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authorTom Sepez <tsepez@chromium.org>2015-05-11 14:27:24 -0700
committerTom Sepez <tsepez@chromium.org>2015-05-11 14:27:24 -0700
commitac19d2d8f64ab87577f167e0a8df075a7fe3ffdc (patch)
tree3c8e9be3b07c4818c7866babf3f98ef78aed8fc2 /fpdfsdk/include/fpdftext.h
parent06272311aca7ead4f419b65ca41673f1599218ae (diff)
downloadpdfium-ac19d2d8f64ab87577f167e0a8df075a7fe3ffdc.tar.xz
Create top-level public/ header directory.
These are the only files that embedders of PDFium should be including. They are entirely self-contained, and compile cleanly against -Wall so as to not offend the code that may include them. Having done this, we can see that chromium is pulling in two additional files from the fpdfsdk/include/pdfwindow directory, which is not guaranteed to work. A few files are renamed, adding an "_" to make the names consistent. The exception is fpdfview, which is doc'd as such in the doc. Naturally, paths will need updating in a handful of files in chrome when this rolls in. BUG=pdfium:154 R=thestig@chromium.org Review URL: https://codereview.chromium.org/1135913002
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-// 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_
-
-#include "fpdfview.h"
-
-// Exported Functions
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Function: FPDFText_LoadPage
-// Prepare information about all characters in a page.
-// Parameters:
-// 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.
-// Comments:
-// Application must call FPDFText_ClosePage to release the text page information.
-//
-DLLEXPORT FPDF_TEXTPAGE STDCALL FPDFText_LoadPage(FPDF_PAGE page);
-
-// Function: FPDFText_ClosePage
-// 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.
-// Return Value:
-// None.
-//
-DLLEXPORT void STDCALL FPDFText_ClosePage(FPDF_TEXTPAGE text_page);
-
-// Function: FPDFText_CountChars
-// Get number of characters in a page.
-// Parameters:
-// 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.
-// 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.
-//
-DLLEXPORT int STDCALL FPDFText_CountChars(FPDF_TEXTPAGE text_page);
-
-// Function: FPDFText_GetUnicode
-// 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.
-// 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.
-//
-DLLEXPORT unsigned int STDCALL FPDFText_GetUnicode(FPDF_TEXTPAGE text_page, int index);
-
-// Function: FPDFText_GetFontSize
-// 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.
-// 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").
-//
-DLLEXPORT double STDCALL FPDFText_GetFontSize(FPDF_TEXTPAGE text_page, int index);
-
-// Function: FPDFText_GetCharBox
-// 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.
-// Return Value:
-// None.
-// Comments:
-// 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);
-
-// Function: FPDFText_GetCharIndexAtPos
-// 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.
-// 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.
-//
-DLLEXPORT int STDCALL FPDFText_GetCharIndexAtPos(FPDF_TEXTPAGE text_page,
- double x, double y, double xTorelance, double yTolerance);
-
-// Function: FPDFText_GetText
-// 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.
-// Return Value:
-// Number of characters written into the result buffer, including the trailing terminator.
-// Comments:
-// 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.
-// 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.
-// Return value:
-// 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.
-//
-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.
-// 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.
-// Return Value:
-// None.
-//
-DLLEXPORT void STDCALL FPDFText_GetRect(FPDF_TEXTPAGE text_page, int rect_index, double* left, double* top,
- double* right, double* bottom);
-
-// Function: FPDFText_GetBoundedText
-// 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.
-// 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.
-// Comment:
-// 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);
-
-
-// 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.
-
-// Function: FPDFText_FindStart
-// 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.
-// Return Value:
-// 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);
-
-// Function: FPDFText_FindNext
-// Search in the direction from page start to end.
-// Parameters:
-// handle - A search context handle returned by FPDFText_FindStart.
-// Return Value:
-// 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.
-// Parameters:
-// handle - A search context handle returned by FPDFText_FindStart.
-// Return Value:
-// 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.
-// Parameters:
-// handle - A search context handle returned by FPDFText_FindStart.
-// Return Value:
-// 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.
-// Parameters:
-// handle - A search context handle returned by FPDFText_FindStart.
-// Return Value:
-// Number of matched characters.
-//
-DLLEXPORT int STDCALL FPDFText_GetSchCount(FPDF_SCHHANDLE handle);
-
-// Function: FPDFText_FindClose
-// Release a search context.
-// Parameters:
-// handle - A search context handle returned by FPDFText_FindStart.
-// Return Value:
-// None.
-//
-DLLEXPORT void STDCALL FPDFText_FindClose(FPDF_SCHHANDLE handle);
-
-// Function: FPDFLink_LoadWebLinks
-// Prepare information about weblinks in a page.
-// Parameters:
-// 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.
-// 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.
-//
-// 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.
-// Parameters:
-// link_page - Handle returned by FPDFLink_LoadWebLinks.
-// Return Value:
-// 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.
-// 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.
-// 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.
-//
-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.
-// Parameters:
-// link_page - Handle returned by FPDFLink_LoadWebLinks.
-// link_index - Zero-based index for the link.
-// Return Value:
-// 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.
-// 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.
-// Return Value:
-// None.
-//
-DLLEXPORT void STDCALL FPDFLink_GetRect(FPDF_PAGELINK link_page, int link_index, int rect_index,
- double* left, double* top,double* right, double* bottom);
-
-// Function: FPDFLink_CloseWebLinks
-// Release resources used by weblink feature.
-// Parameters:
-// link_page - Handle returned by FPDFLink_LoadWebLinks.
-// Return Value:
-// None.
-//
-DLLEXPORT void STDCALL FPDFLink_CloseWebLinks(FPDF_PAGELINK link_page);
-
-
-#ifdef __cplusplus
-};
-#endif
-
-#endif//_FPDFTEXT_H_