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awesome/objects/widgets/textbox.c

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/*
* textbox.c - text box widget
*
* Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
*
* 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 "objects/widget.h"
#include "luaa.h"
/** Padding type */
typedef struct
{
/** Padding at top */
int top;
/** Padding at bottom */
int bottom;
/** Padding at left */
int left;
/** Padding at right */
int right;
} padding_t;
/** The textbox private data structure */
typedef struct
{
/** The actual text the textbox is set to */
char *text;
/** The length of text */
size_t text_len;
draw_text_context_t data;
/** Textbox width and height */
int width, height;
/** Extents */
area_t extents;
PangoEllipsizeMode ellip;
PangoWrapMode wrap;
/** Border */
struct
{
int width;
color_t color;
} border;
/** Text alignment */
alignment_t align, valign;
/** Margin */
padding_t margin;
/** Background color */
color_t bg;
/** Background image */
image_t *bg_image;
/** Background resize to wibox height. */
bool bg_resize;
/** Background alignment */
alignment_t bg_align;
} textbox_data_t;
/** Get an optional padding table from a Lua table.
* \param L The Lua VM state.
* \param idx The table index on the stack.
* \param dpadding The default padding value to use.
*/
static inline padding_t
luaA_getopt_padding(lua_State *L, int idx, padding_t *dpadding)
{
padding_t padding;
luaA_checktable(L, idx);
padding.right = luaA_getopt_number(L, idx, "right", dpadding->right);
padding.left = luaA_getopt_number(L, idx, "left", dpadding->left);
padding.top = luaA_getopt_number(L, idx, "top", dpadding->top);
padding.bottom = luaA_getopt_number(L, idx, "bottom", dpadding->bottom);
return padding;
}
/** Push a padding structure into a table on the Lua stack.
* \param L The Lua VM state.
* \param padding The padding struct pointer.
* \return The number of elements pushed on stack.
*/
static inline int
luaA_pushpadding(lua_State *L, padding_t *padding)
{
lua_createtable(L, 0, 4);
lua_pushnumber(L, padding->right);
lua_setfield(L, -2, "right");
lua_pushnumber(L, padding->left);
lua_setfield(L, -2, "left");
lua_pushnumber(L, padding->top);
lua_setfield(L, -2, "top");
lua_pushnumber(L, padding->bottom);
lua_setfield(L, -2, "bottom");
return 1;
}
static area_t
textbox_extents(lua_State *L, widget_t *widget)
{
textbox_data_t *d = widget->data;
area_t geometry = d->extents;
geometry.width += d->margin.left + d->margin.left;
geometry.height += d->margin.bottom + d->margin.top;
if(d->width)
geometry.width = d->width;
if(d->height)
geometry.width = d->height;
if(d->bg_image)
{
int bgi_height = image_getheight(d->bg_image);
int bgi_width = image_getwidth(d->bg_image);
double ratio = d->bg_resize ? (double) geometry.height / bgi_height : 1;
geometry.width = MAX(d->extents.width + d->margin.left + d->margin.right, MAX(d->width, bgi_width * ratio));
}
geometry.x = geometry.y = 0;
return geometry;
}
/** Draw a textbox widget.
* \param widget The widget.
* \param ctx The draw context.
* \param p A pointer to the object we're draw onto.
*/
static void
textbox_draw(widget_t *widget, draw_context_t *ctx, area_t geometry, wibox_t *p)
{
textbox_data_t *d = widget->data;
if(d->bg.initialized)
draw_rectangle(ctx, geometry, 1.0, true, &d->bg);
if(d->border.width > 0)
draw_rectangle(ctx, geometry, d->border.width, false, &d->border.color);
if(d->bg_image)
{
int bgi_height = image_getheight(d->bg_image);
int bgi_width = image_getwidth(d->bg_image);
double ratio = d->bg_resize ? (double) geometry.height / bgi_height : 1;
/* check there is enough space to draw the image */
if(ratio * bgi_width <= geometry.width)
{
int x = geometry.x;
int y = geometry.y;
switch(d->bg_align)
{
case AlignCenter:
x += (geometry.width - bgi_width * ratio) / 2;
break;
case AlignRight:
x += geometry.width - bgi_width * ratio;
break;
case AlignBottom:
y += geometry.height - bgi_height * ratio;
break;
case AlignMiddle:
y += (geometry.height - bgi_height * ratio) / 2;
break;
default:
break;
}
draw_image(ctx, x, y, ratio, d->bg_image);
}
}
geometry.x += d->margin.left;
geometry.y += d->margin.top;
int margin_width = d->margin.left + d->margin.right;
if(margin_width <= geometry.width)
geometry.width -= d->margin.left + d->margin.right;
else
geometry.width = 0;
int margin_height = d->margin.top + d->margin.bottom;
if(margin_height <= geometry.height)
geometry.height -= d->margin.top + d->margin.bottom;
else
geometry.height = 0;
draw_text(ctx, &d->data, d->ellip, d->wrap, d->align, d->valign, geometry);
}
/** Delete a textbox widget.
