photos_utils_equal_double (self->x, x))
+    goto out;
+
+  self->x = x;
+  g_object_notify (G_OBJECT (self), "x");
+
+ out:
+  return;
+}
+
+
+void
+photos_tool_crop_helper_set_y (PhotosToolCropHelper *self, gdouble y)
+{
+  g_return_if_fail (PHOTOS_IS_TOOL_CROP_HELPER (self));
+  g_return_if_fail (y >= 0.0);
+
+  if (photos_utils_equal_double (self->y, y))
+    goto out;
+
+  self->y = y;
+  g_object_notify (G_OBJECT (self), "y");
+
+ out:
+  return;
+}
diff --git a/src/photos-tool-crop-helper.h b/src/photos-tool-crop-helper.h
new file mode 100644
index 00000000..41a44729
--- /dev/null
+++ b/src/photos-tool-crop-helper.h
@@ -0,0 +1,52 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2018 Red Hat, Inc.
+ * Copyright © 2017 Umang Jain
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef PHOTOS_TOOL_CROP_HELPER_H
+#define PHOTOS_TOOL_CROP_HELPER_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_TOOL_CROP_HELPER (photos_tool_crop_helper_get_type ())
+G_DECLARE_FINAL_TYPE (PhotosToolCropHelper, photos_tool_crop_helper, PHOTOS, TOOL_CROP_HELPER, GObject);
+
+PhotosToolCropHelper     *photos_tool_crop_helper_new                 (void);
+
+gdouble                   photos_tool_crop_helper_get_height          (PhotosToolCropHelper *self);
+
+gdouble                   photos_tool_crop_helper_get_width           (PhotosToolCropHelper *self);
+
+gdouble                   photos_tool_crop_helper_get_x               (PhotosToolCropHelper *self);
+
+gdouble                   photos_tool_crop_helper_get_y               (PhotosToolCropHelper *self);
+
+void                      photos_tool_crop_helper_set_height          (PhotosToolCropHelper *self, gdouble 
height);
+
+void                      photos_tool_crop_helper_set_width           (PhotosToolCropHelper *self, gdouble 
width);
+
+void                      photos_tool_crop_helper_set_x               (PhotosToolCropHelper *self, gdouble 
x);
+
+void                      photos_tool_crop_helper_set_y               (PhotosToolCropHelper *self, gdouble 
y);
+
+G_END_DECLS
+
+#endif /* PHOTOS_TOOL_CROP_HELPER_H */