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Diffstat (limited to 'public/fpdf_text.h')
| -rw-r--r-- | public/fpdf_text.h | 310 |
1 files changed, 155 insertions, 155 deletions
diff --git a/public/fpdf_text.h b/public/fpdf_text.h index d37715f6b8..32f5c7c15b 100644 --- a/public/fpdf_text.h +++ b/public/fpdf_text.h @@ -1,11 +1,11 @@ // Copyright 2014 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. - + // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com -#ifndef _FPDFTEXT_H_ -#define _FPDFTEXT_H_ +#ifndef PUBLIC_FPDF_TEXT_H_ +#define PUBLIC_FPDF_TEXT_H_ #include "fpdfview.h" @@ -15,306 +15,306 @@ extern "C" { #endif // Function: FPDFText_LoadPage -// Prepare information about all characters in a page. +// Prepare information about all characters in a page. // Parameters: -// page - Handle to the page. Returned by FPDF_LoadPage function (in FPDFVIEW module). +// page - Handle to the page. Returned by FPDF_LoadPage function (in FPDFVIEW module). // Return value: -// A handle to the text page information structure. -// NULL if something goes wrong. +// A handle to the text page information structure. +// NULL if something goes wrong. // Comments: -// Application must call FPDFText_ClosePage to release the text page information. +// Application must call FPDFText_ClosePage to release the text page information. // -DLLEXPORT FPDF_TEXTPAGE STDCALL FPDFText_LoadPage(FPDF_PAGE page); +DLLEXPORT FPDF_TEXTPAGE STDCALL FPDFText_LoadPage(FPDF_PAGE page); // Function: FPDFText_ClosePage -// Release all resources allocated for a text page information structure. +// Release all resources allocated for a text page information structure. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. // Return Value: -// None. +// None. // DLLEXPORT void STDCALL FPDFText_ClosePage(FPDF_TEXTPAGE text_page); // Function: FPDFText_CountChars -// Get number of characters in a page. +// Get number of characters in a page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. // Return value: -// Number of characters in the page. Return -1 for error. -// Generated characters, like additional space characters, new line characters, are also counted. +// Number of characters in the page. Return -1 for error. +// Generated characters, like additional space characters, new line characters, are also counted. // Comments: -// Characters in a page form a "stream", inside the stream, each character has an index. -// We will use the index parameters in many of FPDFTEXT functions. The first character in the page -// has an index value of zero. +// Characters in a page form a "stream", inside the stream, each character has an index. +// We will use the index parameters in many of FPDFTEXT functions. The first character in the page +// has an index value of zero. // DLLEXPORT int STDCALL FPDFText_CountChars(FPDF_TEXTPAGE text_page); // Function: FPDFText_GetUnicode -// Get Unicode of a character in a page. +// Get Unicode of a character in a page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// index - Zero-based index of the character. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// index - Zero-based index of the character. // Return value: -// The Unicode of the particular character. -// If a character is not encoded in Unicode and Foxit engine can't convert to Unicode, -// the return value will be zero. +// The Unicode of the particular character. +// If a character is not encoded in Unicode and Foxit engine can't convert to Unicode, +// the return value will be zero. // DLLEXPORT unsigned int STDCALL FPDFText_GetUnicode(FPDF_TEXTPAGE text_page, int index); // Function: FPDFText_GetFontSize -// Get the font size of a particular character. +// Get the font size of a particular character. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// index - Zero-based index of the character. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// index - Zero-based index of the character. // Return value: -// The font size of the particular character, measured in points (about 1/72 inch). -// This is the typographic size of the font (so called "em size"). +// The font size of the particular character, measured in points (about 1/72 inch). +// This is the typographic size of the font (so called "em size"). // DLLEXPORT double STDCALL FPDFText_GetFontSize(FPDF_TEXTPAGE text_page, int index); // Function: FPDFText_GetCharBox -// Get bounding box of a particular character. +// Get bounding box of a particular character. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// index - Zero-based index of the character. -// left - Pointer to a double number receiving left position of the character box. -// right - Pointer to a double number receiving right position of the character box. -// bottom - Pointer to a double number receiving bottom position of the character box. -// top - Pointer to a double number receiving top position of the character box. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// index - Zero-based index of the character. +// left - Pointer to a double number receiving left position of the character box. +// right - Pointer to a double number receiving right position of the character box. +// bottom - Pointer to a double number receiving bottom position of the character box. +// top - Pointer to a double number receiving top position of the character box. // Return Value: -// None. +// None. // Comments: -// All positions are measured in PDF "user space". +// All positions are measured in PDF "user space". // DLLEXPORT void STDCALL FPDFText_GetCharBox(FPDF_TEXTPAGE text_page, int index, double* left, - double* right, double* bottom, double* top); + double* right, double* bottom, double* top); // Function: FPDFText_GetCharIndexAtPos -// Get the index of a character at or nearby a certain position on the page. +// Get the index of a character at or nearby a certain position on the page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// x - X position in PDF "user space". -// y - Y position in PDF "user space". -// xTolerance - An x-axis tolerance value for character hit detection, in point unit. -// yTolerance - A y-axis tolerance value for character hit detection, in point unit. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// x - X position in PDF "user space". +// y - Y position in PDF "user space". +// xTolerance - An x-axis tolerance value for character hit detection, in point unit. +// yTolerance - A y-axis tolerance value for character hit detection, in point unit. // Return Value: -// The zero-based index of the character at, or nearby the point (x,y). -// If there is no character at or nearby the point, return value will be -1. -// If an error occurs, -3 will be returned. +// The zero-based index of the character at, or nearby the point (x,y). +// If there is no character at or nearby the point, return value will be -1. +// If an error occurs, -3 will be returned. // DLLEXPORT int STDCALL FPDFText_GetCharIndexAtPos(FPDF_TEXTPAGE text_page, - double x, double y, double xTorelance, double yTolerance); + double x, double y, double xTorelance, double yTolerance); // Function: FPDFText_GetText -// Extract unicode text string from the page. +// Extract unicode text string from the page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// start_index - Index for the start characters. -// count - Number of characters to be extracted. -// result - A buffer (allocated by application) receiving the extracted unicodes. -// The size of the buffer must be able to hold the number of characters plus a terminator. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// start_index - Index for the start characters. +// count - Number of characters to be extracted. +// result - A buffer (allocated by application) receiving the extracted unicodes. +// The size of the buffer must be able to hold the number of characters plus a terminator. // Return Value: -// Number of characters written into the result buffer, including the trailing terminator. +// Number of characters written into the result buffer, including the trailing terminator. // Comments: -// This function ignores characters without unicode information. +// This function ignores characters without unicode information. // DLLEXPORT int STDCALL FPDFText_GetText(FPDF_TEXTPAGE text_page, int start_index, int count, unsigned short* result); // Function: FPDFText_CountRects -// Count number of rectangular areas occupied by a segment of texts. +// Count number of rectangular areas occupied by a segment of texts. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// start_index - Index for the start characters. -// count - Number of characters. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// start_index - Index for the start characters. +// count - Number of characters. // Return value: -// Number of rectangles. Zero for error. +// Number of rectangles. Zero for error. // Comments: -// This function, along with FPDFText_GetRect can be used by applications to detect the position -// on the page for a text segment, so proper areas can be highlighted or something. -// FPDFTEXT will automatically merge small character boxes into bigger one if those characters -// are on the same line and use same font settings. +// This function, along with FPDFText_GetRect can be used by applications to detect the position +// on the page for a text segment, so proper areas can be highlighted or something. +// FPDFTEXT will automatically merge small character boxes into bigger one if those characters +// are on the same line and use same font settings. // DLLEXPORT int STDCALL FPDFText_CountRects(FPDF_TEXTPAGE text_page, int start_index, int count); // Function: FPDFText_GetRect -// Get a rectangular area from the result generated by FPDFText_CountRects. +// Get a rectangular area from the result generated by FPDFText_CountRects. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// rect_index - Zero-based index for the rectangle. -// left - Pointer to a double value receiving the rectangle left boundary. -// top - Pointer to a double value receiving the rectangle top boundary. -// right - Pointer to a double value receiving the rectangle right boundary. -// bottom - Pointer to a double value receiving the rectangle bottom boundary. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// rect_index - Zero-based index for the rectangle. +// left - Pointer to a double value receiving the rectangle left boundary. +// top - Pointer to a double value receiving the rectangle top boundary. +// right - Pointer to a double value receiving the rectangle right boundary. +// bottom - Pointer to a double value receiving the rectangle bottom boundary. // Return Value: -// None. +// None. // DLLEXPORT void STDCALL FPDFText_GetRect(FPDF_TEXTPAGE text_page, int rect_index, double* left, double* top, - double* right, double* bottom); + double* right, double* bottom); // Function: FPDFText_GetBoundedText -// Extract unicode text within a rectangular boundary on the page. +// Extract unicode text within a rectangular boundary on the page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// left - Left boundary. -// top - Top boundary. -// right - Right boundary. -// bottom - Bottom boundary. -// buffer - A unicode buffer. -// buflen - Number of characters (not bytes) for the buffer, excluding an additional terminator. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// left - Left boundary. +// top - Top boundary. +// right - Right boundary. +// bottom - Bottom boundary. +// buffer - A unicode buffer. +// buflen - Number of characters (not bytes) for the buffer, excluding an additional terminator. // Return Value: -// If buffer is NULL or buflen is zero, return number of characters (not bytes) of text present within -// the rectangle, excluding a terminating NUL. Generally you should pass a buffer at least one larger -// than this if you want a terminating NUL, which will be provided if space is available. -// Otherwise, return number of characters copied into the buffer, including the terminating NUL -// when space for it is available. +// If buffer is NULL or buflen is zero, return number of characters (not bytes) of text present within +// the rectangle, excluding a terminating NUL. Generally you should pass a buffer at least one larger +// than this if you want a terminating NUL, which will be provided if space is available. +// Otherwise, return number of characters copied into the buffer, including the terminating NUL +// when space for it is available. // Comment: -// If the buffer is too small, as much text as will fit is copied into it. +// If the buffer is too small, as much text as will fit is copied into it. // DLLEXPORT int STDCALL FPDFText_GetBoundedText(FPDF_TEXTPAGE text_page,double left, double top, - double right, double bottom,unsigned short* buffer,int buflen); + double right, double bottom,unsigned short* buffer,int buflen); // Flags used by FPDFText_FindStart function. -#define FPDF_MATCHCASE 0x00000001 //If not set, it will not match case by default. -#define FPDF_MATCHWHOLEWORD 0x00000002 //If not set, it will not match the whole word by default. +#define FPDF_MATCHCASE 0x00000001 //If not set, it will not match case by default. +#define FPDF_MATCHWHOLEWORD 0x00000002 //If not set, it will not match the whole word by default. // Function: FPDFText_FindStart -// Start a search. +// Start a search. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. -// findwhat - A unicode match pattern. -// flags - Option flags. -// start_index - Start from this character. -1 for end of the page. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// findwhat - A unicode match pattern. +// flags - Option flags. +// start_index - Start from this character. -1 for end of the page. // Return Value: -// A handle for the search context. FPDFText_FindClose must be called to release this handle. +// A handle for the search context. FPDFText_FindClose must be called to release this handle. // DLLEXPORT FPDF_SCHHANDLE STDCALL FPDFText_FindStart(FPDF_TEXTPAGE text_page, FPDF_WIDESTRING findwhat, - unsigned long flags, int start_index); + unsigned long flags, int start_index); // Function: FPDFText_FindNext -// Search in the direction from page start to end. +// Search in the direction from page start to end. // Parameters: -// handle - A search context handle returned by FPDFText_FindStart. +// handle - A search context handle returned by FPDFText_FindStart. // Return Value: -// Whether a match is found. +// Whether a match is found. // DLLEXPORT FPDF_BOOL STDCALL FPDFText_FindNext(FPDF_SCHHANDLE handle); // Function: FPDFText_FindPrev -// Search in the direction from page end to start. +// Search in the direction from page end to start. // Parameters: -// handle - A search context handle returned by FPDFText_FindStart. +// handle - A search context handle returned by FPDFText_FindStart. // Return Value: -// Whether a match is found. +// Whether a match is found. // DLLEXPORT FPDF_BOOL STDCALL FPDFText_FindPrev(FPDF_SCHHANDLE handle); // Function: FPDFText_GetSchResultIndex -// Get the starting character index of the search result. +// Get the starting character index of the search result. // Parameters: -// handle - A search context handle returned by FPDFText_FindStart. +// handle - A search context handle returned by FPDFText_FindStart. // Return Value: -// Index for the starting character. +// Index for the starting character. // DLLEXPORT int STDCALL FPDFText_GetSchResultIndex(FPDF_SCHHANDLE handle); // Function: FPDFText_GetSchCount -// Get the number of matched characters in the search result. +// Get the number of matched characters in the search result. // Parameters: -// handle - A search context handle returned by FPDFText_FindStart. +// handle - A search context handle returned by FPDFText_FindStart. // Return Value: -// Number of matched characters. +// Number of matched characters. // DLLEXPORT int STDCALL FPDFText_GetSchCount(FPDF_SCHHANDLE handle); // Function: FPDFText_FindClose -// Release a search context. +// Release a search context. // Parameters: -// handle - A search context handle returned by FPDFText_FindStart. +// handle - A search context handle returned by FPDFText_FindStart. // Return Value: -// None. +// None. // DLLEXPORT void STDCALL FPDFText_FindClose(FPDF_SCHHANDLE handle); // Function: FPDFLink_LoadWebLinks -// Prepare information about weblinks in a page. +// Prepare information about