Mercurial > MadButterfly

annotate src/shape_text.c @ 670:f0b4fbcd1c51

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Support encapsulated method & function return Handle<Value> directly
author Thinker K.F. Li <thinker@branda.to>
date Thu, 05 Aug 2010 17:42:36 +0800
parents ba64f928542b
children 586e50f82c1f
rev   line source
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diff changeset
1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <math.h>
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5 #include "mb_graph_engine.h"
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6 #include <pango/pangocairo.h>
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7 #include "mb_types.h"
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8 #include "mb_shapes.h"
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9
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10 #define ASSERT(x)
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11 #define OK 0
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12 #define ERR -1
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13
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14 typedef struct _sh_text {
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15 shape_t shape;
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16 char *data;
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17 co_aix x, y,w,h;
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18 co_aix d_x, d_y; /* device x and y */
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19 co_aix font_size;
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20 co_aix d_font_size;
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21 mbe_font_face_t *face;
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22 mbe_scaled_font_t *scaled_font;
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23 int flags;
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24 PangoLayout *layout;
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25 int align;
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26 PangoAttrList *attrs;
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27 } sh_text_t;
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28
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29 #define TXF_SCALE_DIRTY 0x1
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30
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31 static void sh_text_free(shape_t *shape) {
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32 sh_text_t *text = (sh_text_t *)shape;
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33
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34 if(text->scaled_font)
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35 mbe_scaled_font_destroy(text->scaled_font);
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36 mbe_font_face_destroy(text->face);
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37 }
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38
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39 static void sh_text_P_generate_layout(sh_text_t *text,mbe_t *cr);
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40 shape_t *rdman_shape_text_new(redraw_man_t *rdman,
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41 const char *txt, co_aix x, co_aix y,
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42 co_aix font_size, mbe_font_face_t *face,PangoAttrList *attrs) {
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43 sh_text_t *text;
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44
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45 text = (sh_text_t *)malloc(sizeof(sh_text_t));
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46 if(text == NULL)
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47 return NULL;
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48
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49 memset(text, 0, sizeof(sh_text_t));
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50 mb_obj_init(text, MBO_TEXT);
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51 text->data = strdup(txt);
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52 if(text->data == NULL) {
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53 free(text);
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54 return NULL;
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55 }
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56 text->x = x;
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57 text->y = y;
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58 text->font_size = font_size;
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59 mbe_font_face_reference(face);
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60 text->face = face;
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61 text->flags |= TXF_SCALE_DIRTY;
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62
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63 text->shape.free = sh_text_free;
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64 text->layout = NULL;
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65 text->attrs = attrs;
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66 text->align = TEXTALIGN_START;
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67 text->w = text->h = 0;
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69 rdman_shape_man(rdman, (shape_t *)text);
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70
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71 return (shape_t *)text;
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72 }
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74 void sh_text_set_pos(shape_t *shape, co_aix x, co_aix y)
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75 {
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76 sh_text_t *text = (sh_text_t *)shape;
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77 text->x = x;
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78 text->y = y;
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79 }
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80
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81
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82 void sh_text_get_pos(shape_t *shape, co_aix *x, co_aix *y)
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83 {
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84 sh_text_t *text = (sh_text_t *)shape;
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85 *x = text->x;
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86 *y = text->y;
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87 }
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88
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89 void sh_text_get_text(shape_t *shape, char *text,int size)
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90 {
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91 sh_text_t *t = (sh_text_t *)shape;
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92 strncpy(text,t->data, size);
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93 }
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94
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95 void sh_text_set_text(shape_t *shape, const char *txt) {
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96 sh_text_t *text = (sh_text_t *)shape;
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97 char *buf;
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98
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99 buf = strdup(txt);
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100 if(text->data) free(text->data);
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101 text->data = buf;
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102 }
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103
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104 void sh_text_set_color(shape_t *shape, unsigned int color)
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105 {
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106 PangoAttribute *attr = pango_attr_foreground_new(TEXTCOLOR_RED(color)<<8,TEXTCOLOR_GREEN(color)<<8,TEXTCOLOR_BLUE(color)<<8);
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107 sh_text_t *text = (sh_text_t *)shape;
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108 attr->start_index = 0;
