widgets/textbox.c

   1 /*
   2  * textbox.c - text box widget
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "widget.h"
  23 #include "common/tokenize.h"
  24
  25 extern awesome_t globalconf;
  26
  27 /** The textbox private data structure */
  28 typedef struct
  29 {
  30     /** Textbox text */
  31     char *text;
  32     /** Textbox text length */
  33     size_t len;
  34     /** Textbox width */
  35     int width;
  36     /** Extents */
  37     int extents;
  38     /** Draw parser data */
  39     draw_parser_data_t pdata;
  40 } textbox_data_t;
  41
  42 static area_t
  43 textbox_geometry(widget_t *widget, int screen, int height, int width)
  44 {
  45     area_t geometry;
  46     textbox_data_t *d = widget->data;
  47
  48     geometry.height = height;
  49
  50     if(d->width)
  51         geometry.width = d->width;
  52     else if(widget->align == AlignFlex)
  53         geometry.width = width;
  54     else
  55     {
  56         geometry.width = MIN(d->extents, width);
  57
  58         if(d->pdata.bg_image)
  59             geometry.width = MAX(geometry.width,
  60                                  d->pdata.bg_resize ? ((double) d->pdata.bg_image->width / (double) d->pdata.bg_image->height) * geometry.height : d->pdata.bg_image->width);
  61     }
  62
  63     return geometry;
  64 }
  65
  66 /** Draw a textbox widget.
  67  * \param widget The widget.
  68  * \param ctx The draw context.
  69  * \param screen The screen.
  70  * \param p A pointer to the object we're draw onto.
  71  */
  72 static void
  73 textbox_draw(widget_t *widget, draw_context_t *ctx, area_t geometry,
  74              int screen, wibox_t *p)
  75 {
  76     textbox_data_t *d = widget->data;
  77     draw_text(ctx, globalconf.font, geometry, d->text, d->len, &d->pdata);
  78 }
  79
  80 /** Delete a textbox widget.
  81  * \param w The widget to destroy.
  82  */
  83 static void
  84 textbox_destructor(widget_t *w)
  85 {
  86     textbox_data_t *d = w->data;
  87     draw_parser_data_wipe(&d->pdata);
  88     p_delete(&d->text);
  89     p_delete(&d);
  90 }
  91
  92 /** Textbox widget.
  93  * \param L The Lua VM state.
  94  * \param token The key token.
  95  * \return The number of elements pushed on stack.
  96  * \luastack
  97  * \lfield text The text to display.
  98  * \lfield width The width of the textbox. Set to 0 for auto.
  99  */
 100 static int
 101 luaA_textbox_index(lua_State *L, awesome_token_t token)
 102 {
 103     widget_t **widget = luaA_checkudata(L, 1, "widget");
 104     textbox_data_t *d = (*widget)->data;
 105
 106     switch(token)
 107     {
 108       case A_TK_TEXT:
 109         lua_pushstring(L, d->text);
 110         return 1;
 111       case A_TK_WIDTH:
 112         lua_pushnumber(L, d->width);
 113         return 1;
 114       default:
 115         return 0;
 116     }
 117 }
 118
 119 /** The __newindex method for a textbox object.
 120  * \param L The Lua VM state.
 121  * \param token The key token.
 122  * \return The number of elements pushed on stack.
 123  */
 124 static int
 125 luaA_textbox_newindex(lua_State *L, awesome_token_t token)
 126 {
 127     size_t len = 0;
 128     widget_t **widget = luaA_checkudata(L, 1, "widget");
 129     const char *buf = NULL;
 130     textbox_data_t *d = (*widget)->data;
 131
 132     switch(token)
 133     {
 134       case A_TK_TEXT:
 135         if(lua_isnil(L, 3)
 136            || (buf = luaL_checklstring(L, 3, &len)))
 137         {
 138             /* delete */
 139             draw_parser_data_wipe(&d->pdata);
 140             /* reinit since we are giving it as arg to draw_text unconditionally */
 141             draw_parser_data_init(&d->pdata);
 142             p_delete(&d->text);
 143
 144             /* re-init */
 145             d->len = len;
 146             if(buf)
 147             {
 148                 a_iso2utf8(&d->text, buf, len);
 149                 d->extents = draw_text_extents(globalconf.default_screen,
 150                                                globalconf.font, d->text, d->len, &d->pdata).width;
 151             }
 152             else
 153                 d->extents = 0;
 154         }
 155         break;
 156       case A_TK_WIDTH:
 157         d->width = luaL_checknumber(L, 3);
 158         break;
 159       default:
 160         return 0;
 161     }
 162
 163     widget_invalidate_bywidget(*widget);
 164
 165     return 0;
 166 }
 167
 168 /** Create a new textbox widget.
 169  * \param align Widget alignment.
 170  * \return A brand new widget.
 171  */
 172 widget_t *
 173 textbox_new(alignment_t align)
 174 {
 175     widget_t *w;
 176     textbox_data_t *d;
 177
 178     w = p_new(widget_t, 1);
 179     widget_common_new(w);
 180     w->align = align;
 181     w->align_supported |= AlignFlex;
 182     w->draw = textbox_draw;
 183     w->index = luaA_textbox_index;
 184     w->newindex = luaA_textbox_newindex;
 185     w->destructor = textbox_destructor;
 186     w->geometry = textbox_geometry;
 187     w->data = d = p_new(textbox_data_t, 1);
 188
 189     return w;
 190 }
 191
 192 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80