210125/gtk.i.6

   1 typedef struct _GList GList;
   2 typedef struct _GdkRectangle GdkRectangle;
   3 struct _GdkRectangle {
   4         int x;
   5         int y;
   6         int width;
   7         int height;
   8 };
   9 typedef enum {
  10         GTK_PACK_START, GTK_PACK_END
  11 } GtkPathType;
  12 typedef enum {
  13         GTK_POS_LEFT, GTK_POS_RIGHT, GTK_POS_TOP, GTK_POS_BOTTOM
  14 } GtkPreviewType;
  15 typedef struct _GtkWidget GtkWidget;
  16 typedef struct _GtkRequisition GtkRequisition;
  17 typedef GdkRectangle GtkAllocation;
  18 struct _GtkRequisition {
  19         int width;
  20         int height;
  21 };
  22 struct _GtkWidget {
  23         GtkWidget *parent;
  24 };
  25 typedef struct _GtkNotebook GtkNotebook;
  26 typedef struct _GtkNotebookPage GtkNotebookPage;
  27 struct _GtkNotebook {
  28         GtkNotebookPage *cur_page;
  29         unsigned int homogeneous:1;
  30 };
  31 typedef enum {
  32         DRAG_OPERATION_NONE, DRAG_OPERATION_REORDER, DRAG_OPERATION_DETACH
  33 } GtkNotebookDragOperation;
  34 struct _GtkNotebookPage {
  35         GtkWidget *tab_label;
  36         unsigned int pack:1;
  37         GtkRequisition requisition;
  38         GtkAllocation allocation;
  39 };
  40 typedef struct _GtkNotebookPrivate GtkNotebookPrivate;
  41 struct _GtkNotebookPrivate {
  42         GtkNotebookDragOperation operation;
  43         int drag_window_x;
  44         int drag_window_y;
  45         GtkNotebookPage *detached_tab;
  46 };
  47 int gtk_notebook_calculate_tabs_allocation(GtkNotebook * notebook,
  48                                            GList ** children,
  49                                            GList * last_child, int showarrow,
  50                                            int direction, int *remaining_space,
  51                                            int *expanded_tabs, int min, int max)
  52 {
  53         GtkNotebookPrivate *priv;
  54         GtkNotebookPage *page;
  55         int allocate_at_bottom;
  56         int tab_overlap;
  57         int tab_pos;
  58         int tab_extra_space;
  59         int left_x;
  60         int right_x;
  61         int top_y;
  62         int anchor;
  63         int xthickness;
  64         int ythickness;
  65         int gap_left;
  66         int packing_changed;
  67         GtkAllocation child_allocation;
  68         while (*children && *children != last_child) {
  69                 if (!
  70                     (((GtkNotebookPage *) (page))->tab_label->parent ==
  71                      ((GtkWidget *) (notebook))))
  72                         continue;
  73                 if (*expanded_tabs && (notebook->homogeneous)) {
  74                         tab_extra_space = *remaining_space / *expanded_tabs;
  75                         *remaining_space -= tab_extra_space;
  76                 }
  77                 switch (tab_pos) {
  78                 case GTK_POS_TOP:
  79                 case GTK_POS_BOTTOM:
  80                         child_allocation.width =
  81                             page->requisition.width + tab_overlap +
  82                             tab_extra_space;
  83                         if (!gap_left && packing_changed) {
  84                                 if (!allocate_at_bottom) {
  85                                         if (1) {
  86                                                 left_x = priv->drag_window_x =
  87                                                     anchor;
  88                                                 anchor +=
  89                                                     notebook->cur_page->
  90                                                     allocation.width -
  91                                                     tab_overlap;
  92                                         }
  93                                         if ((notebook->cur_page->pack ==
  94                                              GTK_PACK_END
  95                                              && right_x > anchor)) {
  96                                                 anchor -=
  97                                                     notebook->cur_page->
  98                                                     allocation.width;
  99                                                 left_x = priv->drag_window_x =
 100                                                     anchor;
 101                                         }
 102                                 }
 103                         } else {
 104                                 if (allocate_at_bottom)
 105                                         anchor -= child_allocation.width;
 106                                 if (priv->operation == DRAG_OPERATION_REORDER
 107                                     && page->pack == notebook->cur_page->pack) {
 108                                         if (!allocate_at_bottom
 109                                             && left_x >= anchor
 110                                             && left_x <=
 111                                             anchor + child_allocation.width / 2)
 112                                                 anchor +=
 113                                                     notebook->cur_page->
 114                                                     allocation.width -
 115                                                     tab_overlap;
 116                                         else if (allocate_at_bottom
 117                                                  && right_x >=
 118                                                  anchor +
 119                                                  child_allocation.width / 2