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109 attr->end_index = -1;
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110 pango_attr_list_change(text->attrs, attr);
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111 }
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112 void sh_text_set_bold(shape_t *shape,int bold)
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113 {
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114 PangoAttribute *attr = pango_attr_weight_new(bold? PANGO_WEIGHT_BOLD:PANGO_WEIGHT_NORMAL);
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115 sh_text_t *text = (sh_text_t *)shape;
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116 attr->start_index = 0;
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117 attr->end_index = -1;
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118 pango_attr_list_change(text->attrs, attr);
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119 }
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120 void sh_text_set_italic(shape_t *shape,int italic)
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121 {
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122 PangoAttribute *attr = pango_attr_style_new(italic? PANGO_STYLE_ITALIC:PANGO_STYLE_NORMAL);
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123 sh_text_t *text = (sh_text_t *)shape;
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124 attr->start_index = 0;
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125 attr->end_index = -1;
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126 pango_attr_list_change(text->attrs, attr);
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127 }
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128 void sh_text_set_underline(shape_t *shape,int underline)
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129 {
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130 PangoAttribute *attr = pango_attr_underline_new(underline? PANGO_UNDERLINE_SINGLE:PANGO_UNDERLINE_NONE);
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131 sh_text_t *text = (sh_text_t *)shape;
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132 attr->start_index = 0;
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133 attr->end_index = -1;
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134 pango_attr_list_change(text->attrs, attr);
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135 }
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136 void sh_text_set_font(shape_t *shape,char *family)
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137 {
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138 PangoAttribute *attr = pango_attr_family_new(family);
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139 sh_text_t *text = (sh_text_t *)shape;
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140 attr->start_index = 0;
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141 attr->end_index = -1;
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142 pango_attr_list_change(text->attrs, attr);
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143 }
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144
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145 void sh_text_set_align(shape_t *shape,int align)
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146 {
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147 sh_text_t *text = (sh_text_t *)shape;
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diff changeset
148 text->align = align;
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diff changeset
149 }
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parents: 448
diff changeset
150 void sh_text_set_width(shape_t *shape,int width)
61a0bceb369d Add alignment support for the text layout
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parents: 448
diff changeset
151 {
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diff changeset
152 sh_text_t *text = (sh_text_t *)shape;
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parents: 448
diff changeset
153 text->w = width;
61a0bceb369d Add alignment support for the text layout
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parents: 448
diff changeset
154 }
291
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
155 void sh_text_set_style(shape_t *shape,int begin,int end,mb_textstyle_t *format)
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
parents: 289
diff changeset
156 {
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
157 PangoAttribute *attr;
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
158 sh_text_t *text = (sh_text_t *)shape;
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
parents: 289
diff changeset
159
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
160 if (end == -1) {
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
parents: 289
diff changeset
161 end = strlen(text->data);
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
162 } else
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
163 end++;
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diff changeset
164 if (format->property & TEXTSTYLE_BOLD) {
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
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diff changeset
165 attr = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
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diff changeset
166 attr->start_index = begin;
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
167 attr->end_index = end;
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
168 pango_attr_list_change(text->attrs,attr);
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
169 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
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diff changeset
170 if (format->property & TEXTSTYLE_ITALIC) {
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
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diff changeset
171 attr = pango_attr_style_new(PANGO_STYLE_ITALIC);
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diff changeset
172 attr->start_index = begin;
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diff changeset
173 attr->end_index = end;
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diff changeset
174 pango_attr_list_change(text->attrs,attr);
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
175 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
176 if (format->property & TEXTSTYLE_UNDERLINE) {
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
177 attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
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178 attr->start_index = begin;
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diff changeset
179 attr->end_index = end;
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diff changeset
180 pango_attr_list_change(text->attrs,attr);
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diff changeset
181 }
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diff changeset
182 if (format->property & TEXTSTYLE_COLOR) {
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diff changeset
183 printf("color=%x\n", format->color);
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184 printf("red = %x\n",TEXTCOLOR_RED(format->color));
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185 printf("green = %x\n",TEXTCOLOR_GREEN(format->color));
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186 printf("blue = %x\n",TEXTCOLOR_BLUE(format->color));
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187 attr = pango_attr_foreground_new(TEXTCOLOR_RED(format->color)<<8,TEXTCOLOR_GREEN(format->color)<<8,TEXTCOLOR_BLUE(format->color)<<8);
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diff changeset
188 attr->start_index = begin;
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diff changeset
189 attr->end_index = end;
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diff changeset
190 pango_attr_list_change(text->attrs,attr);
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diff changeset
191 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
192 if (format->property & TEXTSTYLE_FONT) {
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diff changeset
193 attr = pango_attr_family_new(format->font);
137a73822d48 Add sh_text_set_style support to change the style of text element.