weblinks in a page. // Parameters: -// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. +// text_page - Handle to a text page information structure. Returned by FPDFText_LoadPage function. // Return Value: -// A handle to the page's links information structure. -// NULL if something goes wrong. +// A handle to the page's links information structure. +// NULL if something goes wrong. // Comments: -// Weblinks are those links implicitly embedded in PDF pages. PDF also has a type of -// annotation called "link", FPDFTEXT doesn't deal with that kind of link. -// FPDFTEXT weblink feature is useful for automatically detecting links in the page -// contents. For example, things like "http://www.foxitsoftware.com" will be detected, -// so applications can allow user to click on those characters to activate the link, -// even the PDF doesn't come with link annotations. +// Weblinks are those links implicitly embedded in PDF pages. PDF also has a type of +// annotation called "link", FPDFTEXT doesn't deal with that kind of link. +// FPDFTEXT weblink feature is useful for automatically detecting links in the page +// contents. For example, things like "http://www.foxitsoftware.com" will be detected, +// so applications can allow user to click on those characters to activate the link, +// even the PDF doesn't come with link annotations. // -// FPDFLink_CloseWebLinks must be called to release resources. +// FPDFLink_CloseWebLinks must be called to release resources. // DLLEXPORT FPDF_PAGELINK STDCALL FPDFLink_LoadWebLinks(FPDF_TEXTPAGE text_page); // Function: FPDFLink_CountWebLinks -// Count number of detected web links. +// Count number of detected web links. // Parameters: -// link_page - Handle returned by FPDFLink_LoadWebLinks. +// link_page - Handle returned by FPDFLink_LoadWebLinks. // Return Value: -// Number of detected web links. +// Number of detected web links. // DLLEXPORT int STDCALL FPDFLink_CountWebLinks(FPDF_PAGELINK link_page); // Function: FPDFLink_GetURL -// Fetch the URL information for a detected web link. +// Fetch the URL information for a detected web link. // Parameters: -// link_page - Handle returned by FPDFLink_LoadWebLinks. -// link_index - Zero-based index for the link. -// buffer - A unicode buffer. -// buflen - Number of characters (not bytes) for the buffer, including an additional terminator. +// link_page - Handle returned by FPDFLink_LoadWebLinks. +// link_index - Zero-based index for the link. +// buffer - A unicode buffer. +// buflen - Number of characters (not bytes) for the buffer, including an additional terminator. // Return Value: -// If buffer is NULL or buflen is zero, return number of characters (not bytes and an additional terminator is also counted) needed, -// otherwise, return number of characters copied into the buffer. +// If buffer is NULL or buflen is zero, return number of characters (not bytes and an additional terminator is also counted) needed, +// otherwise, return number of characters copied into the buffer. // DLLEXPORT int STDCALL FPDFLink_GetURL(FPDF_PAGELINK link_page, int link_index, unsigned short* buffer,int buflen); // Function: FPDFLink_CountRects -// Count number of rectangular areas for the link. +// Count number of rectangular areas for the link. // Parameters: -// link_page - Handle returned by FPDFLink_LoadWebLinks. -// link_index - Zero-based index for the link. +// link_page - Handle returned by FPDFLink_LoadWebLinks. +// link_index - Zero-based index for the link. // Return Value: -// Number of rectangular areas for the link. +// Number of rectangular areas for the link. // DLLEXPORT int STDCALL FPDFLink_CountRects(FPDF_PAGELINK link_page, int link_index); // Function: FPDFLink_GetRect -// Fetch the boundaries of a rectangle for a link. +// Fetch the boundaries of a rectangle for a link. // Parameters: -// link_page - Handle returned by FPDFLink_LoadWebLinks. -// link_index - Zero-based index for the link. -// rect_index - Zero-based index for a rectangle. -// left - Pointer to a double value receiving the rectangle left boundary. -// top - Pointer to a double value receiving the rectangle top boundary. -// right - Pointer to a double value receiving the rectangle right boundary. -// bottom - Pointer to a double value receiving the rectangle bottom boundary. +// link_page - Handle returned by FPDFLink_LoadWebLinks. +// link_index - Zero-based index for the link. +// rect_index - Zero-based index for a rectangle. +// left - Pointer to a double value receiving the rectangle left boundary. +// top - Pointer to a double value receiving the rectangle top boundary. +// right - Pointer to a double value receiving the rectangle right boundary. +// bottom - Pointer to a double value receiving the rectangle bottom boundary. // Return Value: -// None. +// None. // DLLEXPORT void STDCALL FPDFLink_GetRect(FPDF_PAGELINK link_page, int link_index, int rect_index, - double* left, double* top,double* right, double* bottom); + double* left, double* top,double* right, double* bottom); // Function: FPDFLink_CloseWebLinks -// Release resources used by weblink feature. +// Release resources used by weblink feature. // Parameters: -// link_page - Handle returned by FPDFLink_LoadWebLinks. +// link_page - Handle returned by FPDFLink_LoadWebLinks. // Return Value: -// None. +// None. // DLLEXPORT void STDCALL FPDFLink_CloseWebLinks(FPDF_PAGELINK link_page); #ifdef __cplusplus -}; +} #endif -#endif//_FPDFTEXT_H_ +#endif // PUBLIC_FPDF_TEXT_H_ |