 120                                                  && right_x <=
 121                                                  anchor +
 122                                                  child_allocation.width)
 123                                                 anchor -=
 124                                                     notebook->cur_page->
 125                                                     allocation.width -
 126                                                     tab_overlap;
 127                                 }
 128                                 child_allocation.x = anchor;
 129                         }
 130                         break;
 131                 case GTK_POS_LEFT:
 132                 case GTK_POS_RIGHT:
 133                         child_allocation.height =
 134                             page->requisition.height + tab_overlap +
 135                             tab_extra_space;
 136                         if (packing_changed) {
 137                                 priv->drag_window_x = child_allocation.x;
 138                                 priv->drag_window_y = top_y;
 139                                 if (priv->operation == DRAG_OPERATION_REORDER
 140                                     && page->pack == notebook->cur_page->pack) {
 141                                         if (!allocate_at_bottom
 142                                             && top_y >= anchor
 143                                             && top_y <=
 144                                             anchor +
 145                                             child_allocation.height / 2)
 146                                                 anchor +=
 147                                                     notebook->cur_page->
 148                                                     allocation.height -
 149                                                     tab_overlap;
 150                                 }
 151                         }
 152                 }
 153                 if ((page == priv->detached_tab
 154                      && priv->operation == DRAG_OPERATION_DETACH)
 155                     || (page == notebook->cur_page
 156                         && priv->operation == DRAG_OPERATION_REORDER)) {
 157                         page->allocation.x = 0;
 158                 }
 159                 if (page != notebook->cur_page) {
 160                         switch (tab_pos) {
 161                         case GTK_POS_TOP:
 162                                 page->allocation.y += ythickness;
 163                         case GTK_POS_BOTTOM:
 164                                 page->allocation.height =
 165                                     (((1) >
 166                                       (page->allocation.height -
 167                                        ythickness)) ? (1) : (page->allocation.
 168                                                              height -
 169                                                              ythickness));
 170                                 break;
 171                         case GTK_POS_LEFT:
 172                                 page->allocation.x += xthickness;
 173                         case GTK_POS_RIGHT:
 174                                 page->allocation.width =
 175                                     (((1) >
 176                                       (page->allocation.width -
 177                                        xthickness)) ? (1) : (page->allocation.
 178                                                              width -
 179                                                              xthickness));
 180                         }
 181                 }
 182                 switch (tab_pos) {
 183                 case GTK_POS_TOP:
 184                 case GTK_POS_BOTTOM:
 185                         if (priv->operation != DRAG_OPERATION_REORDER
 186                             || (priv->operation == DRAG_OPERATION_REORDER
 187                                 && page != notebook->cur_page))
 188                                 if (!allocate_at_bottom)
 189                                         anchor +=
 190                                             child_allocation.width -
 191                                             tab_overlap;
 192                 case GTK_POS_LEFT:
 193                 case GTK_POS_RIGHT:
 194                         if (priv->operation != DRAG_OPERATION_REORDER
 195                             || (priv->operation == DRAG_OPERATION_REORDER
 196                                 && page != notebook->cur_page))
 197                                 if (priv->operation == DRAG_OPERATION_REORDER)
 198                                         if (page->pack ==
 199                                             notebook->cur_page->pack
 200                                             && !allocate_at_bottom
 201                                             && top_y >=
 202                                             anchor + child_allocation.height / 2
 203                                             && top_y <=
 204                                             anchor + child_allocation.height)
 205                                                 anchor +=
 206                                                     notebook->cur_page->
 207                                                     allocation.height -
 208                                                     tab_overlap;
 209                 }
 210                 if (page->tab_label)
 211                         IA__gtk_widget_set_child_visible(page->tab_label,
 212                                                          (!(0)));
 213         }
 214 }