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diff changeset
194 attr->start_index = begin;
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diff changeset
195 attr->end_index = end;
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diff changeset
196 pango_attr_list_change(text->attrs,attr);
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
197 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
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diff changeset
198 if (format->property & TEXTSTYLE_ALIGN) {
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
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diff changeset
199 // We can have one align style for the whole text only
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parents: 289
diff changeset
200 if (begin != 0 || (end != strlen(text->data)-1))
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wycc
parents: 289
diff changeset
201 return;
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
202 text->align = format->align;
137a73822d48 Add sh_text_set_style support to change the style of text element.
wycc
parents: 289
diff changeset
203 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
204 }
137a73822d48 Add sh_text_set_style support to change the style of text element.
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parents: 289
diff changeset
205
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
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parents: 278
diff changeset
206 static int get_extents(sh_text_t *text, PangoRectangle *extents) {
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
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diff changeset
207 mbe_scaled_font_t *new_scaled;
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
208
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
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parents: 278
diff changeset
209 pango_layout_get_extents(text->layout, NULL, extents);
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
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parents: 278
diff changeset
210 pango_extents_to_pixels(extents,NULL);
27
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
211 return OK;
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
212 }
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
213
19c603dd6ff9 Add text shape.
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parents:
diff changeset
214 void sh_text_transform(shape_t *shape) {
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parents:
diff changeset
215 sh_text_t *text;
346
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
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parents: 330
diff changeset
216 coord_t *coord;
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
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parents: 330
diff changeset
217 canvas_t *canvas;
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
218 co_aix x, y;
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parents:
diff changeset
219 co_aix shw;
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
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diff changeset
220 PangoRectangle extents;
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
221 co_aix poses[2][2];
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parents:
diff changeset
222 int r;
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parents:
diff changeset
223
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parents:
diff changeset
224 text = (sh_text_t *)shape;
346
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
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parents: 330
diff changeset
225
31
da770188a44d resize font size for changige of coord.
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parents: 30
diff changeset
226 text->d_font_size = coord_trans_size(shape->coord, text->font_size);
346
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
Thinker K.F. Li <thinker@branda.to>
parents: 330
diff changeset
227
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
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parents: 330
diff changeset
228 coord = sh_get_coord(shape);
b391722bf20e sh_image_t::img_data is managed by paint_image_t.
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parents: 330
diff changeset
229 canvas = _coord_get_canvas(coord);
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
230 sh_text_P_generate_layout(text, (mbe_t *)canvas);
31
da770188a44d resize font size for changige of coord.
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parents: 30
diff changeset
231
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
232 x = text->x;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
233 y = text->y;
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parents:
diff changeset
234 coord_trans_pos(shape->coord, &x, &y);
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parents:
diff changeset
235 r = get_extents(text, &extents);
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
wycc
parents: 278
diff changeset
236
280
c8b6ca46950b Add merged result
wycc
parents: 279
diff changeset
237 //printf("x=%f y=%f text=%s ascent=%d,descent=%d,width=%d height=%d\n", x,y,text->data,PANGO_ASCENT(extents), PANGO_DESCENT(extents), extents.width, extents.height);
104
Thinker K.F. Li <thinker@branda.to>
parents: 88
diff changeset
238 ASSERT(r == OK);
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
239
285
248a40d51473 Check in test program for sh_text_set_text for debugging. It is not working yet.
wycc
parents: 280
diff changeset
240 text->d_x = x-5;
248a40d51473 Check in test program for sh_text_set_text for debugging. It is not working yet.
wycc
parents: 280
diff changeset
241 text->d_y = y-PANGO_DESCENT(extents)+5;
27
19c603dd6ff9 Add text shape.
