rosapps/smartpdf/src/DisplayState.cc

   1 /* Copyright Krzysztof Kowalczyk 2006-2007
   2    License: GPLv2 */
   3 #include "DisplayState.h"
   4 #include "str_util.h"
   5 #include "dstring.h"
   6
   7 #include <assert.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10
  11 void normalizeRotation(int *rotation)
  12 {
  13     assert(rotation);
  14     if (!rotation) return;
  15     while (*rotation < 0)
  16         *rotation += 360;
  17     while (*rotation >= 360)
  18         *rotation -= 360;
  19 }
  20
  21 BOOL validRotation(int rotation)
  22 {
  23     normalizeRotation(&rotation);
  24     if ((0 == rotation) || (90 == rotation) ||
  25         (180 == rotation) || (270 == rotation))
  26         return TRUE;
  27     return FALSE;
  28 }
  29
  30 BOOL ValidZoomVirtual(double zoomVirtual)
  31 {
  32     if ((ZOOM_FIT_PAGE == zoomVirtual) || (ZOOM_FIT_WIDTH == zoomVirtual))
  33         return TRUE;
  34     if ((zoomVirtual < ZOOM_MIN) || (zoomVirtual > ZOOM_MAX)) {
  35         DBG_OUT("ValidZoomVirtual() invalid zoom: %.4f\n", zoomVirtual);
  36         return FALSE;
  37     }
  38     return TRUE;
  39 }
  40
  41 #define STR_FROM_ENUM(val) \
  42     if (val == var) \
  43         return val##_STR;
  44
  45 const char *DisplayModeNameFromEnum(DisplayMode var)
  46 {
  47     STR_FROM_ENUM(DM_SINGLE_PAGE)
  48     STR_FROM_ENUM(DM_FACING)
  49     STR_FROM_ENUM(DM_CONTINUOUS)
  50     STR_FROM_ENUM(DM_CONTINUOUS_FACING)
  51     return NULL;
  52 }
  53
  54 #define IS_STR_ENUM(enumName) \
  55     if (str_eq(txt, enumName##_STR)) { \
  56         *resOut = enumName; \
  57         return TRUE; \
  58     }
  59
  60 BOOL DisplayModeEnumFromName(const char *txt, DisplayMode *resOut)
  61 {
  62     IS_STR_ENUM(DM_SINGLE_PAGE)
  63     IS_STR_ENUM(DM_FACING)
  64     IS_STR_ENUM(DM_CONTINUOUS)
  65     IS_STR_ENUM(DM_CONTINUOUS_FACING)
  66     assert(0);
  67     return FALSE;
  68 }
  69
  70 void DisplayState_Init(DisplayState *ds)
  71 {
  72     memzero(ds, sizeof(DisplayState));
  73     ds->displayMode = DM_SINGLE_PAGE;
  74     ds->visible = FALSE;
  75     ds->fullScreen = FALSE;
  76     ds->pageNo = 1;
  77     ds->zoomVirtual = 100.0;
  78     ds->rotation = 0;
  79 }
  80
  81 void DisplayState_Free(DisplayState *ds)
  82 {
  83     free((void*)ds->filePath);
  84     DisplayState_Init(ds);
  85 }
  86
  87 BOOL DisplayState_Serialize(DisplayState *ds, DString *strOut)
  88 {
  89     const char *        displayModeName = NULL;
  90
  91     DStringSprintf(strOut, "  %s: %s\n", FILE_STR, ds->filePath);
  92
  93     displayModeName = DisplayModeNameFromEnum(ds->displayMode);
  94     if (displayModeName)
  95         DStringSprintf(strOut, "  %s: %s\n", DISPLAY_MODE_STR, displayModeName);
  96     else
  97         DStringSprintf(strOut, "  %s: %s\n", DISPLAY_MODE_STR, DisplayModeNameFromEnum(DM_SINGLE_PAGE));
  98
  99     DStringSprintf(strOut, "  %s: %d\n",   VISIBLE_STR, ds->visible);
 100     DStringSprintf(strOut, "  %s: %d\n",   PAGE_NO_STR, ds->pageNo);
 101     DStringSprintf(strOut, "  %s: %.4f\n", ZOOM_VIRTUAL_STR, ds->zoomVirtual);
 102     DStringSprintf(strOut, "  %s: %d\n",   ROTATION_STR, ds->rotation);
 103     DStringSprintf(strOut, "  %s: %d\n",   FULLSCREEN_STR, (int)ds->fullScreen);
 104
 105     DStringSprintf(strOut, "  %s: %d\n",   SCROLL_X_STR, ds->scrollX);
 106     DStringSprintf(strOut, "  %s: %d\n",   SCROLL_Y_STR, ds->scrollY);
 107
 108     DStringSprintf(strOut, "  %s: %d\n",   WINDOW_X_STR, ds->windowX);
 109     DStringSprintf(strOut, "  %s: %d\n",   WINDOW_Y_STR, ds->windowY);
 110     DStringSprintf(strOut, "  %s: %d\n",   WINDOW_DX_STR, ds->windowDx);
 111     DStringSprintf(strOut, "  %s: %d\n",   WINDOW_DY_STR, ds->windowDy);
 112     return TRUE;
 113 }
 114