Mercurial > MadButterfly

annotate src/shape_text.c @ 294:2ca0773cd48d

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* Add MBAF files * Change begin_index to be start_index * fix the color setting.
author wycc
date Sun, 01 Feb 2009 09:51:12 +0800
parents 7270e368ee98
children f894b30676e9
rev   line source
27
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Thinker K.F. Li <thinker@branda.to>
parents:
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 <cairo.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;
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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 cairo_font_face_t *face;
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22 cairo_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 cairo_scaled_font_destroy(text->scaled_font);
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36 cairo_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,cairo_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, cairo_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
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50 memset(text, 0, sizeof(sh_text_t));
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51 mb_obj_init(text, MBO_TEXT);
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52 text->data = strdup(txt);
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53 if(text->data == NULL) {
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54 free(text);
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55 return NULL;
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56 }
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57 text->x = x;
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58 text->y = y;
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59 text->font_size = font_size;
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60 cairo_font_face_reference(face);
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61 text->face = face;
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62 text->flags |= TXF_SCALE_DIRTY;
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63
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64 text->shape.free = sh_text_free;
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65 text->layout = NULL;
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66 text->attrs = attrs;
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67 text->align = TEXTALIGN_START;
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68 sh_text_P_generate_layout(text, rdman->cr);
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69
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70 rdman_shape_man(rdman, (shape_t *)text);
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71
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72 return (shape_t *)text;
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73 }
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74
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75 extern void sh_text_set_text(shape_t *shape, const char *txt) {
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76 sh_text_t *text = (sh_text_t *)shape;
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77 char *buf;
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78
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79 buf = strdup(txt);
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80 if(text->data) free(text->data);
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81 text->data = buf;
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82 }
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83
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84 void sh_text_set_color(shape_t *shape, unsigned int color)
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85 {
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86 PangoAttribute *attr = pango_attr_foreground_new(TEXTCOLOR_RED(color)<<8,TEXTCOLOR_GREEN(color)<<8,TEXTCOLOR_BLUE(color)<<8);
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87 sh_text_t *text = (sh_text_t *)shape;
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88 attr->start_index = 0;
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89 attr->end_index = -1;
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90 pango_attr_list_change(text->attrs, attr);
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91 }
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92 void sh_text_set_bold(shape_t *shape,int bold)
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93 {
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94 PangoAttribute *attr = pango_attr_weight_new(bold? PANGO_WEIGHT_BOLD:PANGO_WEIGHT_NORMAL);
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95 sh_text_t *text = (sh_text_t *)shape;
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96 attr->start_index = 0;
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97 attr->end_index = -1;
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98 pango_attr_list_change(text->attrs, attr);
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99 }
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100 void sh_text_set_italic(shape_t *shape,int italic)
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101 {
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102 PangoAttribute *attr = pango_attr_style_new(italic? PANGO_STYLE_ITALIC:PANGO_STYLE_NORMAL);
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103 sh_text_t *text = (sh_text_t *)shape;
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104 attr->start_index = 0;
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105 attr->end_index = -1;
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106 pango_attr_list_change(text->attrs, attr);
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107 }
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108 void sh_text_set_underline(shape_t *shape,int underline)
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109 {
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110 PangoAttribute *attr = pango_attr_underline_new(underline? PANGO_UNDERLINE_SINGLE:PANGO_UNDERLINE_NONE);
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111 sh_text_t *text = (sh_text_t *)shape;
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112 attr->start_index = 0;
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113 attr->end_index = -1;
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114 pango_attr_list_change(text->attrs, attr);
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115 }
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116 void sh_text_set_font(shape_t *shape,char *family)
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117 {
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118 PangoAttribute *attr = pango_attr_family_new(family);
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119 sh_text_t *text = (sh_text_t *)shape;
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120 attr->start_index = 0;
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121 attr->end_index = -1;
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122 pango_attr_list_change(text->attrs, attr);
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123 }
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124
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125 void sh_text_set_style(shape_t *shape,int begin,int end,mb_textstyle_t *format)
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126 {
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127 PangoAttribute *attr;
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128 sh_text_t *text = (sh_text_t *)shape;
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129
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130 if (end == -1) {
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131 end = strlen(text->data);
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132 } else
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133 end++;
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134 if (format->property & TEXTSTYLE_BOLD) {
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135 attr = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
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136 attr->start_index = begin;
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137 attr->end_index = end;
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138 pango_attr_list_change(text->attrs,attr);
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139 }
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140 if (format->property & TEXTSTYLE_ITALIC) {
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141 attr = pango_attr_style_new(PANGO_STYLE_ITALIC);
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142 attr->start_index = begin;
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143 attr->end_index = end;
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144 pango_attr_list_change(text->attrs,attr);
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145 }
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146 if (format->property & TEXTSTYLE_UNDERLINE) {
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147 attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
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148 attr->start_index = begin;