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parents:
diff changeset
242 shw = shape->stroke_width / 2;
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parents:
diff changeset
243 /* FIXME: It is unreasonable that a font exceed it's bbox.
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
244 * We add 5 pixels in get right bbox. But, it is unreasonable.
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
245 */
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
wycc
parents: 278
diff changeset
246
289
13ce87b6dbf5 Fix bug of sh_text_t that do not update it-self after changes.
Thinker K.F. Li <thinker@branda.to>
parents: 285
diff changeset
247 poses[0][0] = text->d_x + extents.x - shw;
13ce87b6dbf5 Fix bug of sh_text_t that do not update it-self after changes.
Thinker K.F. Li <thinker@branda.to>
parents: 285
diff changeset
248 poses[0][1] = text->d_y + extents.y - shw;
285
248a40d51473 Check in test program for sh_text_set_text for debugging. It is not working yet.
wycc
parents: 280
diff changeset
249 poses[1][0] = poses[0][0] + extents.width + shape->stroke_width;
248a40d51473 Check in test program for sh_text_set_text for debugging. It is not working yet.
wycc
parents: 280
diff changeset
250 poses[1][1] = poses[0][1] + extents.height + shape->stroke_width;
27
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
251 geo_from_positions(shape->geo, 2, poses);
104
Thinker K.F. Li <thinker@branda.to>
parents: 88
diff changeset
252 /*! \todo Support ratation for shape_text. */
27
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
253 }
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
254
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
255 static void sh_text_P_generate_layout(sh_text_t *text,mbe_t *cr)
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
256 {
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
257 PangoAttribute *attr;
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
258 PangoAttrList *attrlist;
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
259 PangoFontDescription *desc;
27
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
260
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
261 if (text->layout) {
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
262 g_object_unref(text->layout);
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
263 }
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
264 text->layout = pango_cairo_create_layout(cr);
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
265 desc = pango_font_description_from_string("Sans Bold");
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
266 //mbe_set_source_rgb (cr, 0, 0, 0);
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
267 pango_layout_set_font_description (text->layout, desc);
461
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
268 if (text->w != 0)
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
269 pango_layout_set_width(text->layout, text->w);
279
86a5ae82ccf2 * Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser
wycc
parents: 278
diff changeset
270 pango_layout_set_text(text->layout,text->data,strlen(text->data));
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
271 pango_layout_set_attributes(text->layout, text->attrs);
461
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
272 if (text->align == TEXTALIGN_START)
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
273 pango_layout_set_alignment(text->layout, PANGO_ALIGN_LEFT);
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
274 else if (text->align == TEXTALIGN_MIDDLE)
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
275 pango_layout_set_alignment(text->layout, PANGO_ALIGN_CENTER);
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
276 else if (text->align == TEXTALIGN_END)
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
277 pango_layout_set_alignment(text->layout, PANGO_ALIGN_RIGHT);
285
248a40d51473 Check in test program for sh_text_set_text for debugging. It is not working yet.
wycc
parents: 280
diff changeset
278 pango_cairo_update_layout(cr,text->layout);
461
61a0bceb369d Add alignment support for the text layout
wycc@122-116-38-188.HINET-IP.hinet.net
parents: 448
diff changeset
279 //printf("text=%s\n",text->data);
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
wycc
parents: 224
diff changeset
280 }
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
281 static void draw_text(sh_text_t *text, mbe_t *cr) {
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
282 mbe_move_to(cr, text->d_x, text->d_y);
330
b0571f10c1b8 Use pango_cairo_layout_path() instead of pango_cairo_show_layout().
Thinker K.F. Li <thinker@branda.to>
parents: 303
diff changeset
283 pango_cairo_layout_path(cr,text->layout);
27
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
284 }
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
285
19c603dd6ff9 Add text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
286
448
16116d84bc5e Replace Cairo with a abstract layer mb_graph_engine.
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
287 void sh_text_draw(shape_t *shape, mbe_t *cr) {
30
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents: 27
diff changeset
288 draw_text((sh_text_t *)shape, cr);
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents: 27
diff changeset
289 }
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents: 27
diff changeset
290