* \param w The widget to destroy.
*/
static void
textbox_destructor(widget_t *w)
{
textbox_data_t *d = w->data;
draw_text_context_wipe(&d->data);
p_delete(&d->text);
p_delete(&d);
}
static int
luaA_textbox_margin(lua_State *L)
{
widget_t *widget = luaA_checkudata(L, 1, &widget_class);
textbox_data_t *d = widget->data;
if(lua_gettop(L) == 2)
{
d->margin = luaA_getopt_padding(L, 2, &d->margin);
widget_invalidate_bywidget(widget);
}
return luaA_pushpadding(L, &d->margin);
}
/** Textbox widget.
* \param L The Lua VM state.
* \param prop The property's name.
* \return The number of elements pushed on stack.
* \luastack
* \lfield text The text to display.
* \lfield width The width of the textbox. Set to 0 for auto.
* \lfield wrap The wrap mode: word, char, word_char.
* \lfield ellipsize The ellipsize mode: start, middle or end.
* \lfield border_width The border width to draw around.
* \lfield border_color The border color.
* \lfield align Text alignment, left, center or right.
* \lfield margin Method to pass text margin: a table with top, left, right and bottom keys.
* \lfield bg Background color.
* \lfield bg_image Background image.
* \lfield bg_align Background image alignment, left, center, right, bottom, top or middle
* \lfield bg_resize Background resize.
*/
static int
luaA_textbox_index(lua_State *L, const char *prop)
{
widget_t *widget = luaA_checkudata(L, 1, &widget_class);
textbox_data_t *d = widget->data;
if(a_strcmp(prop, "bg_resize") == 0)
lua_pushboolean(L, d->bg_resize);
else if(a_strcmp(prop, "bg_align") == 0)
lua_pushstring(L, draw_align_tostr(d->bg_align));
else if(a_strcmp(prop, "bg_image") == 0)
return luaA_object_push(L, d->bg_image);
else if(a_strcmp(prop, "bg") == 0)
return luaA_pushcolor(L, &d->bg);
else if(a_strcmp(prop, "margin") == 0)
lua_pushcfunction(L, luaA_textbox_margin);
else if(a_strcmp(prop, "align") == 0)
lua_pushstring(L, draw_align_tostr(d->align));
else if(a_strcmp(prop, "valign") == 0)
lua_pushstring(L, draw_align_tostr(d->valign));
else if(a_strcmp(prop, "border_width") == 0)
lua_pushnumber(L, d->border.width);
else if(a_strcmp(prop, "border_color") == 0)
luaA_pushcolor(L, &d->border.color);
else if(a_strcmp(prop, "text") == 0)
{
if(d->text_len > 0)
{
lua_pushlstring(L, d->text, d->text_len);
return 1;
}
return 0;
}
else if(a_strcmp(prop, "width") == 0)
lua_pushnumber(L, d->width);
else if(a_strcmp(prop, "height") == 0)
lua_pushnumber(L, d->height);
else if(a_strcmp(prop, "wrap") == 0)
switch(d->wrap)
{
default:
lua_pushliteral(L, "word");
break;
case PANGO_WRAP_CHAR:
lua_pushliteral(L, "char");
break;
case PANGO_WRAP_WORD_CHAR:
lua_pushliteral(L, "word_char");
break;
}
else if(a_strcmp(prop, "ellipsize") == 0)
switch(d->ellip)
{
case PANGO_ELLIPSIZE_START:
lua_pushliteral(L, "start");
break;
case PANGO_ELLIPSIZE_MIDDLE:
lua_pushliteral(L, "middle");
break;
default:
lua_pushliteral(L, "end");
break;
}
else
return 0;
return 1;
}
/** The __newindex method for a textbox object.
* \param L The Lua VM state.
* \param token The key token.
* \return The number of elements pushed on stack.