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149 attr->end_index = end;
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150 pango_attr_list_change(text->attrs,attr);
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151 }
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152 if (format->property & TEXTSTYLE_COLOR) {
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153 printf("color=%x\n", format->color);
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154 printf("red = %x\n",TEXTCOLOR_RED(format->color));
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155 printf("green = %x\n",TEXTCOLOR_GREEN(format->color));
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156 printf("blue = %x\n",TEXTCOLOR_BLUE(format->color));
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157 attr = pango_attr_foreground_new(TEXTCOLOR_RED(format->color)<<8,TEXTCOLOR_GREEN(format->color)<<8,TEXTCOLOR_BLUE(format->color)<<8);
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158 attr->start_index = begin;
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159 attr->end_index = end;
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160 pango_attr_list_change(text->attrs,attr);
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161 }
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162 if (format->property & TEXTSTYLE_FONT) {
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163 attr = pango_attr_family_new(format->font);
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164 attr->start_index = begin;
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165 attr->end_index = end;
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166 pango_attr_list_change(text->attrs,attr);
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167 }
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168 if (format->property & TEXTSTYLE_ALIGN) {
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169 // We can have one align style for the whole text only
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170 if (begin != 0 || (end != strlen(text->data)-1))
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171 return;
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172 text->align = format->align;
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173 }
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174 }
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175
279
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176 static int get_extents(sh_text_t *text, PangoRectangle *extents) {
27
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177 cairo_matrix_t fmatrix;
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178 cairo_matrix_t ctm;
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179 cairo_scaled_font_t *new_scaled;
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180 cairo_font_options_t *fopt;
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181
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182 pango_layout_get_extents(text->layout, NULL, extents);
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183 pango_extents_to_pixels(extents,NULL);
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184 return OK;
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185 }
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186
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187 void sh_text_transform(shape_t *shape) {
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188 sh_text_t *text;
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189 co_aix x, y;
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190 co_aix shw;
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191 PangoRectangle extents;
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192 co_aix poses[2][2];
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193 int r;
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194
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195 text = (sh_text_t *)shape;
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196
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197 text->d_font_size = coord_trans_size(shape->coord, text->font_size);
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198
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199 x = text->x;
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200 y = text->y;
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201 coord_trans_pos(shape->coord, &x, &y);
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202 r = get_extents(text, &extents);
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203
280
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204 //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
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205 ASSERT(r == OK);
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206
285
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207 text->d_x = x-5;
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208 text->d_y = y-PANGO_DESCENT(extents)+5;
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209 shw = shape->stroke_width / 2;
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210 /* FIXME: It is unreasonable that a font exceed it's bbox.
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211 * We add 5 pixels in get right bbox. But, it is unreasonable.
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212 */
279
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213
289
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diff changeset
214 poses[0][0] = text->d_x + extents.x - shw;
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215 poses[0][1] = text->d_y + extents.y - shw;
285
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216 poses[1][0] = poses[0][0] + extents.width + shape->stroke_width;
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217 poses[1][1] = poses[0][1] + extents.height + shape->stroke_width;
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218 geo_from_positions(shape->geo, 2, poses);
104
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219 /*! \todo Support ratation for shape_text. */
27
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220 }
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221
278
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222 static void sh_text_P_generate_layout(sh_text_t *text,cairo_t *cr)
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223 {
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224 PangoAttribute *attr;
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225 PangoAttrList *attrlist;
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226 PangoFontDescription *desc;
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227
278
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228 if (text->layout) {
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229 g_object_unref(text->layout);
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230 }
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231 text->layout = pango_cairo_create_layout(cr);
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232 desc = pango_font_description_from_string("Sans Bold");
285
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233 cairo_set_source_rgb (cr, 0, 0, 0);
278
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234 pango_layout_set_font_description (text->layout, desc);
279
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235 pango_layout_set_text(text->layout,text->data,strlen(text->data));
278
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diff changeset
236 pango_layout_set_attributes(text->layout, text->attrs);
285
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diff changeset
237 pango_cairo_update_layout(cr,text->layout);
291
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238 printf("text=%s\n",text->data);
278
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diff changeset
239 }
27
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diff changeset
240 static void draw_text(sh_text_t *text, cairo_t *cr) {
279
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diff changeset
241 sh_text_P_generate_layout(text, cr);
27
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parents:
diff changeset
242 cairo_move_to(cr, text->d_x, text->d_y);
278
a90fd749af82 Implement the whole tspan attribute. Currently, we can accept font family/font style/font weight and font size.
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diff changeset
243 pango_cairo_show_layout(cr,text->layout);
27
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244 }
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parents:
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245
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parents:
diff changeset
246
30
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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diff changeset
247 void sh_text_draw(shape_t *shape, cairo_t *cr) {
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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parents: 27
diff changeset
248 draw_text((sh_text_t *)shape, cr);
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parents: 27
diff changeset
249 }
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
250