*/
static int
luaA_textbox_newindex(lua_State *L, const char *prop)
{
size_t len = 0;
widget_t *widget = luaA_checkudata(L, 1, &widget_class);
const char *buf = NULL;
textbox_data_t *d = widget->data;
if(a_strcmp(prop, "bg_align") == 0)
{
buf = luaL_checkstring(L, 3);
d->bg_align = draw_align_fromstr(buf);
}
else if(a_strcmp(prop, "bg_resize") == 0)
d->bg_resize = luaA_checkboolean(L, 3);
else if(a_strcmp(prop, "bg_image") == 0)
{
luaA_checkudataornil(L, -1, &image_class);
luaA_object_unref_item(L, 1, d->bg_image);
d->bg_image = luaA_object_ref_item(L, 1, 3);
}
else if(a_strcmp(prop, "bg") == 0)
{
if(lua_isnil(L, 3))
p_clear(&d->bg, 1);
else if((buf = luaL_checklstring(L, 3, &len)))
color_init_reply(color_init_unchecked(&d->bg, buf, len));
}
else if(a_strcmp(prop, "align") == 0)
{
if((buf = luaL_checkstring(L, 3)))
d->align = draw_align_fromstr(buf);
}
else if(a_strcmp(prop, "valign") == 0)
{
if((buf = luaL_checkstring(L, 3)))
d->valign = draw_align_fromstr(buf);
}
else if(a_strcmp(prop, "border_color") == 0)
{
if((buf = luaL_checklstring(L, 3, &len)))
color_init_reply(color_init_unchecked(&d->border.color, buf, len));
}
else if(a_strcmp(prop, "border_width") == 0)
d->border.width = luaL_checknumber(L, 3);
else if(a_strcmp(prop, "text") == 0)
{
if(lua_isnil(L, 3)
|| (buf = luaL_checklstring(L, 3, &len)))
{
/* delete */
draw_text_context_wipe(&d->data);
p_delete(&d->text);
d->text_len = 0;
p_clear(&d->data, 1);
if(buf)
{
char *text;
ssize_t tlen;
bool success;
/* if text has been converted to UTF-8 */
if(draw_iso2utf8(buf, len, &text, &tlen))
{
success = draw_text_context_init(&d->data, text, tlen);
if(success)
{
d->text = p_dup(text, tlen);
d->text_len = tlen;
}
p_delete(&text);
}
else
{
success = draw_text_context_init(&d->data, buf, len);
if(success)
{
d->text = p_dup(buf, len);
d->text_len = len;
}
}
d->extents = draw_text_extents(&d->data);
if(!success)
luaL_error(L, "Invalid markup in '%s'", buf);
}
else
p_clear(&d->extents, 1);
}
}
else if(a_strcmp(prop, "width") == 0)
d->width = luaL_checknumber(L, 3);
else if(a_strcmp(prop, "height") == 0)
d->height = luaL_checknumber(L, 3);
else if(a_strcmp(prop, "wrap") == 0)
{
if((buf = luaL_checkstring(L, 3)))
{
if(a_strcmp(buf, "word") == 0)
d->wrap = PANGO_WRAP_WORD;
else if(a_strcmp(buf, "char") == 0)
d->wrap = PANGO_WRAP_CHAR;
else if(a_strcmp(buf, "word_char") == 0)
d->wrap = PANGO_WRAP_WORD_CHAR;
}
}
else if(a_strcmp(prop, "ellipsize") == 0)
{
if((buf = luaL_checkstring(L, 3)))
{
if(a_strcmp(buf, "start") == 0)
d->ellip = PANGO_ELLIPSIZE_START;
else if(a_strcmp(buf, "middle") == 0)
d->ellip = PANGO_ELLIPSIZE_MIDDLE;
else if(a_strcmp(buf, "end") == 0)
d->ellip = PANGO_ELLIPSIZE_END;
}
}
else
return 0;
widget_invalidate_bywidget(widget);
return 0;
}
/** Create a new textbox widget.
* \param w The widget to initialize.
* \return A brand new widget.
*/
widget_t *
widget_textbox(widget_t *w)
{
w->draw = textbox_draw;
w->index = luaA_textbox_index;
w->newindex = luaA_textbox_newindex;
w->destructor = textbox_destructor;
w->extents = textbox_extents;
textbox_data_t *d = w->data = p_new(textbox_data_t, 1);
d->ellip = PANGO_ELLIPSIZE_END;
d->valign = AlignCenter;
return w;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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